commit 7ee21c7d1a90e5b1bf1a815478dc2c622513c587
Author: Thomas Cherryhomes <thom.cherryhomes@gmail.com>
Date:   Fri Jan 25 16:09:42 2019 -0600

    Initial commit. Builds to skeleton.

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..cc1d68c
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,25 @@
+
+# To use this example as a standalone project using CMake:
+# mkdir build
+# cd build
+# cmake .. -DCMAKE_TOOLCHAIN_FILE=path/to/Retro68-build/toolchain/m68k-apple-macos/cmake/retro68.toolchain.cmake
+# make
+
+cmake_minimum_required(VERSION 2.8)
+
+add_application(PLATOTERM
+  help.c
+  io.c
+  keyboard.c
+  main.c
+  protocol.c
+  screen.c
+  terminal.c
+  touch.c
+  trace.c
+  )
+target_link_libraries(PLATOTERM "-lm")
+
+# save 200KB of code by removing unused stuff
+set_target_properties(PLATOTERM PROPERTIES LINK_FLAGS "-Wl,-gc-sections")
+
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..b5842e5
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+rm -rf build && mkdir build && cd build
+cmake .. -DCMAKE_TOOLCHAIN_FILE=~/Retro68/Retro68build/toolchain/m68k-apple-macos/cmake/retro68.toolchain.cmake && make && cp PLATOTERM.dsk /mnt/d/BasiliskII/
diff --git a/font.h b/font.h
new file mode 100644
index 0000000..74e280b
--- /dev/null
+++ b/font.h
@@ -0,0 +1,486 @@
+/**
+ * Font definitions for font memories M0 and M1
+ */
+
+unsigned char font[]={
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0x20  space */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x10,0x10,0x10,0x10,0x10,	/* 0x21  ! */
+0x10,0x00,0x00,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x28,0x28,0x28,0x00,0x00,	/* 0x22  " */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x28,0x28,0xfe,0x28,0xfe,	/* 0x23  # */
+0x28,0x28,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x10,0x7c,0x92,0x90,0x7c,	/* 0x24  $ */
+0x12,0x92,0x7c,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x40,0xa2,0xa4,0x48,0x10,	/* 0x25  % */
+0x24,0x4a,0x8a,0x04,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x20,0x50,0x50,0x20,0x62,	/* 0x26  & */
+0x92,0x8c,0x8c,0x72,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x10,0x10,0x10,0x00,0x00,	/* 0x27  ' */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x02,0x04,0x08,0x08,0x08,	/* 0x28  ( */
+0x08,0x08,0x08,0x04,0x02,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x80,0x40,0x20,0x20,0x20,	/* 0x29  ) */
+0x20,0x20,0x20,0x40,0x80,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x10,0x54,0x28,	/* 0x2a  * */
+0x28,0x54,0x10,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x10,	/* 0x2b  + */
+0x7c,0x10,0x10,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0x2c  , */
+0x00,0x00,0x30,0x30,0x10,0x20,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0x2d  - */
+0x7c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0x2e  . */
+0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x02,0x04,0x08,	/* 0x2f  / */
+0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x3a,0x44,0x4c,0x54,	/* 0x30  0 */
+0x54,0x64,0x44,0xb8,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x10,0x30,0x10,0x10,	/* 0x31  1 */
+0x10,0x10,0x10,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x38,0x44,0x04,0x08,	/* 0x32  2 */
+0x10,0x20,0x40,0x7c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x38,0x44,0x04,0x18,	/* 0x33  3 */
+0x04,0x04,0x44,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x04,0x0c,0x14,0x24,	/* 0x34  4 */
+0x7e,0x04,0x04,0x04,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x7c,0x40,0x40,0x78,	/* 0x35  5 */
+0x04,0x04,0x08,0x70,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x18,0x20,0x40,0x78,	/* 0x36  6 */
+0x44,0x44,0x44,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x7c,0x04,0x08,0x08,	/* 0x37  7 */
+0x10,0x10,0x20,0x20,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x38,0x44,0x44,0x38,	/* 0x38  8 */
+0x44,0x44,0x44,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x38,0x44,0x44,0x44,	/* 0x39  9 */
+0x3c,0x04,0x08,0x30,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,	/* 0x3a  : */
+0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,	/* 0x3b  ; */
+0x00,0x00,0x30,0x30,0x10,0x20,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x08,0x10,0x20,	/* 0x3c  < */
+0x40,0x20,0x10,0x08,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7c,	/* 0x3d  = */
+0x00,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x20,0x10,0x08,	/* 0x3e  > */
+0x04,0x08,0x10,0x20,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x38,0x44,0x44,0x04,0x08,	/* 0x3f  ? */
+0x10,0x10,0x00,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x38,0x44,0x9a,	/* 0x40  @ */
+0xaa,0xaa,0x9c,0x40,0x38,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x38,0x44,0x82,0x82,0xfe,	/* 0x41  A */
+0x82,0x82,0x82,0x82,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xf8,0x84,0x84,0xfc,0x82,	/* 0x42  B */
+0x82,0x82,0x82,0xfc,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x3c,0x42,0x80,0x80,0x80,	/* 0x43  C */
+0x80,0x80,0x42,0x3c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xf0,0x88,0x84,0x84,0x84,	/* 0x44  D */
+0x84,0x84,0x88,0xf0,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xfe,0x80,0x80,0x80,0xf8,	/* 0x45  E */
+0x80,0x80,0x80,0xfe,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xfe,0x80,0x80,0x80,0xf0,	/* 0x46  F */
+0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x3c,0x42,0x80,0x80,0x80,	/* 0x47  G */
+0x8e,0x82,0x42,0x3c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x82,0x82,0x82,0x82,0xfe,	/* 0x48  H */
+0x82,0x82,0x82,0x82,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x7c,0x10,0x10,0x10,0x10,	/* 0x49  I */
+0x10,0x10,0x10,0x7c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x3e,0x08,0x08,0x08,0x08,	/* 0x4a  J */
+0x08,0x08,0x88,0x70,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x82,0x84,0x88,0x90,0xa0,	/* 0x4b  K */
+0xd0,0x88,0x84,0x82,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,	/* 0x4c  L */
+0x80,0x80,0x80,0xfe,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x82,0xc6,0xaa,0x92,0x82,	/* 0x4d  M */
+0x82,0x82,0x82,0x82,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x82,0xc2,0xa2,0xa2,0x92,	/* 0x4e  N */
+0x8a,0x8a,0x86,0x82,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x38,0x44,0x82,0x82,0x82,	/* 0x4f  O */
+0x82,0x82,0x44,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xfc,0x82,0x82,0x82,0xfc,	/* 0x50  P */
+0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x38,0x44,0x82,0x82,0x82,	/* 0x51  Q */
+0x82,0x82,0x44,0x38,0x10,0x0c,0x00,0x00,
+
+0x00,0x00,0x00,0xfc,0x82,0x82,0x82,0xfc,	/* 0x52  R */
+0x90,0x88,0x84,0x82,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x7c,0x82,0x80,0x80,0x7c,	/* 0x53  S */
+0x02,0x02,0x82,0x7c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xfe,0x10,0x10,0x10,0x10,	/* 0x54  T */
+0x10,0x10,0x10,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x82,0x82,0x82,0x82,0x82,	/* 0x55  U */
+0x82,0x82,0x82,0x7c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x82,0x82,0x44,0x44,0x44,	/* 0x56  V */
+0x28,0x28,0x10,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x82,0x82,0x82,0x92,0x92,	/* 0x57  W */
+0x92,0x92,0xaa,0x44,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x82,0x82,0x44,0x28,0x10,	/* 0x58  X */
+0x28,0x44,0x82,0x82,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x82,0x82,0x44,0x28,0x10,	/* 0x59  Y */
+0x10,0x10,0x10,0x10,0x10,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xfe,0x82,0x04,0x08,0x10,	/* 0x5a  Z */
+0x20,0x40,0x82,0xfe,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x0e,0x08,0x08,0x08,0x08,	/* 0x5b  [ */
+0x08,0x08,0x08,0x08,0x0e,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x40,	/* 0x5c  \ */
+0x20,0x10,0x08,0x04,0x02,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xe0,0x20,0x20,0x20,0x20,	/* 0x5d  ] */
+0x20,0x20,0x20,0x20,0xe0,0x00,0x00,0x00,
+
+0x00,0x10,0x28,0x44,0x00,0x00,0x00,0x00,	/* 0x5e  ^ */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0x5f  _ */
+0x00,0x00,0x00,0x00,0x00,0xfe,0x00,0x00,
+
+0x00,0x40,0x20,0x10,0x00,0x00,0x00,0x00,	/* 0x60  ` */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x78,0x04,	/* 0x61  a */
+0x7c,0x84,0x84,0x7a,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x80,0x80,0x80,0xb8,0xc4,	/* 0x62  b */
+0x82,0x82,0xc4,0xb8,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x3c,0x42,	/* 0x63  c */
+0x80,0x80,0x42,0x3c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x02,0x02,0x02,0x3a,0x46,	/* 0x64  d */
+0x82,0x82,0x46,0x3a,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x3c,0x42,	/* 0x65  e */
+0xfe,0x80,0x40,0x3e,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x0c,0x12,0x10,0x38,0x10,	/* 0x66  f */
+0x10,0x10,0x10,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x7a,0x84,	/* 0x67  g */
+0x84,0x78,0x80,0x7c,0x82,0x7c,0x00,0x00,
+
+0x00,0x00,0x00,0xc0,0x40,0x40,0x5c,0x62,	/* 0x68  h */
+0x42,0x42,0x42,0x42,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x10,0x00,0x00,0x30,0x10,	/* 0x69  i */
+0x10,0x10,0x10,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x10,0x00,0x00,0x30,0x10,	/* 0x6a  j */
+0x10,0x10,0x10,0x10,0x10,0x10,0x60,0x00,
+
+0x00,0x00,0x00,0xc0,0x40,0x40,0x4c,0x50,	/* 0x6b  k */
+0x60,0x50,0x48,0xc6,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x30,0x10,0x10,0x10,0x10,	/* 0x6c  l */
+0x10,0x10,0x10,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0xec,0x92,	/* 0x6d  m */
+0x92,0x92,0x92,0x92,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0xdc,0x62,	/* 0x6e  n */
+0x42,0x42,0x42,0x42,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x44,	/* 0x6f  o */
+0x82,0x82,0x44,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0xb8,0xc4,	/* 0x70  p */
+0x82,0x82,0xc4,0xb8,0x80,0x80,0x80,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x3a,0x46,	/* 0x71  q */
+0x82,0x82,0x46,0x3a,0x02,0x02,0x02,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0xdc,0x62,	/* 0x72  r */
+0x40,0x40,0x40,0x40,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x80,	/* 0x73  s */
+0x7c,0x02,0x82,0x7c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x20,0x20,0x20,0xfc,0x20,	/* 0x74  t */
+0x20,0x20,0x20,0x1c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x84,0x84,	/* 0x75  u */
+0x84,0x84,0x84,0x7a,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0xc6,0x44,	/* 0x76  v */
+0x28,0x28,0x10,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x82,0x92,	/* 0x77  w */
+0x92,0x92,0xaa,0x44,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0xc2,0x24,	/* 0x78  x */
+0x18,0x18,0x24,0x42,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x82,0x82,	/* 0x79  y */
+0x82,0x44,0x28,0x10,0x20,0x40,0x80,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0xfc,0x88,	/* 0x7a  z */
+0x10,0x20,0x44,0xfc,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x06,0x08,0x08,0x08,0x08,	/* 0x7b  { */
+0x10,0x08,0x08,0x08,0x08,0x06,0x00,0x00,
+
+0x00,0x00,0x00,0x38,0x38,0x38,0x38,0x00,	/* 0x7c  | */
+0x38,0x38,0x38,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xc0,0x20,0x20,0x20,0x20,	/* 0x7d  } */
+0x10,0x20,0x20,0x20,0x20,0xc0,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0x7e  ~ */
+0x32,0x4c,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x7c,0x7c,0x7c,0x7c,0x7c,	/* 0x7f  box */
+0x7c,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xa0  space */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x02,0x04,0x08,	/* 0xa1  ! = slant */
+0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x00,	/* 0xa2  " = equivalent */
+0x7c,0x00,0x7c,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x32,0x4c,0x00,0x00,0x00,0x00,	/* 0xa3  # = tilde */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x10,0x30,0x5e,	/* 0xa4  $ = assignment */
+0x80,0x5e,0x30,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x02,0x04,0xfe,	/* 0xa5  % = not equal */
+0x10,0xfe,0x40,0x80,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x10,0x38,0x7c,	/* 0xa6  & = up arrow */
+0x10,0x10,0x10,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x0c,	/* 0xa7  ' = right arrow */
+0xfe,0x0c,0x08,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x10,0x10,0x10,	/* 0xa8  ( = down arrow */
+0x10,0x7c,0x38,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x60,	/* 0xa9  ) = left arrow */
+0xfe,0x60,0x20,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x24,0x18,	/* 0xaa  * = multiply */
+0x18,0x24,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xfe,0x40,0x20,0x10,0x08,	/* 0xab  + = cap sigma */
+0x10,0x20,0x40,0xfe,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x10,0x10,0x28,0x28,	/* 0xac  , = cap delta */
+0x44,0x44,0x82,0xfe,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x44,0x44,	/* 0xad  - = union */
+0x44,0x38,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x44,	/* 0xae  . = intersection */
+0x44,0x44,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x00,	/* 0xaf  / = divide */
+0x7c,0x00,0x10,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x62,0x92,	/* 0xb0  0 = alpha */
+0x94,0x88,0x98,0x66,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x18,0x24,0x44,0x78,	/* 0xb1  1 = beta */
+0x44,0x42,0x42,0x7c,0x40,0x40,0x80,0x00,
+
+0x00,0x00,0x00,0x30,0x48,0x44,0x20,0x30,	/* 0xb2  2 = delta */
+0x48,0x44,0x44,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x40,0x20,0x20,0x10,0x10,	/* 0xb3  3 = lambda */
+0x28,0x28,0x44,0x44,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x24,0x24,	/* 0xb4  4 = micro */
+0x24,0x24,0x24,0x3a,0x20,0x20,0xc0,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x02,0x7c,0xa8,	/* 0xb5  5 = pi */
+0x28,0x28,0x28,0x28,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x0c,0x12,	/* 0xb6  6 = rho */
+0x22,0x22,0x64,0x58,0x40,0x80,0x80,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x3e,0x50,	/* 0xb7  7 = sigma */
+0x88,0x88,0x88,0x70,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x44,0x82,	/* 0xb8  8 = omega */
+0x92,0x92,0x92,0x6c,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x0c,0x30,0xc0,0x30,	/* 0xb9  9 = less than or equal */
+0x0c,0x00,0xfc,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x60,0x18,0x06,0x18,	/* 0xba  : = greater than or equal */
+0x60,0x00,0x7e,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x38,0x44,0x82,0x82,0xfe,	/* 0xbb  ; = cap theta */
+0x82,0x82,0x44,0x38,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x02,0x04,0x08,0x18,0x28,	/* 0xbc  < = left embed */
+0x48,0x28,0x18,0x0c,0x02,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x30,0x48,0x48,0x30,0x00,	/* 0xbd  = = degree */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x80,0x40,0x20,0x30,0x28,	/* 0xbe  > = right embed */
+0x24,0x28,0x30,0x60,0x80,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0xc0,0xa0,0x90,0x48,0x24,	/* 0xbf  ? = arrow */
+0x12,0x24,0x48,0x90,0xa0,0xc0,0x00,0x00,
+
+0x00,0x00,0xfe,0x00,0x00,0x3c,0x42,0x80,	/* 0xc0  @ = center of copyright */
+0x80,0x42,0x3c,0x00,0x00,0xfe,0x00,0x00,
+
+0x00,0x00,0x00,0x28,0x00,0x00,0x00,0x00,	/* 0xc1  A = umlaut */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x7c,0x44,	/* 0xc2  B = box */
+0x44,0x7c,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x48,	/* 0xc3  C = dot product */
+0x48,0x30,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x10,0x38,0x7c,	/* 0xc4  D = diamond */
+0xfe,0x7c,0x38,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x82,0x44,0x28,	/* 0xc5  E = cross product */
+0x10,0x28,0x44,0x82,0x00,0x00,0x00,0x00,
+
+0x00,0x04,0x08,0x10,0x00,0x00,0x00,0x00,	/* 0xc6  F = acute accent */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xc7  G = cedilla */
+0x00,0x00,0x00,0x04,0x08,0x10,0x00,0x00,
+
+0x00,0x44,0x28,0x10,0x00,0x00,0x00,0x00,	/* 0xc8  H = hacek */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x10,0x38,0x7c,	/* 0xc9  I = universal separator */
+0x10,0x7c,0x38,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x10,0x10,0x10,0x10,0x10,	/* 0xca  J = vertical bar */
+0x10,0x10,0x10,0x10,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xcb  K */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xcc  L */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xcd  M */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xce  N */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xcf  O */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd0  P */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd1  Q */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd2  R */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd3  S */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd4  T */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd5  U */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd6  V */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd7  W */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd8  X */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xd9  Y */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xda  Z */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xdb  [ */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xdc  \ */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xdd  ] */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xde  ^ */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	/* 0xdf  _ */
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
+};
+
diff --git a/help.c b/help.c
new file mode 100644
index 0000000..5f43cee
--- /dev/null
+++ b/help.c
@@ -0,0 +1,3367 @@
+#include "help.h"
+#include "screen.h"
+
+/**
+ * Help screen PLATO stream, drawn to page 2
+ */
+padByte help[] =
+  {
+   0x1b,
+   0x02,
+0x1b,
+0x0c,
+0x1b,
+0x12,
+0x1b,
+0xd1,
+0xc0,
+0x50,
+0xc0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0xe2,
+0xc0,
+0xc0,
+0xc0,
+0xc0,
+0x1b,
+0x0c,
+0x1b,
+0x12,
+0x1d,
+0xaf,
+0xf0,
+0xa0,
+0xc0,
+0x1b,
+0x5a,
+0x1b,
+0xd1,
+0xc0,
+0x44,
+0x41,
+0x1d,
+0x21,
+0x60,
+0x22,
+0x50,
+0x1b,
+0x5a,
+0x9f,
+0x1b,
+0x12,
+0x1b,
+0xcc,
+0x1b,
+0xcf,
+0x1b,
+0xca,
+0x4b,
+0xc5,
+0x59,
+0x42,
+0xcf,
+0x41,
+0xd2,
+0x44,
+0xa0,
+0x48,
+0xc5,
+0xcc,
+0x50,
+0x1d,
+0x2e,
+0xf0,
+0xa0,
+0xd8,
+0x1b,
+0x5a,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xcf,
+0xc0,
+0x9f,
+0x1b,
+0x12,
+0x1b,
+0xcc,
+0x1b,
+0x4e,
+0x1b,
+0xca,
+0x50,
+0xcc,
+0x41,
+0xd4,
+0xcf,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xc0,
+0xfc,
+0xcf,
+0xc0,
+0x1b,
+0x12,
+0xd8,
+0x36,
+0xb8,
+0x30,
+0x30,
+0x30,
+0x1d,
+0xf0,
+0x24,
+0x50,
+0x1b,
+0x5a,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xcf,
+0xc0,
+0x9f,
+0x1b,
+0x12,
+0x50,
+0xcc,
+0x41,
+0xd4,
+0xcf,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xc0,
+0xfc,
+0xcf,
+0xc0,
+0x1b,
+0x12,
+0xd8,
+0x36,
+0xb8,
+0x30,
+0x30,
+0x30,
+0x1d,
+0xf0,
+0x28,
+0x50,
+0x1b,
+0x5a,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xcf,
+0xc0,
+0x9f,
+0x1b,
+0x12,
+0x50,
+0xcc,
+0x41,
+0xd4,
+0xcf,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xc0,
+0xfc,
+0xcf,
+0xc0,
+0x1b,
+0x12,
+0xd8,
+0x36,
+0xb8,
+0x30,
+0x30,
+0x30,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xc0,
+0xc0,
+0x1d,
+0x22,
+0x60,
+0xa0,
+0x50,
+0x1b,
+0x12,
+0x60,
+0x24,
+0x48,
+0x2e,
+0xf0,
+0x48,
+0xf0,
+0xa0,
+0x50,
+0x22,
+0x60,
+0x50,
+0x1d,
+0x60,
+0x24,
+0x48,
+0x60,
+0x28,
+0x48,
+0x2e,
+0xf0,
+0x48,
+0xf0,
+0x24,
+0x48,
+0x22,
+0x60,
+0x48,
+0x1d,
+0x60,
+0x28,
+0x48,
+0x60,
+0xac,
+0x48,
+0x2e,
+0xf0,
+0x48,
+0xf0,
+0x28,
+0x48,
+0x22,
+0x60,
+0x48,
+0x1d,
+0x2e,
+0xf0,
+0xa0,
+0x50,
+0xf0,
+0x24,
+0x48,
+0xaf,
+0x60,
+0x48,
+0x60,
+0xa0,
+0x50,
+0x2e,
+0xf0,
+0x50,
+0x1d,
+0xf0,
+0x24,
+0x48,
+0xf0,
+0x28,
+0x48,
+0xaf,
+0x60,
+0x48,
+0x60,
+0x24,
+0x48,
+0x2e,
+0xf0,
+0x48,
+0x1d,
+0xf0,
+0x28,
+0x48,
+0xf0,
+0xac,
+0x48,
+0xaf,
+0x60,
+0x48,
+0x60,
+0x28,
+0x48,
+0x2e,
+0xf0,
+0x48,
+0x1d,
+0x2d,
+0xf0,
+0xa0,
+0xd8,
+0x1b,
+0x5a,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xcf,
+0xc0,
+0x9f,
+0x1b,
+0x12,
+0x41,
+0x4e,
+0x53,
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+0x12,
+0x1b,
+0xc3,
+0x3a,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xc0,
+0xfc,
+0xcf,
+0xc0,
+0x1b,
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+0x4d,
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+0xbe,
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+0x2d,
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+0x1b,
+0x5a,
+0x1b,
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+0xc0,
+0xfc,
+0xff,
+0xff,
+0xff,
+0xff,
+0x9f,
+0x1b,
+0x12,
+0xd4,
+0xd4,
+0x59,
+0xa0,
+0x4b,
+0x65,
+0xf9,
+0xf3,
+0x1d,
+0x2d,
+0xf0,
+0xac,
+0x50,
+0x1b,
+0x5a,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x9f,
+0x1b,
+0x12,
+0xc6,
+0xb1,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xd4,
+0xd4,
+0x59,
+0xa0,
+0x4d,
+0x6f,
+0xe4,
+0x65,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc6,
+0xb2,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0x50,
+0xcc,
+0x41,
+0xd4,
+0xcf,
+0xa0,
+0x4d,
+0x6f,
+0xe4,
+0x65,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc6,
+0xb1,
+0x30,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xd1,
+0xf5,
+0x69,
+0x74,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0x42,
+0xd2,
+0xc5,
+0x41,
+0x4b,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x8d,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0x48,
+0xe1,
+0xee,
+0xe7,
+0xa0,
+0x55,
+0xf0,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc3,
+0xd4,
+0xd2,
+0xcc,
+0x2d,
+0x44,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x8d,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0x44,
+0x69,
+0xe1,
+0x6c,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc3,
+0xd4,
+0xd2,
+0xcc,
+0x2d,
+0x33,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xa0,
+0x8d,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x33,
+0x30,
+0x30,
+0xa0,
+0x42,
+0xe1,
+0xf5,
+0xe4,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc3,
+0xd4,
+0xd2,
+0xcc,
+0x2d,
+0xb1,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xa0,
+0x8d,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xb1,
+0xb2,
+0x30,
+0x30,
+0xa0,
+0x42,
+0xe1,
+0xf5,
+0xe4,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc3,
+0xd4,
+0xd2,
+0xcc,
+0x2d,
+0xb2,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xa0,
+0x8d,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xb2,
+0xb4,
+0x30,
+0x30,
+0xa0,
+0x42,
+0xe1,
+0xf5,
+0xe4,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc3,
+0xd4,
+0xd2,
+0xcc,
+0x2d,
+0x36,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xa0,
+0x8d,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x39,
+0x36,
+0x30,
+0x30,
+0xa0,
+0x42,
+0xe1,
+0xf5,
+0xe4,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc3,
+0xd4,
+0xd2,
+0xcc,
+0x2d,
+0x39,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xa0,
+0x8d,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xb1,
+0x39,
+0xb2,
+0x30,
+0x30,
+0xa0,
+0x42,
+0xe1,
+0xf5,
+0xe4,
+0x8d,
+0x1b,
+0x59,
+0x50,
+0x41,
+0xc0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc3,
+0xd4,
+0xd2,
+0xcc,
+0x2d,
+0xb8,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xa0,
+0x8d,
+0xa0,
+0xa0,
+0xa0,
+0xa0,
+0x33,
+0xb8,
+0xb4,
+0x30,
+0x30,
+0xa0,
+0x42,
+0xe1,
+0xf5,
+0xe4,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc3,
+0xd4,
+0xd2,
+0xcc,
+0x2d,
+0x53,
+0x48,
+0xc9,
+0xc6,
+0xd4,
+0x2d,
+0x44,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xa0,
+0x8d,
+0xa0,
+0xc5,
+0xe4,
+0x69,
+0x74,
+0xa0,
+0x44,
+0x69,
+0xe1,
+0x6c,
+0xa0,
+0x53,
+0x74,
+0x72,
+0x8d,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xc3,
+0xf0,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xc3,
+0xd4,
+0xd2,
+0xcc,
+0x2d,
+0x53,
+0x48,
+0xc9,
+0xc6,
+0xd4,
+0x2d,
+0xc9,
+0xa0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0x12,
+0xa0,
+0x8d,
+0xa0,
+0xc5,
+0xe4,
+0x69,
+0x74,
+0xa0,
+0xc9,
+0xee,
+0x69,
+0x74,
+0xa0,
+0x53,
+0x74,
+0x72,
+0x1b,
+0x59,
+0x50,
+0x41,
+0xc0,   
+0x1b,
+0x03,
+  };
+
+/**
+ * help_init(void) - Initialize and draw help
+ */
+void help_init(void)
+{
+}
diff --git a/help.h b/help.h
new file mode 100644
index 0000000..83638bb
--- /dev/null
+++ b/help.h
@@ -0,0 +1,11 @@
+#ifndef HELP_H
+#define HELP_H
+
+#include "protocol.h"
+
+/**
+ * help_init(void) - Initialize and draw help
+ */
+void help_init(void);
+
+#endif /* HELP_H */
diff --git a/io.c b/io.c
new file mode 100755
index 0000000..67bc34c
--- /dev/null
+++ b/io.c
@@ -0,0 +1,67 @@
+#include "io.h"
+#include "protocol.h"
+#include "terminal.h"
+
+#define true 1
+#define false 0
+
+extern unsigned char trace_active;
+
+void io_init(void)
+{
+}
+
+void io_send_byte(unsigned char b)
+{
+}
+
+void io_main(void)
+{
+}
+
+/**
+ * io_send_string(str,len)
+ * Send string to port.
+ */
+void io_send_string(const char* str, int len)
+{
+}
+
+/**
+ * io_set_baud(int baud) - Set baud rate
+ */
+void io_set_baud(int baud)
+{
+}
+
+/**
+ * io_hang_up(void) - Hang up modem
+ */
+void io_hang_up(void)
+{
+}
+
+/**
+ * io_send_cr(void)
+ */
+void io_send_cr(void)
+{
+}
+
+/**
+ * io_send_dial(void) - Send dial string to modem
+ */
+void io_send_dial(void)
+{
+}
+
+/**
+ * io_send_back_out(void) - send back out
+ */
+void io_send_back_out(void)
+{
+}
+
+void io_done()
+{
+}
diff --git a/io.h b/io.h
new file mode 100755
index 0000000..5da498e
--- /dev/null
+++ b/io.h
@@ -0,0 +1,67 @@
+/**
+ * PLATOTerm64 - A PLATO Terminal for the Commodore 64
+ * Based on Steve Peltz's PAD
+ * 
+ * Author: Thomas Cherryhomes <thom.cherryhomes at gmail dot com>
+ *
+ * io.h - Input/output functions (serial/ethernet)
+ */
+
+#ifndef IO_H
+#define IO_H
+
+#define XON  0x11
+#define XOFF 0x13
+
+/**
+ * io_init() - Set-up the I/O
+ */
+void io_init(void);
+
+/**
+ * io_send_byte(b) - Send specified byte out
+ */
+void io_send_byte(unsigned char b);
+
+/**
+ * io_send_string(str,len)
+ * Send string to port.
+ */
+void io_send_string(const char* str, int len);
+
+/**
+ * io_main() - The IO main loop
+ */
+void io_main(void);
+
+/**
+ * io_set_baud(int baud) - Set baud rate
+ */
+void io_set_baud(int baud);
+
+/**
+ * io_hang_up(void) - Hang up modem
+ */
+void io_hang_up(void);
+
+/**
+ * io_send_cr(void)
+ */
+void io_send_cr(void);
+
+/**
+ * io_send_dial(void) - send dial string
+ */
+void io_send_dial(void);
+
+/**
+ * io_send_back_out(void) - send back out
+ */
+void io_send_back_out(void);
+
+/**
+ * io_done() - Called to close I/O
+ */
+void io_done(void);
+
+#endif /* IO_H */
diff --git a/key.h b/key.h
new file mode 100644
index 0000000..8cfb99a
--- /dev/null
+++ b/key.h
@@ -0,0 +1,400 @@
+/**
+ *
+ * KEY_H generated by mk_ascii_key_h.c
+ */
+
+#include "plato_key.h"
+
+int key_to_pkey[]={
+    PKEY_NOKEY, /* 0x00 NUL */
+    PKEY_NOKEY, /* 0x01 CTRL-A */
+    PKEY_NOKEY, /* 0x02 CTRL-B */
+    PKEY_NOKEY, /* 0x03 CTRL-C */
+    PKEY_NOKEY, /* 0x04 CTRL-D */
+    PKEY_NOKEY, /* 0x05 CTRL-E */
+    PKEY_NOKEY, /* 0x06 CTRL-F */
+    PKEY_NOKEY, /* 0x07 CTRL-G */
+    PKEY_NOKEY, /* 0x08 CTRL-H */
+    PKEY_TAB, /* 0x09 CTRL-I */
+    PKEY_NOKEY, /* 0x0a CTRL-J */
+    PKEY_NOKEY, /* 0x0b CTRL-K */
+    PKEY_NOKEY, /* 0x0c CTRL-L */
+    PKEY_NEXT, /* 0x0d CTRL-M */
+    PKEY_NOKEY, /* 0x0e CTRL-N */
+    PKEY_NOKEY, /* 0x0f CTRL-O */
+    PKEY_NOKEY, /* 0x10 CTRL-P */
+    PKEY_NOKEY, /* 0x11 CTRL-Q */
+    PKEY_NOKEY, /* 0x12 CTRL-R */
+    PKEY_NOKEY, /* 0x13 CTRL-S */
+    PKEY_NOKEY, /* 0x14 CTRL-T */
+    PKEY_NOKEY, /* 0x15 CTRL-U */
+    PKEY_NOKEY, /* 0x16 CTRL-V */
+    PKEY_NOKEY, /* 0x17 CTRL-W */
+    PKEY_NOKEY, /* 0x18 CTRL-X */
+    PKEY_NOKEY, /* 0x19 CTRL-Y */
+    PKEY_NOKEY, /* 0x1a CTRL-Z */
+    PKEY_ASSIGN, /* 0x1b ESC */
+    PKEY_NOKEY, /* 0x1c */
+    PKEY_NOKEY, /* 0x1d */
+    PKEY_NOKEY, /* 0x1e */
+    PKEY_NOKEY, /* 0x1f */
+    PKEY_SPACE, /* 0x20 SPACE */
+    PKEY_EXCLAMATION, /* 0x21 ! */
+    PKEY_QUOTE, /* 0x22 " */
+    PKEY_POUND, /* 0x23 # */
+    PKEY_DOLLAR, /* 0x24 $ */
+    PKEY_PERCENT, /* 0x25 % */
+    PKEY_AMPERSAND, /* 0x26 & */
+    PKEY_APOSTROPHE, /* 0x27 ' */
+    PKEY_PARENTHESIS_LEFT, /* 0x28 ( */
+    PKEY_PARENTHESIS_RIGHT, /* 0x29 ) */
+    PKEY_ASTERISK, /* 0x2a * */
+    PKEY_PLUS, /* 0x2b + */
+    PKEY_COMMA, /* 0x2c , */
+    PKEY_MINUS, /* 0x2d - */
+    PKEY_PERIOD, /* 0x2e . */
+    PKEY_SLASH, /* 0x2f / */
+    PKEY_0, /* 0x30 0 */
+    PKEY_1, /* 0x31 1 */
+    PKEY_2, /* 0x32 2 */
+    PKEY_3, /* 0x33 3 */
+    PKEY_4, /* 0x34 4 */
+    PKEY_5, /* 0x35 5 */
+    PKEY_6, /* 0x36 6 */
+    PKEY_7, /* 0x37 7 */
+    PKEY_8, /* 0x38 8 */
+    PKEY_9, /* 0x39 9 */
+    PKEY_COLON, /* 0x3a : */
+    PKEY_SEMICOLON, /* 0x3b ; */
+    PKEY_LESS_THAN, /* 0x3c < */
+    PKEY_EQUALS, /* 0x3d = */
+    PKEY_GREATER_THAN, /* 0x3e > */
+    PKEY_QUESTION_MARK, /* 0x3f ? */
+    PKEY_AT, /* 0x40 @ */
+    PKEY_A, /* 0x41 A */
+    PKEY_B, /* 0x42 B */
+    PKEY_C, /* 0x43 C */
+    PKEY_D, /* 0x44 D */
+    PKEY_E, /* 0x45 E */
+    PKEY_F, /* 0x46 F */
+    PKEY_G, /* 0x47 G */
+    PKEY_H, /* 0x48 H */
+    PKEY_I, /* 0x49 I */
+    PKEY_J, /* 0x4a J */
+    PKEY_K, /* 0x4b K */
+    PKEY_L, /* 0x4c L */
+    PKEY_M, /* 0x4d M */
+    PKEY_N, /* 0x4e N */
+    PKEY_O, /* 0x4f O */
+    PKEY_P, /* 0x50 P */
+    PKEY_Q, /* 0x51 Q */
+    PKEY_R, /* 0x52 R */
+    PKEY_S, /* 0x53 S */
+    PKEY_T, /* 0x54 T */
+    PKEY_U, /* 0x55 U */
+    PKEY_V, /* 0x56 V */
+    PKEY_W, /* 0x57 W */
+    PKEY_X, /* 0x58 X */
+    PKEY_Y, /* 0x59 Y */
+    PKEY_Z, /* 0x5a Z */
+    PKEY_BRACKET_LEFT, /* 0x5b [ */
+    PKEY_SLASH, /* 0x5c / */
+    PKEY_BRACKET_RIGHT, /* 0x5d ] */
+    PKEY_CIRCUMFLEX, /* 0x5e ^ */
+    PKEY_UNDERSCORE, /* 0x5f _ */
+    PKEY_GRAVE, /* 0x60 ` */
+    PKEY_a, /* 0x61 a */
+    PKEY_b, /* 0x62 b */
+    PKEY_c, /* 0x63 c */
+    PKEY_d, /* 0x64 d */
+    PKEY_e, /* 0x65 e */
+    PKEY_f, /* 0x66 f */
+    PKEY_g, /* 0x67 g */
+    PKEY_h, /* 0x68 h */
+    PKEY_i, /* 0x69 i */
+    PKEY_j, /* 0x6a j */
+    PKEY_k, /* 0x6b k */
+    PKEY_l, /* 0x6c l */
+    PKEY_m, /* 0x6d m */
+    PKEY_n, /* 0x6e n */
+    PKEY_o, /* 0x6f o */
+    PKEY_p, /* 0x70 p */
+    PKEY_q, /* 0x71 q */
+    PKEY_r, /* 0x72 r */
+    PKEY_s, /* 0x73 s */
+    PKEY_t, /* 0x74 t */
+    PKEY_u, /* 0x75 u */
+    PKEY_v, /* 0x76 v */
+    PKEY_w, /* 0x77 w */
+    PKEY_x, /* 0x78 x */
+    PKEY_y, /* 0x79 y */
+    PKEY_z, /* 0x7a z */
+    PKEY_LEFT_CURLY_BRACE, /* 0x7b { */
+    PKEY_BAR, /* 0x7c | */
+    PKEY_RIGHT_CURLY_BRACE, /* 0x7d } */
+    PKEY_TILDE, /* 0x7e ~ */
+    PKEY_ERASE, /* 0x7f DEL */
+};
+
+/* CTRL key mappings, |= 0x80 for shifted ctrl-keys */
+/* HELP is handled by a scancode/shift state override */
+/* NEXT/NEXT1 is handled by a scancode/shift state override */
+int ctrl_key_to_pkey[]={
+    PKEY_NOKEY, /* 0x00 NUL */
+    PKEY_ANS, /* 0x01 CTRL-A */
+    PKEY_BACK, /* 0x02 CTRL-B */
+    PKEY_COPY, /* 0x03 CTRL-C */
+    PKEY_DATA, /* 0x04 CTRL-D */
+    PKEY_EDIT, /* 0x05 CTRL-E */
+    PKEY_FONT, /* 0x06 CTRL-F */
+    PKEY_DIVIDE, /* 0x07 CTRL-G */
+    PKEY_ERASE, /* 0x08 CTRL-H */
+    PKEY_NOKEY, /* 0x09 CTRL-I */
+    PKEY_NOKEY, /* 0x0a CTRL-J */
+    PKEY_NOKEY, /* 0x0b CTRL-K */
+    PKEY_LAB, /* 0x0c CTRL-L */
+    PKEY_NEXT, /* 0x0d CTRL-M */
+    PKEY_NEXT, /* 0x0e CTRL-N */
+    PKEY_BACK, /* 0x0f CTRL-O */
+    PKEY_SUPER, /* 0x10 CTRL-P */
+    PKEY_SQUARE, /* 0x11 CTRL-Q */
+    PKEY_ERASE, /* 0x12 CTRL-R */
+    PKEY_STOP, /* 0x13 CTRL-S */
+    PKEY_TERM, /* 0x14 CTRL-T */
+    PKEY_NOKEY, /* 0x15 CTRL-U */
+    PKEY_NOKEY, /* 0x16 CTRL-V */
+    PKEY_NOKEY, /* 0x17 CTRL-W */
+    PKEY_MULTIPLY, /* 0x18 CTRL-X */
+    PKEY_SUB, /* 0x19 CTRL-Y */
+    PKEY_NOKEY, /* 0x1a CTRL-Z */
+    PKEY_NOKEY, /* 0x1b ESC */
+    PKEY_NOKEY, /* 0x1c */
+    PKEY_NOKEY, /* 0x1d */
+    PKEY_NOKEY, /* 0x1e */
+    PKEY_NOKEY, /* 0x1f */
+    PKEY_BACKSPACE, /* 0x20 SPACE */
+    PKEY_NOKEY, /* 0x21 ! */
+    PKEY_NOKEY, /* 0x22 " */
+    PKEY_NOKEY, /* 0x23 # */
+    PKEY_NOKEY, /* 0x24 $ */
+    PKEY_NOKEY, /* 0x25 % */
+    PKEY_NOKEY, /* 0x26 & */
+    PKEY_NOKEY, /* 0x27 ' */
+    PKEY_NOKEY, /* 0x28 ( */
+    PKEY_NOKEY, /* 0x29 ) */
+    PKEY_NOKEY, /* 0x2a * */
+    PKEY_SIGMA, /* 0x2b + */
+    PKEY_NOKEY, /* 0x2c , */
+    PKEY_DELTA, /* 0x2d - */
+    PKEY_NOKEY, /* 0x2e . */
+    PKEY_NOKEY, /* 0x2f / */
+    PKEY_NOKEY, /* 0x30 0 */
+    PKEY_NOKEY, /* 0x31 1 */
+    PKEY_NOKEY, /* 0x32 2 */
+    PKEY_NOKEY, /* 0x33 3 */
+    PKEY_NOKEY, /* 0x34 4 */
+    PKEY_NOKEY, /* 0x35 5 */
+    PKEY_NOKEY, /* 0x36 6 */
+    PKEY_NOKEY, /* 0x37 7 */
+    PKEY_NOKEY, /* 0x38 8 */
+    PKEY_NOKEY, /* 0x39 9 */
+    PKEY_NOKEY, /* 0x3a : */
+    PKEY_NOKEY, /* 0x3b ; */
+    PKEY_NOKEY, /* 0x3c < */
+    PKEY_NOKEY, /* 0x3d = */
+    PKEY_NOKEY, /* 0x3e > */
+    PKEY_NOKEY, /* 0x3f ? */
+    PKEY_NOKEY, /* 0x40 @ */
+    PKEY_NOKEY, /* 0x41 A */
+    PKEY_NOKEY, /* 0x42 B */
+    PKEY_NOKEY, /* 0x43 C */
+    PKEY_NOKEY, /* 0x44 D */
+    PKEY_NOKEY, /* 0x45 E */
+    PKEY_NOKEY, /* 0x46 F */
+    PKEY_NOKEY, /* 0x47 G */
+    PKEY_NOKEY, /* 0x48 H */
+    PKEY_NOKEY, /* 0x49 I */
+    PKEY_NOKEY, /* 0x4a J */
+    PKEY_NOKEY, /* 0x4b K */
+    PKEY_NOKEY, /* 0x4c L */
+    PKEY_NOKEY, /* 0x4d M */
+    PKEY_NOKEY, /* 0x4e N */
+    PKEY_NOKEY, /* 0x4f O */
+    PKEY_NOKEY, /* 0x50 P */
+    PKEY_NOKEY, /* 0x51 Q */
+    PKEY_NOKEY, /* 0x52 R */
+    PKEY_NOKEY, /* 0x53 S */
+    PKEY_NOKEY, /* 0x54 T */
+    PKEY_NOKEY, /* 0x55 U */
+    PKEY_NOKEY, /* 0x56 V */
+    PKEY_NOKEY, /* 0x57 W */
+    PKEY_NOKEY, /* 0x58 X */
+    PKEY_NOKEY, /* 0x59 Y */
+    PKEY_NOKEY, /* 0x5a Z */
+    PKEY_NOKEY, /* 0x5b [ */
+    PKEY_NOKEY, /* 0x5c / */
+    PKEY_NOKEY, /* 0x5d ] */
+    PKEY_NOKEY, /* 0x5e ^ */
+    PKEY_NOKEY, /* 0x5f _ */
+    PKEY_NOKEY, /* 0x60 ` */
+    PKEY_NOKEY, /* 0x61 a */
+    PKEY_NOKEY, /* 0x62 b */
+    PKEY_NOKEY, /* 0x63 c */
+    PKEY_NOKEY, /* 0x64 d */
+    PKEY_NOKEY, /* 0x65 e */
+    PKEY_NOKEY, /* 0x66 f */
+    PKEY_NOKEY, /* 0x67 g */
+    PKEY_NOKEY, /* 0x68 h */
+    PKEY_NOKEY, /* 0x69 i */
+    PKEY_NOKEY, /* 0x6a j */
+    PKEY_NOKEY, /* 0x6b k */
+    PKEY_NOKEY, /* 0x6c l */
+    PKEY_NOKEY, /* 0x6d m */
+    PKEY_NOKEY, /* 0x6e n */
+    PKEY_NOKEY, /* 0x6f o */
+    PKEY_NOKEY, /* 0x70 p */
+    PKEY_NOKEY, /* 0x71 q */
+    PKEY_NOKEY, /* 0x72 r */
+    PKEY_NOKEY, /* 0x73 s */
+    PKEY_NOKEY, /* 0x74 t */
+    PKEY_NOKEY, /* 0x75 u */
+    PKEY_NOKEY, /* 0x76 v */
+    PKEY_NOKEY, /* 0x77 w */
+    PKEY_NOKEY, /* 0x78 x */
+    PKEY_NOKEY, /* 0x79 y */
+    PKEY_NOKEY, /* 0x7a z */
+    PKEY_NOKEY, /* 0x7b { */
+    PKEY_NOKEY, /* 0x7c | */
+    PKEY_NOKEY, /* 0x7d } */
+    PKEY_NOKEY, /* 0x7e ~ */
+    PKEY_NOKEY, /* 0x7f DEL */
+    PKEY_NOKEY, /* 0x80 */
+    PKEY_ANS, /* 0x81 */
+    PKEY_BACK1, /* 0x82 */
+    PKEY_COPY1, /* 0x83 */
+    PKEY_DATA1, /* 0x84 */
+    PKEY_EDIT1, /* 0x85 */
+    PKEY_FONT, /* 0x86 */
+    PKEY_INTERSECT, /* 0x87 */
+    PKEY_HELP1, /* 0x88 */
+    PKEY_NOKEY, /* 0x89 */
+    PKEY_NOKEY, /* 0x8A */
+    PKEY_NOKEY, /* 0x8B */
+    PKEY_LAB1, /* 0x8C */
+    PKEY_MICRO, /* 0x8D */
+    PKEY_NEXT1, /* 0x8E */
+    PKEY_NOKEY, /* 0x8F */
+    PKEY_SUPER1, /* 0x90 */
+    PKEY_ACCESS, /* 0x91 */
+    PKEY_ERASE1, /* 0x92 */
+    PKEY_STOP1, /* 0x93 */
+    PKEY_TERM, /* 0x94 */
+    PKEY_NOKEY, /* 0x95 */
+    PKEY_NOKEY, /* 0x96 */
+    PKEY_NOKEY, /* 0x97 */
+    PKEY_NOKEY, /* 0x98 */
+    PKEY_SUB1, /* 0x99 */
+    PKEY_NOKEY, /* 0x9A */
+    PKEY_NOKEY, /* 0x9B */
+    PKEY_NOKEY, /* 0x9C */
+    PKEY_NOKEY, /* 0x9D */
+    PKEY_NOKEY, /* 0x9E */
+    PKEY_NOKEY, /* 0x9F */
+    PKEY_NOKEY, /* 0xA0 */
+    PKEY_NOKEY, /* 0xA1 */
+    PKEY_NOKEY, /* 0xA2 */
+    PKEY_NOKEY, /* 0xA3 */
+    PKEY_NOKEY, /* 0xA4 */
+    PKEY_NOKEY, /* 0xA5 */
+    PKEY_NOKEY, /* 0xA6 */
+    PKEY_NOKEY, /* 0xA7 */
+    PKEY_NOKEY, /* 0xA8 */
+    PKEY_NOKEY, /* 0xA9 */
+    PKEY_NOKEY, /* 0xAA */
+    PKEY_NOKEY, /* 0xAB */
+    PKEY_NOKEY, /* 0xAC */
+    PKEY_NOKEY, /* 0xAD */
+    PKEY_NOKEY, /* 0xAE */
+    PKEY_NOKEY, /* 0xAF */
+    PKEY_NOKEY, /* 0xB0 */
+    PKEY_NOKEY, /* 0xB1 */
+    PKEY_NOKEY, /* 0xB2 */
+    PKEY_NOKEY, /* 0xB3 */
+    PKEY_NOKEY, /* 0xB4 */
+    PKEY_NOKEY, /* 0xB5 */
+    PKEY_NOKEY, /* 0xB6 */
+    PKEY_NOKEY, /* 0xB7 */
+    PKEY_NOKEY, /* 0xB8 */
+    PKEY_NOKEY, /* 0xB9 */
+    PKEY_NOKEY, /* 0xBA */
+    PKEY_NOKEY, /* 0xBB */
+    PKEY_NOKEY, /* 0xBC */
+    PKEY_NOKEY, /* 0xBD */
+    PKEY_NOKEY, /* 0xBE */
+    PKEY_NOKEY, /* 0xBF */
+    PKEY_NOKEY, /* 0xC0 */
+    PKEY_NOKEY, /* 0xC1 */
+    PKEY_NOKEY, /* 0xC2 */
+    PKEY_NOKEY, /* 0xC3 */
+    PKEY_NOKEY, /* 0xC4 */
+    PKEY_NOKEY, /* 0xC5 */
+    PKEY_NOKEY, /* 0xC6 */
+    PKEY_NOKEY, /* 0xC7 */
+    PKEY_NOKEY, /* 0xC8 */
+    PKEY_NOKEY, /* 0xC9 */
+    PKEY_NOKEY, /* 0xCA */
+    PKEY_NOKEY, /* 0xCB */
+    PKEY_NOKEY, /* 0xCC */
+    PKEY_NOKEY, /* 0xCD */
+    PKEY_NOKEY, /* 0xCE */
+    PKEY_NOKEY, /* 0xCF */
+    PKEY_NOKEY, /* 0xD0 */
+    PKEY_NOKEY, /* 0xD1 */
+    PKEY_NOKEY, /* 0xD2 */
+    PKEY_NOKEY, /* 0xD3 */
+    PKEY_NOKEY, /* 0xD4 */
+    PKEY_NOKEY, /* 0xD5 */
+    PKEY_NOKEY, /* 0xD6 */
+    PKEY_NOKEY, /* 0xD7 */
+    PKEY_NOKEY, /* 0xD8 */
+    PKEY_NOKEY, /* 0xD9 */
+    PKEY_NOKEY, /* 0xDA */
+    PKEY_NOKEY, /* 0xDB */
+    PKEY_NOKEY, /* 0xDC */
+    PKEY_NOKEY, /* 0xDD */
+    PKEY_NOKEY, /* 0xDE */
+    PKEY_NOKEY, /* 0xDF */
+    PKEY_NOKEY, /* 0xE0 */
+    PKEY_NOKEY, /* 0xE1 */
+    PKEY_NOKEY, /* 0xE2 */
+    PKEY_NOKEY, /* 0xE3 */
+    PKEY_NOKEY, /* 0xE4 */
+    PKEY_NOKEY, /* 0xE5 */
+    PKEY_NOKEY, /* 0xE6 */
+    PKEY_NOKEY, /* 0xE7 */
+    PKEY_NOKEY, /* 0xE8 */
+    PKEY_NOKEY, /* 0xE9 */
+    PKEY_NOKEY, /* 0xEA */
+    PKEY_NOKEY, /* 0xEB */
+    PKEY_NOKEY, /* 0xEC */
+    PKEY_NOKEY, /* 0xED */
+    PKEY_NOKEY, /* 0xEE */
+    PKEY_NOKEY, /* 0xEF */
+    PKEY_NOKEY, /* 0xF0 */
+    PKEY_NOKEY, /* 0xF1 */
+    PKEY_NOKEY, /* 0xF2 */
+    PKEY_NOKEY, /* 0xF3 */
+    PKEY_NOKEY, /* 0xF4 */
+    PKEY_NOKEY, /* 0xF5 */
+    PKEY_NOKEY, /* 0xF6 */
+    PKEY_NOKEY, /* 0xF7 */
+    PKEY_NOKEY, /* 0xF8 */
+    PKEY_NOKEY, /* 0xF9 */
+    PKEY_NOKEY, /* 0xFA */
+    PKEY_NOKEY, /* 0xFB */
+    PKEY_NOKEY, /* 0xFC */
+    PKEY_NOKEY, /* 0xFD */
+    PKEY_NOKEY, /* 0xFE */
+    PKEY_NOKEY, /* 0xFF */
+};
+
diff --git a/keyboard.c b/keyboard.c
new file mode 100755
index 0000000..998e524
--- /dev/null
+++ b/keyboard.c
@@ -0,0 +1,26 @@
+#include "keyboard.h"
+#include "key.h"
+#include "protocol.h"
+#include "io.h"
+#include "screen.h"
+#include "trace.h"
+
+#define true 1
+#define false 0
+
+extern unsigned char running;
+extern unsigned char help_active;
+extern char tmp[64];
+
+void keyboard_out(int platoKey)
+{
+}
+
+void keyboard_main(void)
+{
+}
+
+void keyboard_out_tty(int ch)
+{
+}
+
diff --git a/keyboard.h b/keyboard.h
new file mode 100755
index 0000000..3c9b71b
--- /dev/null
+++ b/keyboard.h
@@ -0,0 +1,31 @@
+/**
+ * PLATOTerm64 - A PLATO Terminal for the Commodore 64
+ * Based on Steve Peltz's PAD
+ * 
+ * Author: Thomas Cherryhomes <thom.cherryhomes at gmail dot com>
+ *
+ * keyboard.h - Keyboard functions
+ */
+
+#ifndef KEYBOARD_H
+#define KEYBOARD_H
+
+/**
+ * keyboard_out - If platoKey < 0x7f, pass off to protocol
+ * directly. Otherwise, platoKey is an access key, and the
+ * ACCESS key must be sent, followed by the particular
+ * access key from PTAT_ACCESS.
+ */
+void keyboard_out(int platoKey);
+
+/**
+ * keyboard_main - Handle the keyboard presses
+ */
+void keyboard_main(void);
+
+/**
+ * keyboard_out_tty - keyboard output to serial I/O in TTY mode
+ */
+void keyboard_out_tty(int ch);
+
+#endif
diff --git a/main.c b/main.c
new file mode 100755
index 0000000..4a7d1a7
--- /dev/null
+++ b/main.c
@@ -0,0 +1,38 @@
+#include "protocol.h"
+#include "screen.h"
+#include "io.h"
+#include "terminal.h"
+#include "keyboard.h"
+#include "touch.h"
+#include "splash.h"
+#include "help.h"
+
+#define true 1
+#define false 0
+
+unsigned char already_started=false;
+unsigned char running=false;
+
+void main(void)
+{
+  screen_init();
+  touch_init();
+  help_init();
+  NoEcho=padT;
+  ShowPLATO(splash,sizeof(splash));
+  NoEcho=padF;
+  terminal_initial_position();
+  io_init();
+  running=true;
+  screen_show_dial();
+  screen_greeting();
+  while (running==true)
+    {
+      keyboard_main();
+      io_main();
+      touch_main();
+    }
+  io_done();
+  touch_done();
+  screen_done();
+}
diff --git a/plato_key.h b/plato_key.h
new file mode 100644
index 0000000..d32c9f9
--- /dev/null
+++ b/plato_key.h
@@ -0,0 +1,252 @@
+/**
+ * plato_key.h
+ * PLATO specific key mappings
+ * used by key.h
+ * this define table is ordered as in s0ascers document.
+ */
+
+#ifndef PLATO_KEY_H
+#define PLATO_KEY_H
+
+#define PKEY_a 0x41
+#define PKEY_A 0x61
+#define PKEY_b 0x42
+#define PKEY_B 0x62
+#define PKEY_c 0x43
+#define PKEY_C 0x63
+#define PKEY_d 0x44
+#define PKEY_D 0x64
+#define PKEY_e 0x45
+#define PKEY_E 0x65
+#define PKEY_f 0x46
+#define PKEY_F 0x66
+#define PKEY_g 0x47
+#define PKEY_G 0x67
+#define PKEY_h 0x48
+#define PKEY_H 0x68
+#define PKEY_i 0x49
+#define PKEY_I 0x69
+#define PKEY_j 0x4a
+#define PKEY_J 0x6a
+#define PKEY_k 0x4b
+#define PKEY_K 0x6b
+#define PKEY_l 0x4c
+#define PKEY_L 0x6C
+#define PKEY_m 0x4d
+#define PKEY_M 0x6d
+#define PKEY_n 0x4e
+#define PKEY_N 0x6e
+#define PKEY_o 0x4f
+#define PKEY_O 0x6f
+#define PKEY_p 0x50
+#define PKEY_P 0x70
+#define PKEY_q 0x51
+#define PKEY_Q 0x71
+#define PKEY_r 0x52
+#define PKEY_R 0x72
+#define PKEY_s 0x53
+#define PKEY_S 0x73
+#define PKEY_t 0x54
+#define PKEY_T 0x74
+#define PKEY_u 0x55
+#define PKEY_U 0x75
+#define PKEY_v 0x56
+#define PKEY_V 0x76
+#define PKEY_w 0x57
+#define PKEY_W 0x77
+#define PKEY_x 0x58
+#define PKEY_X 0x78
+#define PKEY_y 0x59
+#define PKEY_Y 0x79
+#define PKEY_z 0x5a
+#define PKEY_Z 0x7A
+#define PKEY_0 0x00
+#define PKEY_LESS_THAN 0x20
+#define PKEY_1 0x01
+#define PKEY_GREATER_THAN 0x21
+#define PKEY_2 0x02
+#define PKEY_BRACKET_LEFT 0x22
+#define PKEY_3 0x03
+#define PKEY_BRACKET_RIGHT 0x23
+#define PKEY_4 0x04
+#define PKEY_DOLLAR 0x24
+#define PKEY_5 0x05
+#define PKEY_PERCENT 0x25
+#define PKEY_6 0x06
+#define PKEY_UNDERSCORE 0x26
+#define PKEY_7 0x07
+#define PKEY_APOSTROPHE 0x27
+#define PKEY_8 0x08
+#define PKEY_ASTERISK 0x28
+#define PKEY_9 0x09
+#define PKEY_PARENTHESIS_LEFT 0x29
+#define PKEY_EQUALS 0x5B
+#define PKEY_PARENTHESIS_RIGHT 0x7B
+#define PKEY_PLUS 0x0E
+#define PKEY_SIGMA 0x2E
+#define PKEY_ASSIGN 0x0D
+#define PKEY_SHIFT 0x2D
+#define PKEY_MINUS 0x0F
+#define PKEY_DELTA 0x2F
+#define PKEY_DIVIDE 0x0B
+#define PKEY_INTERSECT 0x2B
+#define PKEY_MULTIPLY 0x0A
+#define PKEY_UNION 0x2A
+#define PKEY_SEMICOLON 0x5c
+#define PKEY_COLON 0x7c
+#define PKEY_PERIOD 0x5e
+#define PKEY_EXCLAMATION 0x7e
+#define PKEY_COMMA 0x5f
+#define PKEY_QUOTE 0x7f
+#define PKEY_SLASH 0x5d
+#define PKEY_QUESTION_MARK 0x7d
+#define PKEY_SUPER 0x10
+#define PKEY_SUPER1 0x30
+#define PKEY_SUB 0x11
+#define PKEY_SUB1 0x31
+#define PKEY_ANS 0x12
+#define PKEY_TERM 0x32
+#define PKEY_COPY 0x1B
+#define PKEY_COPY1 0x3B
+#define PKEY_TAB 0x0c
+#define PKEY_CR 0x2c
+#define PKEY_ERASE 0x13
+#define PKEY_ERASE1 0x33
+#define PKEY_MICRO 0x14
+#define PKEY_FONT 0x34
+#define PKEY_HELP 0x15
+#define PKEY_HELP1 0x35
+#define PKEY_SQUARE 0x1C
+#define PKEY_ACCESS 0x3C
+#define PKEY_NEXT 0x16
+#define PKEY_NEXT1 0x36
+#define PKEY_EDIT 0x17
+#define PKEY_EDIT1 0x37
+#define PKEY_BACK 0x18
+#define PKEY_BACK1 0x38
+#define PKEY_LAB 0x1D
+#define PKEY_LAB1 0x3D
+#define PKEY_DATA 0x19
+#define PKEY_DATA1 0x39
+#define PKEY_STOP 0x1a
+#define PKEY_STOP1 0x3a
+#define PKEY_SPACE 0x40
+#define PKEY_BACKSPACE 0x60
+#define PKEY_PRINT 0x1F
+#define PKEY_PRINT1 0x3F
+#define PKEY_NOKEY 0xFF /* no key mapping */
+
+/* The following keys require an ACCESS key combination */
+#define PKEY_ALPHA 0x80
+#define PKEY_BETA 0x81
+#define PKEY_CEDILLA 0x82
+#define PKEY_LOWERCASE_DELTA 0x83
+#define PKEY_ACUTE_ACCENT 0x84
+#define PKEY_LOWERCASE_AE 0x85
+#define PKEY_LOWERCASE_OE 0x86
+#define PKEY_LOWERCASE_A_WITH_RING 0x87
+#define PKEY_LOWERCASE_A_WITH_DIAERESIS 0x88
+#define PKEY_LAMBDA 0x89
+#define PKEY_MU 0x8A
+#define PKEY_TILDE 0x8B
+#define PKEY_DEGREE 0x8C
+#define PKEY_PI 0x8D
+#define PKEY_GRAVE 0x8E
+#define PKEY_RHO 0x8F
+#define PKEY_LOWERCASE_SIGMA 0x90
+#define PKEY_THETA 0x91
+#define PKEY_DIARESIS 0x92
+#define PKEY_HACEK 0x93
+#define PKEY_CAPITAL_PI 0x94
+#define PKEY_CIRCUMFLEX 0x95
+#define PKEY_LEFT_EMBED 0x96
+#define PKEY_RIGHT_EMBED 0x97
+#define PKEY_AT 0x98
+#define PKEY_ARROW 0x99
+#define PKEY_AMPERSAND 0x9A
+#define PKEY_INTERPUNCT 0x9B
+#define PKEY_LOWER_TILDE 0x9C
+#define PKEY_DELIMITER 0x9D
+#define PKEY_BACKSLASH 0x9E
+#define PKEY_NOT_EQUAL 0x9F
+#define PKEY_LOWERCASE_O_WITH_DIARESIS 0xA0
+#define PKEY_LEFT_ARROW 0xA1
+#define PKEY_DOWN_ARROW 0xA2
+#define PKEY_RIGHT_ARROW 0xA3
+#define PKEY_UP_ARROW 0xA4
+#define PKEY_COPYRIGHT 0xA5
+#define PKEY_DIAMOND 0xA6
+#define PKEY_UPPERCASE_AE 0xA7
+#define PKEY_UPPERCASE_OE 0xA8
+#define PKEY_BAR 0xA9
+#define PKEY_UPPERCASE_A_WITH_RING 0xAA
+#define PKEY_UPPERCASE_A_WITH_DIAERESIS 0xAB
+#define PKEY_ACCESS_SQUARE 0xAC
+#define PKEY_UPPERCASE_O_WITH_DIARESIS 0xAD
+#define PKEY_LESS_THAN_OR_EQUAL 0xAE
+#define PKEY_GREATER_THAN_OR_EQUAL 0xAF
+#define PKEY_LEFT_CURLY_BRACE 0xB0
+#define PKEY_RIGHT_CURLY_BRACE 0xB1
+#define PKEY_POUND 0xB2
+#define PKEY_BIG_CROSS 0xB3
+#define PKEY_EQUIVALENT 0xB4
+
+/* ACCESS Key combinations. */
+static const unsigned char ACCESS_KEYS[] = {
+  PKEY_a, /* 0x80 a ɑ alpha */ 
+  PKEY_B, /* 0x81 b ß beta */
+  PKEY_c, /* 0x82 c cedilla */
+  PKEY_d, /* 0x83 d δ delta */
+  PKEY_e, /* 0x84 e ' acute accent */
+  PKEY_g, /* 0x85 g æ ae */
+  PKEY_h, /* 0x86 h oe oe */
+  PKEY_j, /* 0x87 j å a with ring */
+  PKEY_k, /* 0x88 k ä a with diaeresis */
+  PKEY_l, /* 0x89 l ƛ lambda */
+  PKEY_m, /* 0x8A m μ mu */
+  PKEY_n, /* 0x8B n ~ tilde */
+  PKEY_o, /* 0x8C o ° degree */
+  PKEY_p, /* 0x8D p π pi */
+  0x51, /* 0x8E q ` grave */
+  PKEY_r, /* 0x8F r ρ rho */
+  PKEY_s, /* 0x90 s σ sigma */
+  PKEY_t, /* 0x91 t θ theta */
+  PKEY_u, /* 0x92 u ¨ diaeresis */
+  PKEY_v, /* 0x93 v hacek (upside down circumflex) */
+  PKEY_w, /* 0x94 w ϖ capital pi */
+  PKEY_x, /* 0x95 x ^ circumflex */
+  PKEY_0, /* 0x96 0 l-embed */
+  PKEY_1, /* 0x97 1 r-embed */
+  PKEY_5, /* 0x98 5 @ */
+  PKEY_6, /* 0x99 6 arrow */
+  PKEY_PLUS, /* 0x9a + & */
+  0x26, /* 0x9b & interpunct */
+  PKEY_COLON, /* 0x9c : ~ lower tilde */
+  0x5f, /* 0x9d , delimiter */
+  PKEY_SLASH, /* 0x9e / \ */
+  PKEY_EQUALS, /* 0x9f = not equal */
+  PKEY_y, /* 0xA0 y ö */
+  0x61, /* 0xA1 A left arrow */
+  0x78, /* 0xA2 X down arrow */
+  0x64, /* 0xA3 D right arrow */
+  0x77, /* 0xA4 W up arrow */
+  0x63, /* 0xA5 C © */
+  0x66, /* 0xA6 F ♦ */
+  0x67, /* 0xA7 G Æ */
+  0x68, /* 0xA8 H OE */
+  0x69, /* 0xA9 I | */
+  0x6A, /* 0xAA J Å */
+  0x6B, /* 0xAB K Ä */
+  0x6F, /* 0xAC O SQUARE */
+  0x79, /* 0xAD Y Ö */
+  0x20, /* 0xAE < ≤ */
+  0x21, /* 0xAF > ≥ */
+  0x5B, /* 0xB0 [ { */
+  PKEY_SLASH, /* 0xB1 ] } */
+  0x24, /* 0xB2 $ # */
+  0x9a, /* 0xB3 & big cross */
+  0x7B  /* 0xB4 EQUIVALENT */
+};
+
+#endif /* PLATO_KEY_H */
+
diff --git a/protocol.c b/protocol.c
new file mode 100755
index 0000000..e676580
--- /dev/null
+++ b/protocol.c
@@ -0,0 +1,987 @@
+/**
+ * PLATOTerm64 - A PLATO Terminal for the Commodore 64
+ * Based on Steve Peltz's PAD
+ * 
+ * Author: Thomas Cherryhomes <thom.cherryhomes at gmail dot com>
+ * This file written by Steve Peltz. Copyright notice preserved.
+ * and this code has been used with permission, and can be considered
+ * public domain.
+ *
+ * protocol.c - Protocol decoder functions 
+ */
+
+/* Copyright (c) 1990 by Steve Peltz */
+
+#include "protocol.h"
+
+#define true 1
+#define false 0
+
+#define	BSIZE	64
+
+static padBool EscFlag;		/* Currently in an escape sequence */
+static Mode PMode,		/* Mode */
+  CMode;			/* Command */
+static unsigned short SubMode;	/* Block/Line modes */
+static DataType PType,		/* Mode type */
+  CType;			/* Current type */
+static unsigned short Phase;		/* Phase of current type */
+static padWord theWord;		/* Data received for various data types */
+static padByte theChar;
+static padByte rawChar;
+static padByte lastChar;
+static padRGB theColor;
+static unsigned short LowX,		/* Previous coordinates received */
+  HiX, LowY, HiY;
+static padPt CurCoord;		/* Current coordinate */
+static padWord Margin;		/* Margin for CR */
+static padWord MemAddr;		/* Load address for program data */
+static unsigned short CharCnt;	/* Current count for loading chars */
+static charData Char;		/* Character data */
+static padByte charBuff[BSIZE];
+static unsigned short charCount;	/* Count of characters currently buffered */
+static padPt charCoord;
+
+extern unsigned char terminal_get_features(void);
+extern unsigned char terminal_get_type(void);
+extern unsigned char terminal_get_subtype(void);
+extern unsigned char terminal_get_load_file(void);
+extern unsigned char terminal_get_configuration(void);
+extern unsigned short terminal_get_char_address(void);
+extern padByte terminal_mem_read(padWord addr);
+extern padByte terminal_ext_in(void);
+
+extern void screen_wait(void);
+extern void screen_beep(void);
+extern void io_send_byte(unsigned char b);
+extern void screen_block_draw(padPt* Coord1, padPt* Coord2);
+extern void screen_dot_draw(padPt* Coord);
+extern void screen_line_draw(padPt* Coord1, padPt* Coord2);
+extern void screen_char_draw(padPt* Coord, unsigned char* ch, unsigned char count);
+extern void screen_tty_char(padByte theChar);
+extern void screen_foreground(padRGB* theColor);
+extern void screen_background(padRGB* theColor);
+extern void screen_paint(padPt* Coord);
+extern void terminal_mem_load(padWord addr, padWord value);
+extern void terminal_char_load(padWord charnum, charData theChar);
+extern void terminal_mode_5(padWord value);
+extern void terminal_mode_6(padWord value);
+extern void terminal_mode_7(padWord value);
+extern void touch_allow(padBool allow);
+extern void terminal_ext_allow(padBool allow);
+extern void terminal_set_ext_in(padWord device);
+extern void terminal_set_ext_out(padWord device);
+extern void terminal_ext_out(padByte value);
+extern void screen_clear(void);
+extern void terminal_set_tty(void);
+extern void terminal_set_plato(void);
+
+#ifdef PROTOCOL_DEBUG
+extern void log(const char* format, ...);
+#endif
+
+static padByte PTAT0[128] = {	/* PLATO to ASCII lookup table */
+  0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,	/* original mapping */
+  0x38, 0x39, 0x26, 0x60, 0x0a, 0x5e, 0x2b, 0x2d,
+  0x13, 0x04, 0x07, 0x08, 0x7b, 0x0b, 0x0d, 0x1a,
+  0x02, 0x12, 0x01, 0x03, 0x7d, 0x0c, 0x83, 0x85,
+  0x3c, 0x3e, 0x5b, 0x5d, 0x24, 0x25, 0x5f, 0x7c,
+  0x2a, 0x28, 0x40, 0x27, 0x1c, 0x5c, 0x23, 0x7e,
+  0x17, 0x05, 0x14, 0x19, 0x7f, 0x09, 0x1e, 0x18,
+  0x0e, 0x1d, 0x11, 0x16, 0x00, 0x0f, 0x87, 0x88,
+  0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+  0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+  0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+  0x78, 0x79, 0x7a, 0x3d, 0x3b, 0x2f, 0x2e, 0x2c,
+  0x1f, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+  0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+  0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+  0x58, 0x59, 0x5a, 0x29, 0x3a, 0x3f, 0x21, 0x22
+};
+
+static padByte PTAT1[128] = {
+  0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,	/* flow control mapping */
+  0x38, 0x39, 0x26, 0x60, 0x09, 0x5e, 0x2b, 0x2d,
+  0x17, 0x04, 0x07, 0x08, 0x7b, 0x0b, 0x0d, 0x1a,
+  0x02, 0x12, 0x01, 0x03, 0x7d, 0x0c, 0x83, 0x85,
+  0x3c, 0x3e, 0x5b, 0x5d, 0x24, 0x25, 0x5f, 0x27,
+  0x2a, 0x28, 0x40, 0x7c, 0x1c, 0x5c, 0x23, 0x7e,
+  0x97, 0x84, 0x14, 0x19, 0x7f, 0x0a, 0x1e, 0x18,
+  0x0e, 0x1d, 0x05, 0x16, 0x9d, 0x0f, 0x87, 0x88,
+  0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+  0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+  0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+  0x78, 0x79, 0x7a, 0x3d, 0x3b, 0x2f, 0x2e, 0x2c,
+  0x1f, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+  0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+  0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+  0x58, 0x59, 0x5a, 0x29, 0x3a, 0x3f, 0x21, 0x22
+};
+
+/*	externally referenced variables	*/
+
+padPt PLATOSize={512,512};	/* Logical screen size */
+CharMem CurMem;			/* Font to plot in */
+padBool TTY,			/* TTY mode */
+  FlowControl,			/* Flow control on */
+  ModeBold,			/* Character plotting conditions */
+  Rotate, Reverse;
+DispMode CurMode;		/* Current PLATO plotting mode */
+padBool FastText;               /* Indicate to main program if text optimizations can be done. */
+padBool NoEcho=padF;
+
+/*----------------------------------------------*
+ *	InitPAD, InitTTY, InitPLATO		*
+ *						*
+ *	Called to initialize PAD variables.	*
+ *	Calls back to external routines to	*
+ *	set up proper plotting conditions.	*
+ *----------------------------------------------*/
+
+void
+InitPAD (void)
+{
+  InitTTY ();
+}
+
+void
+InitTTY (void)
+{
+  charCount = 0;
+  EscFlag = false;
+  TTY = true;
+  FastText = true;
+  FlowControl = false;
+  terminal_set_tty();
+}
+
+void
+InitPLATO (void)
+{
+  if (TTY)
+    InitPLATOx ();
+}
+
+void
+InitPLATOx (void)
+{
+  charCount = 0;
+  EscFlag = false;
+  TTY = false;
+  terminal_set_plato ();
+  SetMode (mAlpha, tByte);
+  LowX = 0;
+  HiX = 0;
+  LowY = 0;
+  HiY = 0;
+  CurCoord.x = 0;
+  CurCoord.y = 0;
+  MemAddr = 0;
+  CharCnt = 0;
+  Margin = 0;
+  ModeBold = false;
+  Rotate = false;
+  Reverse = false;
+  FastText = true;
+  CurMem = M0;
+  CurMode = ModeRewrite;
+}
+
+
+/*----------------------------------------------*
+ *	Key					*
+ *						*
+ *	Send a 10-bit internal key. If a keyset	*
+ *	key, translate, else send as escaped	*
+ *	sequence.				*
+ *----------------------------------------------*/
+
+void
+Key (padWord theKey)
+{
+  if (theKey >> 7)
+    {
+      io_send_byte (0x1b);
+      io_send_byte (0x40 | (theKey & 0x3f));
+      io_send_byte (0x60 | ((theKey >> 6) & 0x0f));
+    }
+  else
+    {
+
+      if (FlowControl == 0)
+	theKey = PTAT0[theKey];
+      else
+	theKey = PTAT1[theKey];
+
+      if (theKey & 0x80)
+	{
+	  io_send_byte (0x1b);
+	  io_send_byte (theKey & 0x7f);
+	}
+      else
+	io_send_byte (theKey);
+    }
+}
+
+/*----------------------------------------------*
+ *	Touch					*
+ *						*
+ *	Send a touch key (01yyyyxxxx).		*
+ *----------------------------------------------*/
+
+void	Touch(padPt* where)
+{
+  io_send_byte(0x1b);
+  io_send_byte(0x1f);
+  io_send_byte(0x40 + (where->x & 0x1f));
+  io_send_byte(0x40 + ((where->x >> 5) & 0x0f));
+  io_send_byte(0x40 + (where->y & 0x1f));
+  io_send_byte(0x40 + ((where->y >> 5) & 0x0f));
+  
+  Key(0x100 | ((where->x >> 1) & 0xF0) |
+      ((where->y >> 5) & 0x0F));
+}
+
+/*----------------------------------------------*
+ *	Ext					*
+ *						*
+ *	Send an external key (10xxxxxxxx).	*
+ *----------------------------------------------*/
+
+void
+Ext (padWord theKey)
+{
+  Key (0x200 | (theKey & 0xFF));
+}
+
+
+/*----------------------------------------------*
+ *	Echo					*
+ *						*
+ *	Send an echo key (001xxxxxx).		*
+ *----------------------------------------------*/
+
+void
+Echo (padWord theKey)
+{
+  if (NoEcho==padT)
+    return;
+  Key (0x080 | theKey);
+}
+
+
+
+/*----------------------------------------------*
+ *	SetCommand, SetMode			*
+ *						*
+ *	Set state machine variables.		*
+ *----------------------------------------------*/
+
+void
+SetCommand (Mode theMode, DataType theType)
+{
+  CMode = theMode;
+  CType = theType;
+  Phase = 0;
+}
+
+void
+SetMode (Mode theMode, DataType theType)
+{
+  PMode = theMode;
+  PType = theType;
+  SubMode = 0;
+  SetCommand (theMode, theType);
+}
+
+
+/*----------------------------------------------*
+ *	FixXY					*
+ *						*
+ *	Move location by offset, then make sure	*
+ *	it is still on the screen.		*
+ *----------------------------------------------*/
+
+void
+FixXY (short DX, short DY)
+{
+  if (ModeBold)
+    {
+      DX = DX * 2;
+      DY = DY * 2;
+    }
+  if (Reverse)
+    DX = -DX;
+  if (Rotate)
+    {
+      CurCoord.x = CurCoord.x + DY;
+      CurCoord.y = CurCoord.y + DX;
+    }
+  else
+    {
+      CurCoord.x = CurCoord.x + DX;
+      CurCoord.y = CurCoord.y + DY;
+    }
+
+  if (CurCoord.x < 0)
+    CurCoord.x += PLATOSize.x;
+  else if (CurCoord.x >= PLATOSize.x)
+    CurCoord.x -= PLATOSize.x;
+
+  if (CurCoord.y < 0)
+    CurCoord.y += PLATOSize.y;
+  else if (CurCoord.y >= PLATOSize.y)
+    CurCoord.y -= PLATOSize.y;
+}
+
+
+/*----------------------------------------------*
+ *	Superx, Subx, etc.			*
+ *						*
+ *	Various character positioning commands.	*
+ *----------------------------------------------*/
+
+void
+Superx (void)
+{
+  FixXY (0, 5);
+}
+
+void
+Subx (void)
+{
+  FixXY (0, -5);
+}
+
+void
+Marginx (void)
+{
+  if (Rotate)
+    Margin = CurCoord.y;
+  else
+    Margin = CurCoord.x;
+}
+
+void
+BSx (void)
+{
+  FixXY (-8, 0);
+}
+
+void
+HTx (void)
+{
+  FixXY (8, 0);
+}
+
+void
+LFx (void)
+{
+  FixXY (0, -16);
+}
+
+void
+VTx (void)
+{
+  FixXY (0, 16);
+}
+
+void
+FFx (void)
+{
+  CurCoord.y = 0;
+  CurCoord.x = 0;
+  LFx ();
+}
+
+void
+CRx (void)
+{
+  if (Rotate)
+    CurCoord.y = Margin;
+  else
+    CurCoord.x = Margin;
+  LFx ();
+}
+
+
+/*----------------------------------------------*
+ *	LoadCoordx				*
+ *						*
+ *	Assemble completed coordinate.		*
+ *----------------------------------------------*/
+
+void
+LoadCoordx (padPt * SetCoord)
+{
+  SetCoord->x = (HiX << 5) + LowX;
+  SetCoord->y = (HiY << 5) + LowY;
+}
+
+
+/*----------------------------------------------*
+ *	Blockx, Pointx, Linex, Alphax		*
+ *						*
+ *	Plot the specified item at the		*
+ *	current location.			*
+ *----------------------------------------------*/
+
+void
+Blockx (void)
+{
+  padPt NewCoord;
+
+  if (SubMode == 0)
+    {
+      LoadCoordx (&CurCoord);
+      SubMode = 1;
+    }
+  else
+    {
+      LoadCoordx (&NewCoord);
+      screen_block_draw (&CurCoord, &NewCoord);
+      SubMode = 0;
+      CurCoord.y-=15; 
+      CurCoord.x+=16;
+    }
+}
+
+void
+Pointx (void)
+{
+  LoadCoordx (&CurCoord);
+  screen_dot_draw (&CurCoord);
+}
+
+void
+Linex (void)
+{
+  padPt OldCoord;
+
+  if (SubMode == 0)
+    {
+      LoadCoordx (&CurCoord);
+      SubMode = 1;
+    }
+  else
+    {
+      OldCoord.y = CurCoord.y;
+      OldCoord.x = CurCoord.x;
+      LoadCoordx (&CurCoord);
+      screen_line_draw (&OldCoord, &CurCoord);
+    }
+}
+
+void
+Alphax (void)
+{
+  if (charCount == 0)
+    charCoord = CurCoord;
+  charBuff[charCount++] = theChar;
+  HTx ();
+  if (charCount >= BSIZE)
+    {
+      screen_char_draw (&charCoord, charBuff, charCount);
+      charCount = 0;
+    }
+}
+
+
+/*----------------------------------------------*
+ *	LoadEchox				*
+ *						*
+ *	Echo responses to system.		*
+ *----------------------------------------------*/
+
+void
+LoadEchox (void)
+{
+  theWord &= 0x7f;
+  switch (theWord)
+    {
+
+    case 0x52:
+      FlowControl=true;
+      if (FlowControl)
+	Echo (0x53);		/* flow control on */
+      else
+	Echo (0x52);		/* flow control not on */
+      break;
+    case 0x60:                  /* Inquire about ascii specific features. */
+      Echo (terminal_get_features());
+      break;
+    case 0x70:
+      Echo (terminal_get_type ());	/* terminal type */
+      break;
+
+    case 0x71:
+      Echo (terminal_get_subtype());	/* subtype */
+      break;
+
+    case 0x72:
+      Echo (terminal_get_load_file ());	/* load file */
+      break;
+
+    case 0x73:
+      Echo (terminal_get_configuration ());	/* configuration */
+      break;
+
+    case 0x7A:
+      Key (0x3FF);		/* send backout */
+      break;
+
+    case 0x7B:
+      screen_beep ();
+      break;			/* beep */
+
+    case 0x7D:
+      Echo (terminal_mem_read (MemAddr) & 0x7F);
+      break;
+
+    default:
+      Echo (theWord);		/* normal echo */
+      break;
+    }
+}
+
+void
+LoadAddrx (void)
+{
+  MemAddr = theWord;
+  CharCnt = 0;
+}
+
+void
+LoadCharx (void)
+{
+  Char[CharCnt] = theWord;
+  if (CharCnt < 7)
+    CharCnt++;
+  else
+    {
+      terminal_char_load ((((MemAddr - terminal_get_char_address ()) >> 4) & 0x7f), Char);
+      CharCnt = 0;
+      MemAddr += 16;
+    }
+}
+
+void
+LoadMemx (void)
+{
+  terminal_mem_load (MemAddr, theWord);
+  MemAddr += 2;
+}
+
+void
+SSFx (void)
+{
+  padByte device;
+
+  device = (theWord >> 10) & 0xFF;
+  if (device == 1)
+    {
+      terminal_ext_allow ((theWord >> 3) & 1);
+      touch_allow ((theWord >> 5) & 1);
+    }
+  else if ((theWord >> 9) & 1)
+    {
+      terminal_set_ext_in (device);
+      if (!((theWord >> 8) & 1))
+	Ext (terminal_ext_in ());
+    }
+  else
+    {
+      terminal_set_ext_out (device);
+      if (!((theWord >> 8) & 1))
+	terminal_ext_out (theWord & 0xFF);
+    }
+}
+
+void
+Externalx (void)
+{
+  terminal_ext_out ((theWord >> 8) & 0xFF);
+  terminal_ext_out (theWord & 0xFF);
+}
+
+void
+GoMode (void)
+{
+  switch (CMode)
+    {
+    case mBlock:
+      Blockx ();
+      break;
+    case mPoint:
+      Pointx ();
+      break;
+    case mLine:
+      Linex ();
+      break;
+    case mAlpha:
+      Alphax ();
+      break;
+    case mLoadCoord:
+      LoadCoordx (&CurCoord);
+      break;
+    case mLoadAddr:
+      LoadAddrx ();
+      break;
+    case mSSF:
+      SSFx ();
+      break;
+    case mExternal:
+      Externalx ();
+      break;
+    case mLoadEcho:
+      LoadEchox ();
+      break;
+    case mLoadChar:
+      LoadCharx ();
+      break;
+    case mLoadMem:
+      LoadMemx ();
+      break;
+    case mMode5:
+      terminal_mode_5 (theWord);
+      break;
+    case mMode6:
+      terminal_mode_6 (theWord);
+      break;
+    case mMode7:
+      terminal_mode_7 (theWord);
+      break;
+    case mFore:
+      screen_foreground(&theColor);
+      break;
+    case mBack:
+      screen_background(&theColor);
+      break;
+    case mPaint:
+      screen_paint(&CurCoord);
+      break;
+    }
+  CMode = PMode;
+  CType = PType;
+  Phase = 0;
+}
+
+void
+GoWord (void)
+{
+  switch (Phase)
+    {
+    case 0:
+      theWord = theChar & 0x3F;
+      Phase = 1;
+      break;
+    case 1:
+      theWord |= ((theChar & 0x3F) << 6);
+      Phase = 2;
+      break;
+    case 2:
+      theWord |= ((theChar & 0x3F) << 12);
+      GoMode ();
+      break;
+    }
+}
+
+void
+GoCoord (void)
+{
+  unsigned short CoordType, CoordValue;
+
+  CoordValue = theChar & 0x1F;
+  CoordType = ((theChar >> 5) & 3);
+  switch (CoordType)
+    {
+    case 1:
+      switch (Phase)
+	{
+	case 0:
+	  HiY = CoordValue;
+	  break;
+	case 1:
+	  HiX = CoordValue;
+	  break;
+	}
+      Phase = 1;
+      break;
+    case 2:
+      LowX = CoordValue;
+      GoMode ();
+      break;
+    case 3:
+      LowY = CoordValue;
+      Phase = 1;
+      break;
+    }
+}
+
+void
+GoColor (void)
+{
+  switch (Phase)
+    {
+    case 0:
+      theColor.blue = (theChar & 0x3f);
+      break;
+    case 1:
+      theColor.blue |= (theChar & 0x03) << 6;
+      theColor.green = (theChar & 0x3c) >> 2;
+      break;
+    case 2:
+      theColor.green |= (theChar & 0x0f) << 4;
+      theColor.red = (theChar & 0x30) >> 4;
+      break;
+    case 3:
+      theColor.red |= (theChar & 0x3f) << 2;
+      break;
+    }
+  if (Phase < 3)
+    Phase++;
+  else
+    GoMode ();
+}
+
+void
+GoPaint (void)
+{
+  if (Phase == 0)
+    Phase = 1;
+  else
+    GoMode ();
+
+}
+
+void
+DataChar (void)
+{
+  switch (CType)
+    {
+    case tByte:
+      Alphax ();
+      break;
+    case tWord:
+      GoWord ();
+      break;
+    case tCoord:
+      GoCoord ();
+      break;
+    case tColor:
+      GoColor ();
+      break;
+    case tPaint:
+      GoPaint ();
+      break;
+    }
+}
+
+void
+ShowPLATO (padByte *buff, unsigned short count)
+{
+  while (count--)
+    {
+      theChar = *buff++;
+      if (lastChar==0xFF && theChar==0xFF)
+	{
+	  lastChar=0;
+	}
+      else
+	{
+	  rawChar=theChar;
+	  theChar &=0x7F;
+	  if (TTY)
+	    {
+	      if (!EscFlag)
+		screen_tty_char (theChar);
+	      else if (theChar == 0x02)
+		InitPLATOx ();
+	    }
+	  else if (EscFlag)
+	    {
+	      switch (theChar)
+		{
+		case 0x03:
+		  InitTTY ();
+		  break;
+		  
+		case 0x0C:
+		  screen_clear ();
+		  break;
+		  
+		case 0x11:
+		  CurMode = ModeInverse;
+		  SetFast();
+		  break;
+		case 0x12:
+		  CurMode = ModeWrite;
+		  SetFast();
+		  break;
+		case 0x13:
+		  CurMode = ModeErase;
+		  SetFast();
+		  break;
+		case 0x14:
+		  CurMode = ModeRewrite;
+		  SetFast();
+		  break;
+		  
+		case 0x32:
+		  SetCommand (mLoadCoord, tCoord);
+		  break;
+		  
+		case 0x40:
+		  Superx ();
+		  break;
+		case 0x41:
+		  Subx ();
+		  break;
+		  
+		case 0x42:
+		  CurMem = M0;
+		  break;
+		case 0x43:
+		  CurMem = M1;
+		  break;
+		case 0x44:
+		  CurMem = M2;
+		  break;
+		case 0x45:
+		  CurMem = M3;
+		  break;
+		  
+		case 0x4A:
+		  Rotate = false;
+		  SetFast();
+		  break;
+		case 0x4B:
+		  Rotate = true;
+		  SetFast();
+		  break;
+		case 0x4C:
+		  Reverse = false;
+		  SetFast();
+		  break;
+		case 0x4D:
+		  Reverse = true;
+		  SetFast();
+		  break;
+		case 0x4E:
+		  ModeBold = false;
+		  SetFast();
+		  break;
+		case 0x4F:
+		  ModeBold = true;
+		  SetFast();
+		  break;
+		  
+		case 0x50:
+		  SetMode (mLoadChar, tWord);
+		  break;
+		case 0x51:
+		  SetCommand (mSSF, tWord);
+		  break;
+		case 0x52:
+		  SetCommand (mExternal, tWord);
+		  break;
+		case 0x53:
+		  SetMode (mLoadMem, tWord);
+		  break;
+		case 0x54:
+		  SetMode (mMode5, tWord);
+		  break;
+		case 0x55:
+		  SetMode (mMode6, tWord);
+		  break;
+		case 0x56:
+		  SetMode (mMode7, tWord);
+		  break;
+		case 0x57:
+		  SetCommand (mLoadAddr, tWord);
+		  break;
+		case 0x59:
+		  SetCommand (mLoadEcho, tWord);
+		  break;
+		  
+		case 0x5A:
+		  Marginx ();
+		  break;
+		  
+		case 0x61:
+		  SetCommand (mFore, tColor);
+		  break;
+		case 0x62:
+		  SetCommand (mBack, tColor);
+		  break;
+		case 0x63:
+		  SetCommand (mPaint, tPaint);
+		  break;
+		}
+	    }
+	  else if (theChar < 0x20)
+	    {
+	      if (charCount > 0)
+		{
+		  screen_char_draw (&charCoord, charBuff, charCount);
+		  charCount = 0;
+		}
+	      switch (theChar)
+		{
+		case 0x00:
+		  screen_wait();
+		case 0x08:
+		  BSx ();
+		  break;
+		case 0x09:
+		  HTx ();
+		  break;
+		case 0x0A:
+		  LFx ();
+		  break;
+		case 0x0B:
+		  VTx ();
+		  break;
+		case 0x0C:
+		  FFx ();
+		  break;
+		case 0x0D:
+		  CRx ();
+		  break;
+		  
+		case 0x19:
+		  SetMode (mBlock, tCoord);
+		  break;
+		case 0x1C:
+		  SetMode (mPoint, tCoord);
+		  break;
+		case 0x1D:
+		  SetMode (mLine, tCoord);
+		  break;
+		case 0x1F:
+		  SetMode (mAlpha, tByte);
+		  break;
+		}
+	    }
+	  else
+	    DataChar ();
+	  
+	  EscFlag = (theChar == 0x1B);
+	  lastChar=rawChar;
+	}
+    }
+  if (charCount > 0)
+    {
+      screen_char_draw (&charCoord, charBuff, charCount);
+      charCount = 0;
+    }
+}
+
+/**
+ * SetFast()
+ * Toggle fast text output if mode = write or erase, and no rotate or bold
+ */
+void SetFast(void)
+{
+  FastText = (((CurMode == ModeWrite) || (CurMode == ModeErase)) && ((Rotate == padF) && (ModeBold == padF))); 
+}
diff --git a/protocol.h b/protocol.h
new file mode 100755
index 0000000..131a9ab
--- /dev/null
+++ b/protocol.h
@@ -0,0 +1,95 @@
+/**
+ * PLATOTerm64 - A PLATO Terminal for the Commodore 64
+ * Based on Steve Peltz's PAD
+ * 
+ * Author: Thomas Cherryhomes <thom.cherryhomes at gmail dot com>
+ * This file written by Steve Peltz. Copyright notice preserved.
+ * and this code has been used with permission, and can be considered
+ * public domain.
+ *
+ * protocol.h - Protocol decoder functions 
+ */
+
+/* Copyright (c) 1990 by Steve Peltz */
+
+#ifndef PROTOCOL_H
+#define PROTOCOL_H
+
+#define ACCESS	0x3c
+
+typedef	unsigned char	padByte;
+typedef	enum {padF, padT} padBool;
+typedef	unsigned char	padChar;
+typedef	short	padWord;
+typedef	padWord	charData[8];
+typedef	struct {
+	padByte	red,
+		green,
+		blue;
+	} padRGB;
+
+typedef struct {
+	padWord	x,
+		y;
+	} padPt;
+
+typedef enum {ModeWrite, ModeErase, ModeRewrite, ModeInverse} DispMode;
+typedef enum {M0, M1, M2, M3} CharMem;
+
+typedef enum {	mBlock, mPoint, mLine, mAlpha, mLoadCoord, mLoadChar, mSSF,
+		mExternal, mLoadMem, mMode5, mMode6, mMode7, mLoadAddr,
+		mLoadEcho, mFore, mBack, mPaint } Mode;
+ 
+typedef enum {	tByte, tWord, tCoord, tColor, tPaint } DataType;
+
+extern	padPt		PLATOSize;
+extern	CharMem		CurMem;
+extern	padBool		TTY,
+			FlowControl,
+			ModeBold,
+			Rotate,
+			Reverse;
+extern	DispMode	CurMode;
+extern  padBool         NoEcho;
+
+void InitPAD(void);
+void InitTTY(void);
+void InitPLATO(void);
+void InitPLATOx(void);
+void Key(padWord theKey);
+void Touch(padPt* where);
+void Ext(padWord theKey);
+void Echo(padWord theKey);
+void SetCommand(Mode theMode, DataType theType);
+void SetMode(Mode theMode, DataType theType);
+void FixXY(short DX, short DY);
+void Superx(void);
+void Subx(void);
+void Marginx(void);
+void BSx(void);
+void HTx(void);
+void LFx(void);
+void VTx(void);
+void FFx(void);
+void CRx(void);
+void LoadCoordx(padPt* SetCoord);
+void Blockx(void);
+void Pointx(void);
+void Linex(void);
+void Alphax(void);
+void LoadEchox(void);
+void LoadAddrx(void);
+void LoadCharx(void);
+void LoadMemx(void);
+void SSFx(void);
+void Externalx(void);
+void GoMode(void);
+void GoWord(void);
+void GoCoord(void);
+void GoColor(void);
+void GoPaint(void);
+void DataChar(void);
+void ShowPLATO(padByte* buff, unsigned short count);
+void SetFast(void);
+
+#endif
diff --git a/screen.c b/screen.c
new file mode 100644
index 0000000..a7bfd38
--- /dev/null
+++ b/screen.c
@@ -0,0 +1,599 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "screen.h"
+#include "font.h"
+#include "protocol.h"
+#include "io.h"
+
+#define true 1
+#define false 0
+#define FONTPTR(a) (a<<4)
+#define X(x) (x)
+#define Y(y) (y^0x1FF)
+
+char tmp[64];
+int previousMode;
+unsigned char CharWide=8;
+unsigned char CharHigh=16;
+padPt TTYLoc;
+padPt statusLoc={0,0};
+unsigned char fontm23[2048];
+extern padBool FastText; /* protocol.c */
+padRGB palette[16];
+unsigned long current_foreground=1;
+unsigned long current_background=0;
+padRGB current_foreground_rgb={255,255,255};
+padRGB current_background_rgb={0,0,0};
+int highest_color_index;
+padRGB palette_help[16];
+padRGB palette_backup[16];
+unsigned long current_foreground_backup=1;
+unsigned long current_background_backup=0;
+padRGB current_foreground_rgb_backup={255,255,255};
+padRGB current_background_rgb_backup={0,0,0};
+int highest_color_index_backup;
+unsigned char help_active=false;
+
+/**
+ * screen_init() - Set up the screen
+ */
+void screen_init(void)
+{
+}
+
+/**
+ * screen_update_colors() - Set the terminal colors
+ */
+void screen_update_colors(void)
+{
+}
+
+/**
+ * screen_clear_palette - Clear the palette
+ */
+void screen_clear_palette(void)
+{
+  int i;
+  for (i=0;i<8;i++)
+    {
+      palette[i].red=0;
+      palette[i].green=0;
+      palette[i].blue=0;
+    }
+}
+
+
+/**
+ * screen_wait(void) - Sleep for approx 16.67ms
+ */
+void screen_wait(void)
+{
+}
+
+/**
+ * screen_beep(void) - Beep the terminal
+ */
+void screen_beep(void)
+{
+}
+
+/**
+ * screen_clear - Clear the screen
+ */
+void screen_clear(void)
+{
+}
+
+/**
+ * screen_color_matching(color) - return index of matching color, or a new index, 
+ * if not found.
+ */
+unsigned char screen_color_matching(padRGB* theColor)
+{
+  unsigned char i;
+  for (i=0;i<8;i++)
+    {
+      if (i>highest_color_index)
+	{
+	  palette[i].red=theColor->red;
+	  palette[i].green=theColor->green;
+	  palette[i].blue=theColor->blue;
+	  highest_color_index++;
+	  return i;
+	}
+      else
+	{
+	  if ((palette[i].red==theColor->red) && 
+	      (palette[i].green==theColor->green) && 
+	      (palette[i].blue==theColor->blue))
+	    {
+	      return i;
+	    }
+	}
+    }
+}
+
+/**
+ * screen_foreground - set foreground color
+ */
+void screen_foreground(padRGB* theColor)
+{
+  current_foreground_rgb.red=theColor->red;
+  current_foreground_rgb.green=theColor->green;
+  current_foreground_rgb.blue=theColor->blue;
+  current_foreground=screen_color_matching(theColor);
+  screen_update_colors();
+}
+
+/**
+ * screen_background - set background_color
+ */
+void screen_background(padRGB* theColor)
+{
+  current_background_rgb.red=theColor->red;
+  current_background_rgb.green=theColor->green;
+  current_background_rgb.blue=theColor->blue;
+  current_background=screen_color_matching(theColor);
+  screen_update_colors();
+}
+
+/**
+ * screen_current_color(void) - Set the current pen mode
+ */
+int screen_current_color(void)
+{
+  if (CurMode==ModeInverse || CurMode==ModeErase)
+    return current_background;
+  else
+    return current_foreground;
+}
+
+/**
+ * screen_block_draw(Coord1, Coord2) - Perform a block fill from Coord1 to Coord2
+ */
+void screen_block_draw(padPt* Coord1, padPt* Coord2)
+{
+}
+
+/**
+ * screen_dot_draw(Coord) - Plot a mode 0 pixel
+ */
+void screen_dot_draw(padPt* Coord)
+{
+}
+
+/**
+ * screen_line_draw(Coord1, Coord2) - Draw a mode 1 line
+ */
+void screen_line_draw(padPt* Coord1, padPt* Coord2)
+{
+}
+
+/**
+ * screen_char_draw(Coord, ch, count) - Output buffer from ch* of length count as PLATO characters
+ */
+void screen_char_draw(padPt* Coord, unsigned char* ch, unsigned char count)
+{
+  short offset; /* due to negative offsets */
+  unsigned short x;      /* Current X and Y coordinates */
+  unsigned short y;
+  unsigned short* px;   /* Pointers to X and Y coordinates used for actual plotting */
+  unsigned short* py;
+  unsigned char i; /* current character counter */
+  unsigned char a; /* current character byte */
+  unsigned char j,k; /* loop counters */
+  char b; /* current character row bit signed */
+  unsigned char width=8;
+  unsigned char height=16;
+  unsigned char FONT_SIZE_X=8;
+  unsigned char FONT_SIZE_Y=16;
+  unsigned short deltaX=1;
+  unsigned short deltaY=1;
+  unsigned char mainColor=1;
+  unsigned char altColor=0;
+  unsigned char *p;
+  unsigned char* curfont;
+  
+  switch(CurMem)
+    {
+    case M0:
+      curfont=font;
+      offset=-32;
+      break;
+    case M1:
+      curfont=font;
+      offset=64;
+      break;
+    case M2:
+      curfont=fontm23;
+      offset=-32;
+      break;
+    case M3:
+      curfont=fontm23;
+      offset=32;      
+      break;
+    }
+
+  if (CurMode==ModeRewrite)
+    {
+      altColor=current_background;
+    }
+  else if (CurMode==ModeInverse)
+    {
+      altColor=current_foreground;
+    }
+  
+  if (CurMode==ModeErase || CurMode==ModeInverse)
+    mainColor=current_background;
+  else
+    mainColor=current_foreground;
+
+  x=X(Coord->x&0x1FF);
+
+  if (ModeBold)
+    y=Y((Coord->y)+30&0x1FF);
+  else
+    y=Y((Coord->y)+15&0x1FF);
+  
+  if (FastText==padF)
+    {
+      goto chardraw_with_fries;
+    }
+
+  /* the diet chardraw routine - fast text output. */
+  
+  for (i=0;i<count;++i)
+    {
+      a=*ch;
+      ++ch;
+      a+=offset;
+      p=&curfont[FONTPTR(a)];
+      
+      for (j=0;j<FONT_SIZE_Y;++j)
+  	{
+  	  b=*p;
+	  
+  	  for (k=0;k<FONT_SIZE_X;++k)
+  	    {
+  	      if (b<0) /* check sign bit. */
+		{
+		  /* pset(x,y,mainColor); */
+		}
+
+	      ++x;
+  	      b<<=1;
+  	    }
+
+	  ++y;
+	  x-=width;
+	  ++p;
+  	}
+
+      x+=width;
+      y-=height;
+    }
+
+  return;
+
+ chardraw_with_fries:
+  if (Rotate)
+    {
+      deltaX=-abs(deltaX);
+      width=-abs(width);
+      px=&y;
+      py=&x;
+    }
+    else
+    {
+      px=&x;
+      py=&y;
+    }
+  
+  if (ModeBold)
+    {
+      deltaX = deltaY = 2;
+      width<<=1;
+      height<<=1;
+    }
+  
+  for (i=0;i<count;++i)
+    {
+      a=*ch;
+      ++ch;
+      a+=offset;
+      p=&curfont[FONTPTR(a)];
+      for (j=0;j<FONT_SIZE_Y;++j)
+  	{
+  	  b=*p;
+
+	  if (Rotate)
+	    {
+	      px=&y;
+	      py=&x;
+	    }
+	  else
+	    {
+	      px=&x;
+	      py=&y;
+	    }
+
+  	  for (k=0;k<FONT_SIZE_X;++k)
+  	    {
+  	      if (b<0) /* check sign bit. */
+		{
+		  if (ModeBold)
+		    {
+		      /* pset(*px+1,*py,mainColor); */
+		      /* pset(*px,*py+1,mainColor); */
+		      /* pset(*px+1,*py+1,mainColor); */
+		    }
+		  /* pset(*px,*py,mainColor); */
+		}
+	      else
+		{
+		  if (CurMode==ModeInverse || CurMode==ModeRewrite)
+		    {
+		      if (ModeBold)
+			{
+			  /* pset(*px+1,*py,altColor); */
+			  /* pset(*px,*py+1,altColor); */
+			  /* pset(*px+1,*py+1,altColor); */
+			}
+		      /* pset(*px,*py,altColor);  */
+		    }
+		}
+
+	      x += deltaX;
+  	      b<<=1;
+  	    }
+
+	  y+=deltaY;
+	  x-=width;
+	  ++p;
+  	}
+
+      Coord->x+=width;
+      x+=width;
+      y-=height;
+    }
+
+  return;
+  
+}
+
+/**
+ * screen_tty_char - Called to plot chars when in tty mode
+ */
+void screen_tty_char(padByte theChar)
+{
+  if ((theChar >= 0x20) && (theChar < 0x7F)) {
+    screen_char_draw(&TTYLoc, &theChar, 1);
+    TTYLoc.x += CharWide;
+  }
+  else if ((theChar == 0x0b)) /* Vertical Tab */
+    {
+      TTYLoc.y += CharHigh;
+    }
+  else if ((theChar == 0x08) && (TTYLoc.x > 7))	/* backspace */
+    {
+      padPt ec1,ec2;
+      TTYLoc.x -= CharWide;
+      ec1.x=TTYLoc.x;
+      ec1.y=TTYLoc.y;
+      ec2.x=TTYLoc.x+CharWide;
+      ec2.y=TTYLoc.y+CharHigh;
+      CurMode=ModeErase;
+      screen_block_draw(&ec1,&ec2);
+      CurMode=ModeRewrite;
+   }
+  else if (theChar == 0x0A)			/* line feed */
+    TTYLoc.y -= CharHigh;
+  else if (theChar == 0x0D)			/* carriage return */
+    TTYLoc.x = 0;
+  
+  if (TTYLoc.x + CharWide > 511) {	/* wrap at right side */
+    TTYLoc.x = 0;
+    TTYLoc.y -= CharHigh;
+  }
+  
+  if (TTYLoc.y < 0) {
+    screen_clear();
+    TTYLoc.y=495;
+  }
+
+}
+
+/**
+ * screen_paint - Called to paint at location.
+ */
+void screen_paint(padPt* Coord)
+{
+}
+
+/**
+ * screen_clear_status(void)
+ * Clear status area
+ */
+void screen_clear_status(void)
+{
+}
+
+/**
+ * screen_show_status(msg)
+ */
+void screen_show_status(unsigned char* msg)
+{
+  int previous_foreground=current_foreground;
+  int previous_background=current_background;
+  padPt coord={0,0};
+  screen_clear_status();
+  current_foreground=0;
+  current_background=1;
+  screen_char_draw(&coord,msg,strlen(msg));
+  current_foreground=previous_foreground;
+  current_background=previous_background;
+}
+
+/**
+ * screen_show_baud_rate - Show baud rate
+ */
+void screen_show_baud_rate(int baud)
+{
+  sprintf(tmp,"%d Baud",baud);
+  screen_show_status(tmp);
+}
+
+/**
+ * screen_show_dial - Show dial in TTY mode
+ */
+void screen_show_dial(void)
+{
+}
+
+/**
+ * screen_show_hang_up - Show hang-up message
+ */
+void screen_show_hang_up(void)
+{
+  screen_show_status("Hanging up...");
+}
+
+/**
+ * screen_show_dialing_status - Show dialing status.
+ */
+void screen_show_dialing_status(void)
+{
+  screen_show_status("Dialing...");
+}
+
+/**
+ * screen_help_save_palette(void) - Save initial help palette
+ * for future restore by screen_help_restore_palette(void)
+ */
+void screen_help_save_palette(void)
+{
+  int i;
+  for (i=0;i<16;i++)
+    {
+      palette_help[i].red=palette[i].red;
+      palette_help[i].green=palette[i].green;
+      palette_help[i].blue=palette[i].blue;
+    }
+}
+
+/**
+ * screen_help_restore_palette(void) - Restore the help
+ * palette, because the help screen is visible.
+ */
+void screen_help_restore_palette(void)
+{
+  int i;
+  for (i=0;i<16;i++)
+    {
+      palette[i].red=palette_help[i].red;
+      palette[i].green=palette_help[i].green;
+      palette[i].blue=palette_help[i].blue;
+    }
+  screen_update_colors();
+}
+
+/**
+ * screen_save_palette(void) - Save current screen palette state
+ * for restore by screen_restore_palette(void)
+ */
+void screen_save_palette(void)
+{
+  int i;
+
+  current_foreground_backup=current_foreground;
+  current_background_backup=current_background;
+  current_foreground_rgb_backup.red=current_foreground_rgb.red;
+  current_foreground_rgb_backup.green=current_foreground_rgb.green;
+  current_foreground_rgb_backup.blue=current_foreground_rgb.blue;
+  current_background_rgb_backup.red=current_background_rgb.red;
+  current_background_rgb_backup.green=current_background_rgb.green;
+  current_background_rgb_backup.blue=current_background_rgb.blue;
+  highest_color_index_backup=highest_color_index;
+  
+  for (i=0;i<16;i++)
+    {
+      palette_backup[i].red=palette[i].red;
+      palette_backup[i].green=palette[i].green;
+      palette_backup[i].blue=palette[i].blue;
+    }
+  
+}
+
+/**
+ * screen_restore_palette(void) - Restore current screen palette
+ * upon return from help screen.
+ */
+void screen_restore_palette(void)
+{
+  int i;
+
+  current_foreground=current_foreground_backup;
+  current_background=current_background_backup;
+  current_foreground_rgb.red=current_foreground_rgb_backup.red;
+  current_foreground_rgb.green=current_foreground_rgb_backup.green;
+  current_foreground_rgb.blue=current_foreground_rgb_backup.blue;
+  current_background_rgb.red=current_background_rgb_backup.red;
+  current_background_rgb.green=current_background_rgb_backup.green;
+  current_background_rgb.blue=current_background_rgb_backup.blue;
+  highest_color_index=highest_color_index_backup;
+  
+  for (i=0;i<16;i++)
+    {
+      palette[i].red=palette_backup[i].red;
+      palette[i].green=palette_backup[i].green;
+      palette[i].blue=palette_backup[i].blue;
+    }
+
+  screen_update_colors();
+  
+}
+
+/**
+ * screen_show_help - SHow help
+ */
+void screen_show_help(void)
+{
+}
+
+/**
+ * screen_trace_status - Show trace status
+ */
+void screen_trace_status(const char* status)
+{
+  char tmp_status_msg[13];
+  sprintf(tmp_status_msg,"TRACE: %s",status);
+  screen_show_status(tmp_status_msg);
+}
+
+/**
+ * screen_help_mode_status(void)
+ * Put help mode status at bottom of help screen
+ */
+void screen_help_mode_status(void)
+{
+  screen_show_status("HELP Mode - Press any key to return to terminal.");
+}
+
+/**
+ * screen_greeting(void)
+ * show initial greeting
+ */
+void screen_greeting(void)
+{
+  /* sprintf(tmp,"v1.0 Ready - %5d baud - Press HELP for keys.",config.baud); */
+  screen_show_status(tmp);
+}
+
+/**
+ * screen_done()
+ * Close down TGI
+ */
+void screen_done(void)
+{
+}
diff --git a/screen.h b/screen.h
new file mode 100755
index 0000000..f4a833b
--- /dev/null
+++ b/screen.h
@@ -0,0 +1,168 @@
+/**
+ * PLATOTerm64 - A PLATO Terminal for the Commodore 64
+ * Based on Steve Peltz's PAD
+ * 
+ * Author: Thomas Cherryhomes <thom.cherryhomes at gmail dot com>
+ *
+ * screen.h - Display output functions
+ */
+
+#ifndef SCREEN_H
+#define SCREEN_H
+
+#include "protocol.h"
+
+/**
+ * screen_init() - Set up the screen
+ */
+void screen_init(void);
+
+/**
+ * screen_update_colors() - Set the terminal colors
+ */
+void screen_update_colors(void);
+
+/**
+ * screen_wait(void) - Sleep for approx 16.67ms
+ */
+void screen_wait(void);
+
+/**
+ * screen_beep(void) - Beep the terminal
+ */
+void screen_beep(void);
+
+/**
+ * screen_clear_palette - Clear the palette
+ */
+void screen_clear_palette(void);
+
+/**
+ * screen_clear - Clear the screen
+ */
+void screen_clear(void);
+
+/**
+ * screen_current_color(void) - Set the current pen mode
+ */
+int screen_current_color(void);
+
+/**
+ * screen_block_draw(Coord1, Coord2) - Perform a block fill from Coord1 to Coord2
+ */
+void screen_block_draw(padPt* Coord1, padPt* Coord2);
+
+/**
+ * screen_dot_draw(Coord) - Plot a mode 0 pixel
+ */
+void screen_dot_draw(padPt* Coord);
+
+/**
+ * screen_line_draw(Coord1, Coord2) - Draw a mode 1 line
+ */
+void screen_line_draw(padPt* Coord1, padPt* Coord2);
+
+/**
+ * screen_char_draw(Coord, ch, count) - Output buffer from ch* of length count as PLATO characters
+ */
+void screen_char_draw(padPt* Coord, unsigned char* ch, unsigned char count);
+
+/**
+ * screen_tty_char - Called to plot chars when in tty mode
+ */
+void screen_tty_char(unsigned char theChar);
+
+/**
+ * screen_color_matching(color) - return index of matching color, or a new index, 
+ * if not found.
+ */
+unsigned char screen_color_matching(padRGB* theColor);
+
+/**
+ * screen_foreground - Called to set foreground color.
+ */
+void screen_foreground(padRGB* theColor);
+
+/**
+ * screen_background - Called to set foreground color.
+ */
+void screen_background(padRGB* theColor);
+
+/**
+ * screen_paint - Called to paint at location.
+ */
+void screen_paint(padPt* Coord);
+
+/**
+ * screen_show_baud_rate - Show baud rate
+ */
+void screen_show_baud_rate(int baud);
+
+/**
+ * screen_show_hang_up - Show hang-up message
+ */
+void screen_show_hang_up(void);
+
+/**
+ * screen_show_dial - Show dial in TTY mode
+ */
+void screen_show_dial(void);
+
+/**
+ * screen_show_dialing_status - Show dialing status.
+ */
+void screen_show_dialing_status(void);
+
+/**
+ * screen_help_save_palette(void) - Save initial help palette
+ * for future restore by screen_help_restore_palette(void)
+ */
+void screen_help_save_palette(void);
+
+/**
+ * screen_help_restore_palette(void) - Restore the help
+ * palette, because the help screen is visible.
+ */
+void screen_help_restore_palette(void);
+
+/**
+ * screen_save_palette(void) - Save current screen palette state
+ * for restore by screen_restore_palette(void)
+ */
+void screen_save_palette(void);
+
+/**
+ * screen_restore_palette(void) - Restore current screen palette
+ * upon return from help screen.
+ */
+void screen_restore_palette(void);
+
+/**
+ * screen_show_help - SHow help
+ */
+void screen_show_help(void);
+
+/**
+ * screen_trace_status - Show trace status
+ */
+void screen_trace_status(const char* status);
+
+/**
+ * screen_help_mode_status(void)
+ * Put help mode status at bottom of help screen
+ */
+void screen_help_mode_status(void);
+
+/**
+ * screen_greeting(void)
+ * show initial greeting
+ */
+void screen_greeting(void);
+
+/**
+ * screen_done()
+ * Close down TGI
+ */
+void screen_done(void);
+
+#endif /* SCREEN_H */
diff --git a/splash.h b/splash.h
new file mode 100755
index 0000000..39900cc
--- /dev/null
+++ b/splash.h
@@ -0,0 +1,1940 @@
+#include "protocol.h"
+
+padByte splash[] = 
+{
+ 0x1b,
+ 0x02,
+0x1b,
+0x0c,
+0x1b,
+0x12,
+0x1b,
+0xd1,
+0xc0,
+0x50,
+0xc0,
+0x1b,
+0xe1,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0xff,
+0x1b,
+0xe2,
+0xc0,
+0xc0,
+0xc0,
+0xc0,
+0x1b,
+0x0c,
+0x1b,
+0x12,
+0x1d,
+0xaf,
+0xf0,
+0xa0,
+0xc0,
+0x1b,
+0x5a,
+0x1b,
+0xd1,
+0xc0,
+0x44,
+0x41,
+0x1b,
+0xd1,
+0xc0,
+0x50,
+0xc0,
+0x1b,
+0x0c,
+0x1b,
+0x12,
+0x1b,
+0xd1,
+0xc0,
+0x50,
+0xc0,
+0x1b,
+0x5a,
+0x1b,
+0xe1,
+0xdb,
+0x53,
+0xcf,
+0x7d,
+0x1b,
+0xe2,
+0xcf,
+0x7d,
+0x53,
+0xcf,
+0x1b,
+0xd1,
+0xc0,
+0x50,
+0xc0,
+0x1b,
+0x0c,
+0x1b,
+0x12,
+0x1b,
+0xd1,
+0xc0,
+0x50,
+0xc0,
+0x1d,
+0x2e,
+0xf0,
+0x21,
+0xc0,
+0x1b,
+0x5a,
+0x1d,
+0x2d,
+0xee,
+0xa0,
+0xc9,
+0xaf,
+0x71,
+0xc9,
+0xf5,
+0xca,
+0x77,
+0xcc,
+0xf9,
+0x4e,
+0xfa,
+0xcf,
+0x7b,
+0xd4,
+0x7b,
+0x21,
+0x44,
+0xfa,
+0xc9,
+0x78,
+0xcc,
+0xf6,
+0x50,
+0x74,
+0xd1,
+0x71,
+0x53,
+0xee,
+0x55,
+0x6c,
+0x56,
+0x66,
+0xd7,
+0xe1,
+0xd7,
+0x2e,
+0xfc,
+0x56,
+0xf9,
+0xd4,
+0xf6,
+0xd2,
+0x74,
+0x50,
+0x72,
+0x4d,
+0xf0,
+0xc9,
+0xee,
+0xc3,
+0xed,
+0xa0,
+0x5a,
+0x59,
+0x2d,
+0xee,
+0x59,
+0xc9,
+0x1d,
+0x2e,
+0xfc,
+0x59,
+0xaf,
+0x6c,
+0x59,
+0x6c,
+0x21,
+0xc0,
+0x42,
+0xeb,
+0xc3,
+0x6a,
+0x44,
+0x69,
+0xc5,
+0xe7,
+0xc6,
+0x65,
+0x47,
+0xe1,
+0xc6,
+0x2e,
+0x7e,
+0x44,
+0xfc,
+0x41,
+0xc0,
+0xfc,
+0xa0,
+0x59,
+0x1d,
+0x2d,
+0xf6,
+0x21,
+0xdb,
+0xaf,
+0xfa,
+0xdb,
+0xfa,
+0x22,
+0x4b,
+0x2d,
+0xfc,
+0x4b,
+0xfc,
+0xa3,
+0x42,
+0xee,
+0x42,
+0xee,
+0x22,
+0x44,
+0x42,
+0xf0,
+0x21,
+0x5f,
+0x72,
+0x5c,
+0xf6,
+0xdb,
+0x1d,
+0xee,
+0xa3,
+0x41,
+0xaf,
+0xf5,
+0xd7,
+0x77,
+0xd8,
+0x78,
+0x59,
+0xfa,
+0x5a,
+0x7b,
+0xdb,
+0xfc,
+0xde,
+0x7d,
+0x24,
+0xc0,
+0x42,
+0xfc,
+0xc5,
+0xfa,
+0x48,
+0x78,
+0xc9,
+0xf6,
+0x4b,
+0x2d,
+0xee,
+0xa5,
+0x41,
+0xee,
+0x24,
+0x50,
+0x7d,
+0xcc,
+0x7d,
+0xa3,
+0xd7,
+0xee,
+0xd1,
+0x41,
+0x1d,
+0x2e,
+0x6c,
+0x5a,
+0xaf,
+0xed,
+0x24,
+0x41,
+0x2e,
+0x6c,
+0x48,
+0x6c,
+0xa3,
+0x5a,
+0x1d,
+0x2d,
+0xee,
+0xa5,
+0xc9,
+0xaf,
+0xed,
+0xc9,
+0xed,
+0x24,
+0x5a,
+0x7b,
+0x5a,
+0x7b,
+0xa6,
+0x47,
+0xed,
+0x47,
+0xed,
+0xa5,
+0x59,
+0x2d,
+0xee,
+0x59,
+0xc9,
+0x1d,
+0x2e,
+0xf0,
+0x27,
+0xc6,
+0x1d,
+0x2d,
+0xee,
+0xc9,
+0x6f,
+0xc0,
+0xf0,
+0xa6,
+0x5c,
+0x71,
+0xd8,
+0xf5,
+0x53,
+0x78,
+0xd1,
+0xfc,
+0x4d,
+0x2e,
+0x60,
+0xca,
+0x63,
+0xca,
+0x66,
+0x48,
+0x6c,
+0xc6,
+0x74,
+0x44,
+0xf5,
+0x44,
+0xf9,
+0x44,
+0x7d,
+0xc5,
+0xaf,
+0xe1,
+0xc6,
+0x65,
+0x48,
+0xe8,
+0xca,
+0x6c,
+0xcc,
+0xee,
+0x4e,
+0xf0,
+0x50,
+0xf3,
+0x53,
+0xf5,
+0x55,
+0x77,
+0xd8,
+0x78,
+0xdb,
+0xfa,
+0x5f,
+0xfc,
+0x27,
+0xc5,
+0x7d,
+0x4d,
+0x4e,
+0xfc,
+0xd4,
+0x7b,
+0x59,
+0xf9,
+0xde,
+0x77,
+0x28,
+0x41,
+0xf6,
+0xc3,
+0x74,
+0xc6,
+0x71,
+0x48,
+0xee,
+0x4b,
+0x6a,
+0x4e,
+0x65,
+0x50,
+0xe1,
+0xd2,
+0x2e,
+0xfc,
+0xd4,
+0xfa,
+0xd4,
+0xf5,
+0xd4,
+0x72,
+0xd4,
+0x6c,
+0x53,
+0x69,
+0xd2,
+0xe4,
+0x50,
+0xe1,
+0xcf,
+0x2d,
+0x7d,
+0xcc,
+0xfa,
+0xc9,
+0xf6,
+0xc6,
+0xf3,
+0xc3,
+0x71,
+0x27,
+0xde,
+0x6f,
+0xdb,
+0xee,
+0x56,
+0xc9,
+0x1d,
+0xaf,
+0x6c,
+0xc9,
+0x4d,
+0xeb,
+0xd2,
+0x6a,
+0x55,
+0xe7,
+0x5a,
+0x65,
+0xdd,
+0xe1,
+0x5f,
+0x2e,
+0x7d,
+0x28,
+0x41,
+0xfa,
+0x42,
+0xf6,
+0xc3,
+0xf3,
+0xc3,
+0xed,
+0x42,
+0x6a,
+0xc0,
+0xe7,
+0x27,
+0xde,
+0xe4,
+0xdd,
+0x63,
+0x5a,
+0xe1,
+0xd8,
+0x2d,
+0xff,
+0xff,
+0xd4,
+0x7e,
+0x50,
+0x7d,
+0x4d,
+0xca,
+0x7e,
+0xc5,
+0x2e,
+0x60,
+0x42,
+0xe2,
+0xa6,
+0x5f,
+0x63,
+0x5c,
+0x66,
+0x5a,
+0x69,
+0xd8,
+0xeb,
+0xd7,
+0x6c,
+0x56,
+0xf0,
+0x55,
+0x74,
+0x55,
+0x78,
+0x55,
+0x7d,
+0xd7,
+0xaf,
+0xe1,
+0x59,
+0xe4,
+0x5c,
+0x65,
+0xdd,
+0xe7,
+0x5f,
+0xe8,
+0x27,
+0xc0,
+0x69,
+0x41,
+0x6a,
+0xc3,
+0xeb,
+0xc5,
+0x6c,
+0xc9,
+0x1d,
+0x2d,
+0xee,
+0xa9,
+0x41,
+0xaf,
+0xed,
+0x41,
+0xed,
+0x28,
+0xd2,
+0x7b,
+0xd2,
+0x7b,
+0xa9,
+0x5f,
+0xed,
+0x5f,
+0xd1,
+0x2d,
+0xee,
+0xd1,
+0x41,
+0x1d,
+0xfc,
+0xaa,
+0xc6,
+0xaf,
+0x71,
+0xc6,
+0x74,
+0x47,
+0x77,
+0x48,
+0x78,
+0x48,
+0xf9,
+0xc9,
+0xfa,
+0xca,
+0x7b,
+0xcc,
+0xfc,
+0xcf,
+0xfc,
+0x2b,
+0xcc,
+0x6c,
+0xcc,
+0x6c,
+0xaa,
+0x55,
+0x2e,
+0x7e,
+0x55,
+0x7e,
+0x2b,
+0x4b,
+0xf0,
+0x4b,
+0xf0,
+0xaa,
+0x55,
+0x2d,
+0x7e,
+0x55,
+0x7e,
+0x2b,
+0xcc,
+0xee,
+0xcc,
+0xee,
+0xaa,
+0x50,
+0x6f,
+0x4d,
+0xf0,
+0x4b,
+0x71,
+0xca,
+0x72,
+0x48,
+0x74,
+0x47,
+0xf6,
+0xc6,
+0xfc,
+0xc6,
+0x1d,
+0xee,
+0x2b,
+0x4e,
+0xaf,
+0x71,
+0x4e,
+0xf5,
+0xcf,
+0x77,
+0x50,
+0xd1,
+0x78,
+0xd2,
+0xf9,
+0x53,
+0xfa,
+0xd4,
+0x7b,
+0x55,
+0x7b,
+0xac,
+0xc9,
+0x4b,
+0xfa,
+0x4e,
+0xf9,
+0xd1,
+0x78,
+0x53,
+0x77,
+0x55,
+0xf6,
+0x56,
+0xf5,
+0xd7,
+0xf3,
+0x59,
+0x72,
+0x5a,
+0x71,
+0xdb,
+0x6f,
+0x5c,
+0xee,
+0xdd,
+0x6c,
+0xde,
+0x69,
+0x5f,
+0xe7,
+0x5f,
+0x65,
+0x5f,
+0x63,
+0x5f,
+0x2e,
+0xff,
+0xff,
+0xde,
+0xfc,
+0xdd,
+0x7b,
+0x5c,
+0xf9,
+0xdb,
+0x77,
+0x59,
+0xf5,
+0xd7,
+0x74,
+0x55,
+0xf3,
+0xd2,
+0x72,
+0xd1,
+0x71,
+0xcf,
+0x2d,
+0xee,
+0x2d,
+0x44,
+0xee,
+0xac,
+0x50,
+0x2e,
+0x6f,
+0xc0,
+0x71,
+0x2b,
+0x5f,
+0x74,
+0x5f,
+0x77,
+0xac,
+0xc0,
+0xf9,
+0x42,
+0xfa,
+0x44,
+0x7b,
+0xc5,
+0xfc,
+0xc6,
+0x48,
+0x7e,
+0x4b,
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+0x8d,
+0x74,
+0xe8,
+0x65,
+0xa0,
+0x47,
+0x4e,
+0x55,
+0xa0,
+0x50,
+0xf5,
+0xe2,
+0x6c,
+0x69,
+0x63,
+0xa0,
+0xcc,
+0x69,
+0x63,
+0x65,
+0xee,
+0xf3,
+0x65,
+0x2e,
+0xa0,
+0xd2,
+0xf5,
+0xee,
+0xa0,
+0x74,
+0xe8,
+0x65,
+0xa0,
+0xf0,
+0x72,
+0x6f,
+0xe7,
+0x72,
+0xe1,
+0xed,
+0xa0,
+0x47,
+0x50,
+0xcc,
+0xac,
+0xa0,
+0x66,
+0x6f,
+0x72,
+0xa0,
+0xe4,
+0x65,
+0x74,
+0xe1,
+0x69,
+0x6c,
+0xf3,
+0x2e,
+0x1d,
+0x1b,
+0x12,
+0x28,
+0xf0,
+0x2e,
+0x48,
+0x1d,
+0xa9,
+0x74,
+0xa0,
+0xc0,
+0x74,
+0xaf,
+0x5f,
+0x1d,
+0x28,
+0x6c,
+0xa0,
+0xc0,
+0x6c,
+0xaf,
+0x5f,
+0x1b,
+0x59,
+0x50,
+0x41,
+0xc0,
+0x1b,
+0x03,
+};
+
diff --git a/terminal.c b/terminal.c
new file mode 100755
index 0000000..7ae9ed2
--- /dev/null
+++ b/terminal.c
@@ -0,0 +1,246 @@
+/**
+ * PLATOTerm64 - A PLATO Terminal for the Commodore 64
+ * Based on Steve Peltz's PAD
+ * 
+ * Author: Thomas Cherryhomes <thom.cherryhomes at gmail dot com>
+ *
+ * terminal.c - Terminal state functions
+ */
+
+/* Some functions are intentionally stubbed. */
+#pragma warn(unused-param, off)
+
+#include <string.h>
+#include "terminal.h"
+#include "screen.h"
+#include "protocol.h"
+
+/**
+ * ASCII Features to return in Features
+ */
+#define ASC_ZFGT        0x01
+#define ASC_ZPCKEYS     0x02
+#define ASC_ZKERMIT     0x04
+#define ASC_ZWINDOW     0x08
+
+#define true 1
+#define false 0
+
+/**
+ * protocol.c externals
+ */
+extern CharMem CurMem;
+extern padBool TTY;
+extern padBool ModeBold;
+extern padBool Rotate;
+extern padBool Reverse;
+extern DispMode CurMode;
+extern padBool FlowControl;
+
+/**
+ * screen.c externals
+ */
+extern unsigned char CharWide;
+extern unsigned char CharHigh;
+extern padPt TTYLoc;
+
+extern unsigned char already_started;
+
+#define FONTPTR(a) (a<<4)
+
+extern unsigned char fontm23[2048];
+
+static unsigned char BTAB[]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};
+static unsigned char u;
+static unsigned char curr_word;
+
+/**
+ * terminal_init()
+ * Initialize terminal state
+ */
+void terminal_init(void)
+{
+  terminal_set_tty();
+}
+
+/**
+ * terminal_initial_position()
+ * Set terminal initial position after splash screen.
+ */
+void terminal_initial_position(void)
+{
+  TTYLoc.x=0;
+  TTYLoc.y=239; }
+
+/**
+ * terminal_set_tty(void) - Switch to TTY mode
+ */
+void terminal_set_tty(void)
+{
+  if (already_started)
+    screen_clear();
+  TTY=true;
+  ModeBold=padF;
+  Rotate=padF;
+  Reverse=padF;
+  CurMem=M0;
+  CurMode=ModeRewrite;
+  /* CurMode=ModeWrite;    /\* For speed reasons. *\/ */
+  CharWide=8;
+  CharHigh=16;
+  TTYLoc.x = 0;        
+  TTYLoc.y = 495;      
+  screen_show_status("TTY Mode");
+}
+
+/**
+ * terminal_set_plato(void) - Switch to PLATO mode
+ */
+void terminal_set_plato(void)
+{
+  TTY=false;
+  screen_clear();
+  screen_show_status("PLATO Mode");
+}
+
+/**
+ * terminal_get_features(void) - Inquire about terminal ASCII features
+ */
+unsigned char terminal_get_features(void)
+{
+  return ASC_ZFGT; /* This terminal can do Fine Grained Touch (FGT) */
+}
+
+/**
+ * terminal_get_type(void) - Return the appropriate terminal type
+ */
+unsigned char terminal_get_type(void)
+{
+  return 12; /* ASCII terminal type */
+}
+
+/**
+ * terminal_get_subtype(void) - Return the appropriate terminal subtype
+ */
+unsigned char terminal_get_subtype(void)
+{
+  return 1; /* ASCII terminal subtype IST-III */
+}
+
+/**
+ * terminal_get_load_file(void) - Return the appropriate terminal loadfile (should just be 0)
+ */
+unsigned char terminal_get_load_file(void)
+{
+  return 0; /* This terminal does not load its resident from the PLATO system. */
+}
+
+/**
+ * terminal_get_configuration(void) - Return the terminal configuration
+ */
+unsigned char terminal_get_configuration(void)
+{
+  return 0x40; /* Touch panel is present. */
+}
+
+/**
+ * terminal_get_char_address(void) - Return the base address of the character set.
+ */
+unsigned short terminal_get_char_address(void)
+{
+  return 0x3000; /* What the? Shouldn't this be 0x3800? */
+}
+
+/**
+ * terminal_mem_read - Read a byte of program memory.
+ * not needed for our terminal, but must
+ * be decoded.
+ */
+padByte terminal_mem_read(padWord addr)
+{
+  return (0xFF);
+}
+
+/**
+ * terminal_mem_load - Write a byte to non-character memory.
+ * not needed for our terminal, but must be decoded.
+ */
+void terminal_mem_load(padWord addr, padWord value)
+{
+  /* Not Implemented */
+}
+
+/**
+ * Mode5, 6, and 7 are basically stubbed.
+ */
+void terminal_mode_5(padWord value)
+{ 
+}
+
+void terminal_mode_6(padWord value)
+{ 
+}
+
+void terminal_mode_7(padWord value)
+{ 
+}
+
+/**
+ * terminal_ext_allow - External Input allowed. Not implemented.
+ */
+void terminal_ext_allow(padBool allow)
+{
+  /* Not Implemented */
+}
+
+/**
+ * terminal_set_ext_in - Set which device to get input from.
+ * Not implemented
+ */
+void terminal_set_ext_in(padWord device)
+{
+}
+
+/**
+ * terminal_set_ext_out - Set which device to send external data to.
+ * Not implemented
+ */
+void terminal_set_ext_out(padWord device)
+{
+}
+
+/**
+ * terminal_ext_in - get an external input from selected device.
+ * Not implemented.
+ */
+padByte terminal_ext_in(void)
+{
+  return 0;
+}
+
+/**
+ * terminal_ext_out - Send an external output to selected device
+ * Not implemented.
+ */
+void terminal_ext_out(padByte value)
+{
+}
+
+/**
+ * terminal_char_load - Store a character into the user definable
+ * character set.
+ */
+void terminal_char_load(padWord charnum, charData theChar)
+{
+  memset(&fontm23[FONTPTR(charnum)],0,16);
+  for (curr_word=0;curr_word<8;curr_word++)
+    {
+      for (u=16; u-->0; )
+	{
+	  if (theChar[curr_word] & 1<<u)
+	    {
+	      fontm23[FONTPTR(charnum)+u^0x0f&0x0f]|=BTAB[curr_word];
+	    }
+	}
+    }
+}
diff --git a/terminal.h b/terminal.h
new file mode 100755
index 0000000..53ec4a4
--- /dev/null
+++ b/terminal.h
@@ -0,0 +1,122 @@
+/**
+ * PLATOTerm64 - A PLATO Terminal for the Commodore 64
+ * Based on Steve Peltz's PAD
+ * 
+ * Author: Thomas Cherryhomes <thom.cherryhomes at gmail dot com>
+ *
+ * terminal.c - Terminal state functions
+ */
+
+#ifndef TERMINAL_H
+#define TERMINAL_H
+
+#include "protocol.h"
+
+/**
+ * terminal_init()
+ * Initialize terminal state
+ */
+void terminal_init(void);
+
+/**
+ * terminal_initial_position()
+ * Set terminal initial position after splash screen.
+ */
+void terminal_initial_position(void);
+
+/**
+ * terminal_set_tty(void) - Switch to TTY mode
+ */
+void terminal_set_tty(void);
+
+/**
+ * terminal_set_plato(void) - Switch to PLATO mode
+ */
+void terminal_set_plato(void);
+
+/**
+ * terminal_get_features(void) - Inquire about terminal ASCII features
+ */
+unsigned char terminal_get_features(void);
+
+/**
+ * terminal_get_type(void) - Return the appropriate terminal type
+ */
+unsigned char terminal_get_type(void);
+
+/**
+ * terminal_get_subtype(void) - Return the appropriate terminal subtype
+ */
+unsigned char terminal_get_subtype(void);
+
+/**
+ * terminal_get_load_file(void) - Return the appropriate terminal loadfile (should just be 0)
+ */
+unsigned char terminal_get_load_file(void);
+
+/**
+ * terminal_get_configuration(void) - Return the terminal configuration
+ */
+unsigned char terminal_get_configuration(void);
+
+/**
+ * terminal_get_char_address(void) - Return the base address of the character set.
+ */
+unsigned short terminal_get_char_address(void);
+
+/**
+ * terminal_mem_read - Read a byte of program memory.
+ * not needed for our terminal, but must
+ * be decoded.
+ */
+padByte terminal_mem_read(padWord addr);
+
+/**
+ * terminal_mem_load - Write a byte to non-character memory.
+ * not needed for our terminal, but must be decoded.
+ */
+void terminal_mem_load(padWord addr, padWord value);
+
+/**
+ * terminal_char_load - Store a character into the user definable
+ * character set.
+ */
+void terminal_char_load(padWord charnum, charData theChar);
+
+/**
+ * terminal_mode_5, 6, and 7 are basically stubbed.
+ */
+void terminal_mode_5(padWord value);
+void terminal_mode_6(padWord value);
+void terminal_mode_7(padWord value);
+
+/**
+ * terminal_ext_allow - External Input allowed. Not implemented.
+ */
+void terminal_ext_allow(padBool allow);
+
+/**
+ * terminal_set_ext_in - Set which device to get input from.
+ * Not implemented
+ */
+void terminal_set_ext_in(padWord device);
+
+/**
+ * terminal_set_ext_out - Set which device to send external data to.
+ * Not implemented
+ */
+void terminal_set_ext_out(padWord device);
+
+/**
+ * terminal_ext_in - get an external input from selected device.
+ * Not implemented.
+ */
+padByte terminal_ext_in(void);
+
+/**
+ * terminal_ext_out - Send an external output to selected device
+ * Not implemented.
+ */
+void terminal_ext_out(padByte value);
+
+#endif
diff --git a/touch.c b/touch.c
new file mode 100644
index 0000000..5944670
--- /dev/null
+++ b/touch.c
@@ -0,0 +1,39 @@
+#include "touch.h"
+#include "screen.h"
+
+#define X(x) (x)
+#define Y(y) (y^0x1FF)
+
+padBool lmb=padF;
+padBool lastlmb=padF; /* left mouse button state */
+padBool isAllowed;
+
+/**
+ * touch_init(void)
+ * Initiialize mouse
+ */
+void touch_init(void)
+{
+}
+
+/**
+ * enable/disable mouse cursor
+ */
+void touch_allow(padBool allow)
+{
+}
+
+padBool touch_lmb(void)
+{
+}
+
+void touch_main(void)
+{
+}
+
+/**
+ * touch done
+ */
+void touch_done(void)
+{
+}
diff --git a/touch.h b/touch.h
new file mode 100644
index 0000000..649fc12
--- /dev/null
+++ b/touch.h
@@ -0,0 +1,33 @@
+#ifndef TOUCH_H
+#define TOUCH_H
+
+#include "protocol.h"
+
+/**
+ * touch_init(void)
+ * Initiialize mouse
+ */
+void touch_init(void);
+
+/**
+ * enable/disable mouse cursor
+ */
+void touch_allow(padBool allow);
+
+/**
+ * Is left mouse button pressed?
+ */
+padBool touch_lmb(void);
+
+/**
+ * Get mouse position, and if LMB pressed, send touch event.
+ */
+void touch_main(void);
+
+/**
+ * touch done
+ */
+void touch_done(void);
+
+
+#endif /* TOUCH_H */
diff --git a/trace.c b/trace.c
new file mode 100644
index 0000000..a524ffb
--- /dev/null
+++ b/trace.c
@@ -0,0 +1,52 @@
+/**
+ * PLATOTerm64 - A PLATO Terminal for the Commodore 64
+ * Based on Steve Peltz's PAD
+ * 
+ * Author: Thomas Cherryhomes <thom.cherryhomes at gmail dot com>
+ *
+ * trace.c - Trace output functions.
+ */
+
+#include <string.h>
+#include "protocol.h"
+
+#define true 1
+#define false 0
+
+#define TRACE_FILE "trace.txt"
+
+unsigned char trace_active=false;
+
+static int trace_handle;
+
+/**
+ * trace_open(void)
+ * Open trace file trace.txt
+ */
+void trace_open(void)
+{
+}
+
+/**
+ * trace_append(buf, len)
+ * Append data from ShowPLATO into buffer
+ */
+void trace_append(padByte* buf, int len)
+{
+}
+
+/**
+ * trace_close(void)
+ * Close trace file.
+ */
+void trace_close(void)
+{
+}
+
+/**
+ * trace_toggle(void)
+ * Toggle trace on/off
+ */
+void trace_toggle(void)
+{
+}
diff --git a/trace.h b/trace.h
new file mode 100644
index 0000000..cf5a93c
--- /dev/null
+++ b/trace.h
@@ -0,0 +1,31 @@
+#ifndef TRACE_H
+#define TRACE_H
+
+/**
+ * PLATOTerm64 - A PLATO Terminal for the Commodore 64
+ * Based on Steve Peltz's PAD
+ * 
+ * Author: Thomas Cherryhomes <thom.cherryhomes at gmail dot com>
+ *
+ * trace.h - Trace output functions.
+ */
+
+/**
+ * trace_open(void)
+ * Open trace file trace.txt
+ */
+void trace_open(void);
+
+/**
+ * trace_append(buf, len)
+ * Append data from ShowPLATO into buffer
+ */
+void trace_append(padByte* buf, int len);
+
+/**
+ * trace_close(void)
+ * Close trace file.
+ */
+void trace_close(void);
+
+#endif /* TRACE_H */