From efe842012a876d746a013e58988003f530422686 Mon Sep 17 00:00:00 2001
From: Ralph Moeritz <426109+rmoritz@users.noreply.github.com>
Date: Sat, 16 Dec 2023 16:59:24 +1030
Subject: [PATCH 1/3] Add Krusader ROM & make ROM user configurable

---
 .gitignore            |  12 +++++--
 AUTHORS               |   2 +-
 ChangeLog             |   4 +++
 Makefile.am           |   2 +-
 README                |  34 -------------------
 README.md             |  35 +++++++++++++++++++
 src/configuration.c   |   8 +++++
 src/keyboard.c        |   5 +++
 src/main.c            |   5 ++-
 src/memory.c          |  76 ++++++++++++++++++++++++++++++++----------
 src/memory.h          |   2 ++
 src/pom1.in           |   5 ++-
 src/roms/Makefile.am  |   3 +-
 src/roms/krusader.rom | Bin 0 -> 8192 bytes
 14 files changed, 134 insertions(+), 59 deletions(-)
 delete mode 100644 README
 create mode 100644 README.md
 create mode 100644 src/roms/krusader.rom

diff --git a/.gitignore b/.gitignore
index 70d19ef..28de099 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,13 +1,19 @@
+*~
+INSTALL
+Makefile
+Makefile.in
 aclocal.m4
+autom4te.cache
+compile
+config.guess
 config.h
 config.h.in
 config.log
 config.status
+config.sub
 configure
 depcomp
-INSTALL
 install-sh
-Makefile
-Makefile.in
+ltmain.sh
 missing
 stamp-h1
diff --git a/AUTHORS b/AUTHORS
index 9733d9d..f900d2f 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1,3 +1,3 @@
 John D. Corrado <jdcorrado@gmail.com>
 Verhille Arnaud
-
+Ralph Moeritz
diff --git a/ChangeLog b/ChangeLog
index 75f1bc6..72780ed 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2023-12-17  Ralph Moeritz
+
+	* Added -krusaderRom option (Ctrl+K) to switch between Krusader and BASIC/Monitor ROMs.
+
 Sat Mar 03 12:21:45 EST 2012 jdcorrado
 
   v1.0.0
diff --git a/Makefile.am b/Makefile.am
index 894919b..fecc093 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,7 +2,7 @@ DOC_FILES =				\
 	AUTHORS				\
 	ChangeLog			\
 	NEWS				\
-	README
+	README.md
 
 EXTRA_DIST = $(DOC_FILES)
 
diff --git a/README b/README
deleted file mode 100644
index 4d5e264..0000000
--- a/README
+++ /dev/null
@@ -1,34 +0,0 @@
-Pom1 is an Apple 1 emulator being ported to C from the original Java 
-version. It uses the Simple DirectMedia Layer library and works on most 
-platforms.
-
-== Options ==
-
-Pom1 has many options to configure and utilize the emulator. They are 
-accessed by Ctrl+<letter>. Some options also have corresponding command
-line parameters.
-
-Option         Letter    Parameter             Description
---------------------------------------------------------------------------------------------
-Load Memory    L                               Load memory from a binary or ascii file.
-Save Memory    S                               Save memory to a binary or ascii file.
-Quit           Q                               Quit the emulator.
-Reset          R                               Soft reset the emulator.
-Hard Reset     H                               Hard reset the emulator.
-Pixel Size     P         -pixelsize <n>        Set the pixel size (1 or 2).
-Scanlines      N         -scanlines            Turn scanlines on or off (pixel size 2 only).
-Terminal Speed T         -terminalspeed <n>    Set the terminal speed (Range: 1 - 120).
-RAM 8K         E         -ram8k                Use only 8KB of RAM or entire 64KB of RAM.
-Write In ROM   W         -writeinrom           Allow writing data in ROM or not.
-IRQ/BRK Vector V                               Set address of interrupt vector.
-Fullscreen     F         -fullscreen           Switch to fullscreen or window.
-Blink Cursor   B         -blinkcursor          Set the cursor to blink or not.
-Cursor Block   C         -blockcursor          Set the cursor to block or @.
-Show About     A                               Show version and copyright information.
-
-== Other information ==
-
- * You can find more information about the project at the Pom1 website:
-
-   http://pom1.sourceforge.net/
-
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..02a8f4b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,35 @@
+Pom1 is an Apple 1 emulator ported to C from the original Java
+version. It uses the SDL1 library and works on most platforms.
+
+Options
+===
+
+Pom1 has many options to configure and utilize the emulator. They are
+accessed by Ctrl+<letter>. Some options also have corresponding
+command line parameters.
+
+| Option              | Letter | Parameter          | Description                                    |
+|---------------------|--------|--------------------|------------------------------------------------|
+| Load Memory         | L      |                    | Load memory from a binary or ascii file.       |
+| Save Memory         | S      |                    | Save memory to a binary or ascii file.         |
+| Quit                | Q      |                    | Quit the emulator.                             |
+| Reset               | R      |                    | Soft reset the emulator.                       |
+| Hard Reset          | H      |                    | Hard reset the emulator.                       |
+| Pixel Size          | P      | -pixelsize <n>     | Set the pixel size (1 or 2).                   |
+| Scanlines           | N      | -scanlines         | Turn scanlines on or off (pixel size 2 only).  |
+| Terminal Speed      | T      | -terminalspeed <n> | Set the terminal speed (Range: 1 - 120).       |
+| RAM 8K              | E      | -ram8k             | Use only 8KB of RAM or entire 64KB of RAM.     |
+| Write In ROM        | W      | -writeinrom        | Allow writing data in ROM or not.              |
+| IRQ/BRK Vector      | V      |                    | Set address of interrupt vector.               |
+| Fullscreen          | F      | -fullscreen        | Switch to fullscreen or window.                |
+| Blink Cursor        | B      | -blinkcursor       | Set the cursor to blink or not.                |
+| Cursor Block        | C      | -blockcursor       | Set the cursor to block or @.                  |
+| Show About          | A      |                    | Show version and copyright information.        |
+| Toggle Krusader ROM | K      | -krusaderRom       | Toggle between Krusader and BASIC/Monitor ROMs |
+
+Before exiting, Pom1 writes its configuration options to `$HOME/.pom1/pom1.cfg`
+
+Other information
+===
+
+- You can find more information about the project at the Pom1 website: http://pom1.sourceforge.net/
diff --git a/src/configuration.c b/src/configuration.c
index 374b9fc..39ec5d0 100644
--- a/src/configuration.c
+++ b/src/configuration.c
@@ -98,6 +98,8 @@ void loadConfiguration(void)
 				setBlinkCursor(value[0] & 0x01);
 			else if (!strcmp(buffer, "blockCursor"))
 				setBlockCursor(value[0] & 0x01);
+			else if (!strcmp(buffer, "krusaderRom"))
+			  setKrusaderRom((value[0] & 0x01));
 		}
 
 		fclose(fp);
@@ -181,6 +183,12 @@ void saveConfiguration(void)
 		buffer[14] = '\0';
 		fputs(buffer, fp);
 
+		strcpy(buffer, "krusaderRom=");
+		buffer[12] = getKrusaderRom() | 0x30;
+		buffer[13] = '\n';
+		buffer[14] = '\0';
+		fputs(buffer, fp);
+
 		fclose(fp);
 	}
 }
diff --git a/src/keyboard.c b/src/keyboard.c
index 33afff2..bab4052 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -192,6 +192,11 @@ int handleInput(void)
 				showAbout();
 				return 1;
 			}
+			else if (event.key.keysym.sym == SDLK_k) {
+			  setKrusaderRom(!getKrusaderRom());
+			  printf("stdout: krusaderRom=%d\n", getKrusaderRom());
+			  return 1;
+			}
 		}
 
 		if (readKbdCr() == 0x27 && !_fp && event.type == SDL_KEYDOWN && !(event.key.keysym.unicode & 0xFF80) && event.key.keysym.unicode)
diff --git a/src/main.c b/src/main.c
index 88c5297..8507af1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -62,9 +62,10 @@ int main(int argc, char *argv[])
 					setPixelSize(temp);
 				}
 			}
-			else if (!strcasecmp("-scanlines", argv[i]))
+			else if (!strcasecmp("-scanlines", argv[i])) {
 				if (getPixelSize() > 1)
 					setScanlines(1);
+			}
 			else if (!strcasecmp("-terminalspeed", argv[i]) && i + 1 < argc)
 			{
 				temp = atoi(argv[i + 1]);
@@ -82,6 +83,8 @@ int main(int argc, char *argv[])
 				setBlinkCursor(1);
 			else if (!strcasecmp("-blockcursor", argv[i]))
 				setBlockCursor(1);
+			else if (!strcasecmp("-krusaderrom", argv[i]))
+			  setKrusaderRom(1);
 		}
 	}
 
diff --git a/src/memory.c b/src/memory.c
index dce1faa..3aee936 100644
--- a/src/memory.c
+++ b/src/memory.c
@@ -21,9 +21,12 @@
 #include <string.h>
 #include "configuration.h"
 #include "pia6820.h"
+#include "memory.h"
 
-static unsigned char mem[65536];
-static int ram8k = 0, writeInRom = 1;
+static unsigned char mem[0x10000]; // 64K
+static int ram8k = 0;
+static int writeInRom = 1;
+static int krusaderRom = 0;
 
 static int loadMonitor(void)
 {
@@ -40,7 +43,7 @@ static int loadMonitor(void)
 
 	if (fp)
 	{
-		fread(&mem[0xFF00], 1, 256, fp);
+		fread(&mem[0xFF00], 1, 0x100, fp);
 		fclose(fp);
 	}
 	else
@@ -64,7 +67,7 @@ static int loadBasic(void)
 
 	if (fp)
 	{
-		fread(&mem[0xE000], 1, 4096, fp);
+		fread(&mem[0xE000], 1, 0x1000, fp);
 		fclose(fp);
 	}
 	else
@@ -73,22 +76,61 @@ static int loadBasic(void)
 	return 1;
 }
 
+static int loadKrusader() {
+  const char *romdir = getRomDirectory();
+  char *filename;
+  FILE *fp;
+  
+  filename = (char *)malloc(strlen(romdir) + 14);
+  sprintf(filename, "%s/krusader.rom", romdir);
+
+  fp = fopen(filename, "rb");
+
+  free(filename);
+
+  if (fp) {
+    fread(&mem[0xE000], 1, 0x2000, fp);
+    fclose(fp);
+  }
+  else {
+    return 0;
+  }
+
+  return 1;
+}
+
+static void loadRoms() {
+  if (krusaderRom) {
+    if (!loadKrusader()) {
+      fprintf(stderr, "stderr: Could not load krusader\n");
+      exit(1);
+    }
+  }
+  else {
+    if (!loadMonitor()) {
+      fprintf(stderr, "stderr: Could not load monitor\n");
+      exit(1);
+    }
+
+    if (!loadBasic()) {
+      fprintf(stderr, "stderr: Could not load basic\n");
+      exit(1);
+    }
+  }
+}
+
+int getKrusaderRom() {
+  return krusaderRom;
+}
+
+void setKrusaderRom(int b) {
+  krusaderRom = b;
+}
 
 void resetMemory(void)
 {
-	memset(mem, 0, 57344);
-	
-	if (!loadMonitor())
-	{
-		fprintf(stderr, "stderr: Could not load monitor\n");
-		exit(1);
-	}
-
-	if (!loadBasic())
-	{
-		fprintf(stderr, "stderr: Could not load basic\n");
-		exit(1);
-	}
+	memset(mem, 0, 0xE000);
+	loadRoms();
 }
 
 void setRam8k(int b)
diff --git a/src/memory.h b/src/memory.h
index 50aed7f..7931685 100644
--- a/src/memory.h
+++ b/src/memory.h
@@ -19,6 +19,8 @@
 #ifndef __MEMORY_H__
 #define __MEMORY_H__
 
+int getKrusaderRom();
+void setKrusaderRom(int b);
 void resetMemory(void);
 void setRam8k(int b);
 int getRam8k(void);
diff --git a/src/pom1.in b/src/pom1.in
index 4b1059f..2428c95 100644
--- a/src/pom1.in
+++ b/src/pom1.in
@@ -2,4 +2,7 @@
 
 export POM1ROMDIR="@prefix@/share/@PACKAGE@/roms"
 
-pom1-@PACKAGE_VERSION@ $@
+SCRIPT=$(readlink -f "$0")
+SCRIPTDIR=$(dirname "$SCRIPT")
+
+$SCRIPTDIR/pom1-@PACKAGE_VERSION@ $@
diff --git a/src/roms/Makefile.am b/src/roms/Makefile.am
index 121f2c0..e7d705a 100644
--- a/src/roms/Makefile.am
+++ b/src/roms/Makefile.am
@@ -1,7 +1,8 @@
 ROMFILES =				\
 	basic.rom			\
 	charmap.rom			\
-	monitor.rom
+	monitor.rom			\
+	krusader.rom
 
 romdir = $(prefix)/share/@PACKAGE@/roms
 rom_DATA = $(ROMFILES)
diff --git a/src/roms/krusader.rom b/src/roms/krusader.rom
new file mode 100644
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literal 0
HcmV?d00001


From f9e3a79a18c10a0e4f7029577c422bf53741e8c9 Mon Sep 17 00:00:00 2001
From: Ralph Moeritz <426109+rmoritz@users.noreply.github.com>
Date: Sun, 17 Dec 2023 11:02:29 +1030
Subject: [PATCH 2/3] Add instructions for building

---
 .gitignore   |  1 +
 README.md    | 22 ++++++++++++++++++++--
 configure.ac |  1 +
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index 28de099..a15654a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,5 +15,6 @@ configure
 depcomp
 install-sh
 ltmain.sh
+m4
 missing
 stamp-h1
diff --git a/README.md b/README.md
index 02a8f4b..21becf8 100644
--- a/README.md
+++ b/README.md
@@ -27,9 +27,27 @@ command line parameters.
 | Show About          | A      |                    | Show version and copyright information.        |
 | Toggle Krusader ROM | K      | -krusaderRom       | Toggle between Krusader and BASIC/Monitor ROMs |
 
-Before exiting, Pom1 writes its configuration options to `$HOME/.pom1/pom1.cfg`
+Before exiting, Pom1 writes its configuration options to
+`$HOME/.pom1/pom1.cfg`; you can modify options directly in this file as well.
+
+Building
+===
+
+Generate the `configure` script:
+
+	$ libtoolize --force
+	$ aclocal
+	$ autoheader
+	$ automake --force-missing --add-missing
+	$ autoconf
+
+After that's it's just the usual:
+
+	$ ./configure
+	$ make
+	$ make install
 
 Other information
 ===
 
-- You can find more information about the project at the Pom1 website: http://pom1.sourceforge.net/
+You can find more information about the project at the Pom1 website: http://pom1.sourceforge.net/
diff --git a/configure.ac b/configure.ac
index e747a52..5a7de76 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,6 @@
 AC_PREREQ([2.68])
 AC_INIT([Pom1 Apple 1 Emulator], [1.0.0], [jdcorrado@gmail.com], [pom1])
+AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src/main.c])
 AC_CONFIG_HEADERS([config.h])
 

From fc2f8ab57b1e00544c83f5adf640a3c0fda7e82d Mon Sep 17 00:00:00 2001
From: Ralph Moeritz <426109+rmoritz@users.noreply.github.com>
Date: Sun, 17 Dec 2023 17:58:21 +1030
Subject: [PATCH 3/3] Reset all memory up to $FFFF

---
 src/memory.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/memory.c b/src/memory.c
index 3aee936..a26c449 100644
--- a/src/memory.c
+++ b/src/memory.c
@@ -127,10 +127,9 @@ void setKrusaderRom(int b) {
   krusaderRom = b;
 }
 
-void resetMemory(void)
-{
-	memset(mem, 0, 0xE000);
-	loadRoms();
+void resetMemory(void) {
+  memset(mem, 0, 0xFFFF);
+  loadRoms();
 }
 
 void setRam8k(int b)