From b46cb7b8ab96c8321f12767a92eb703447c6a9e4 Mon Sep 17 00:00:00 2001 From: "John D. Corrado" Date: Fri, 31 Jul 2015 13:28:40 -0400 Subject: [PATCH] Initial commit --- .gitignore | 13 + AUTHORS | 3 + COPYING | 340 ++++++++ ChangeLog | 36 + Makefile.am | 13 + NEWS | 18 + README | 34 + configure.ac | 40 + src/.gitignore | 7 + src/Makefile.am | 27 + src/configuration.c | 186 +++++ src/configuration.h | 28 + src/keyboard.c | 213 +++++ src/keyboard.h | 28 + src/m6502.c | 1816 ++++++++++++++++++++++++++++++++++++++++++ src/m6502.h | 31 + src/main.c | 131 +++ src/memory.c | 174 ++++ src/memory.h | 32 + src/options.c | 687 ++++++++++++++++ src/options.h | 29 + src/pia6820.c | 72 ++ src/pia6820.h | 32 + src/pom1.desktop.in | 7 + src/pom1.in | 5 + src/pom1.png | Bin 0 -> 264 bytes src/roms/.gitignore | 2 + src/roms/Makefile.am | 9 + src/roms/basic.rom | Bin 0 -> 4096 bytes src/roms/charmap.rom | Bin 0 -> 1024 bytes src/roms/monitor.rom | Bin 0 -> 256 bytes src/screen.c | 283 +++++++ src/screen.h | 42 + 33 files changed, 4338 insertions(+) create mode 100644 .gitignore create mode 100644 AUTHORS create mode 100644 COPYING create mode 100644 ChangeLog create mode 100644 Makefile.am create mode 100644 NEWS create mode 100644 README create mode 100644 configure.ac create mode 100644 src/.gitignore create mode 100644 src/Makefile.am create mode 100644 src/configuration.c create mode 100644 src/configuration.h create mode 100644 src/keyboard.c create mode 100644 src/keyboard.h create mode 100644 src/m6502.c create mode 100644 src/m6502.h create mode 100644 src/main.c create mode 100644 src/memory.c create mode 100644 src/memory.h create mode 100644 src/options.c create mode 100644 src/options.h create mode 100644 src/pia6820.c create mode 100644 src/pia6820.h create mode 100644 src/pom1.desktop.in create mode 100644 src/pom1.in create mode 100644 src/pom1.png create mode 100644 src/roms/.gitignore create mode 100644 src/roms/Makefile.am create mode 100644 src/roms/basic.rom create mode 100644 src/roms/charmap.rom create mode 100644 src/roms/monitor.rom create mode 100644 src/screen.c create mode 100644 src/screen.h diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..70d19ef --- /dev/null +++ b/.gitignore @@ -0,0 +1,13 @@ +aclocal.m4 +config.h +config.h.in +config.log +config.status +configure +depcomp +INSTALL +install-sh +Makefile +Makefile.in +missing +stamp-h1 diff --git a/AUTHORS b/AUTHORS new file mode 100644 index 0000000..9733d9d --- /dev/null +++ b/AUTHORS @@ -0,0 +1,3 @@ +John D. Corrado +Verhille Arnaud + diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..d60c31a --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Library General Public License instead.) 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/ChangeLog b/ChangeLog new file mode 100644 index 0000000..75f1bc6 --- /dev/null +++ b/ChangeLog @@ -0,0 +1,36 @@ +Sat Mar 03 12:21:45 EST 2012 jdcorrado + + v1.0.0 + Optimized options code and added better error handling. + Load option now has option to simulate keyboard input for ASCII format. + Added show about option. + Added command line parameters. + +Mon Aug 16 16:06:48 EST 2010 jdcorrado + + v0.0.5 + Added mutexes to protect access to screen and to lock/unlock blinking cursor. + +Sat Aug 14 22:49:55 EST 2010 jdcorrado + + v0.0.4 + Fixed input and output of valid characters. + Added optional cursor (block or @) and blinking. + +Tue May 15 19:40:03 EST 2007 jdcorrado + + v0.0.3 + Fixed problems with certain addressing modes where zero page would not wrap around. + +Tue Feb 27 20:49:21 EST 2007 jdcorrado + + v0.0.2 + Fixed problems from signed types. + Moved updateScreen call. + Set BRK flag instead of IRQ flag in BRK function (Thanks Kallikak). + Other minor code changes. + +Fri Sep 29 23:01:37 EST 2006 jdcorrado + + v0.0.1 + diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..894919b --- /dev/null +++ b/Makefile.am @@ -0,0 +1,13 @@ +DOC_FILES = \ + AUTHORS \ + ChangeLog \ + NEWS \ + README + +EXTRA_DIST = $(DOC_FILES) + +docdir = $(prefix)/share/doc/@PACKAGE@ +doc_DATA = $(DOC_FILES) + +SUBDIRS = src +DIST_SUBDIRS = src diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..bd8163c --- /dev/null +++ b/NEWS @@ -0,0 +1,18 @@ +1.0.0 (2012-03-03): + First stable release. + +0.0.5 (2010-08-16): + Fifth beta release. + +0.0.4 (2010-08-14): + Fourth beta release. + +0.0.3 (2007-05-16): + Third beta release. + +0.0.2 (2007-02-27): + Second beta release. + +0.0.1 (2006-09-29): + First beta release. + diff --git a/README b/README new file mode 100644 index 0000000..4d5e264 --- /dev/null +++ b/README @@ -0,0 +1,34 @@ +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+. 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 Set the pixel size (1 or 2). +Scanlines N -scanlines Turn scanlines on or off (pixel size 2 only). +Terminal Speed T -terminalspeed 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/configure.ac b/configure.ac new file mode 100644 index 0000000..e747a52 --- /dev/null +++ b/configure.ac @@ -0,0 +1,40 @@ +AC_PREREQ([2.68]) +AC_INIT([Pom1 Apple 1 Emulator], [1.0.0], [jdcorrado@gmail.com], [pom1]) +AC_CONFIG_SRCDIR([src/main.c]) +AC_CONFIG_HEADERS([config.h]) + +PACKAGE_SHORTDESC="Apple 1 emulator" +PACKAGE_COPYRIGHT="Copyright (C) 2000-2012" +PACKAGE_LICENSE="GNU General Public License, version 2" +PACKAGE_MAINTAINER="John D. Corrado" +PACKAGE_URL="http://pom1.sourceforge.net/" + +AC_PROG_CC +AC_PROG_INSTALL + +AC_CHECK_HEADERS([stdlib.h string.h]) + +AC_FUNC_MALLOC +AC_CHECK_FUNCS([atexit memset mkdir strcasecmp strdup strrchr]) + +AM_PATH_SDL([1.1.3]) + +CFLAGS="$CFLAGS $SDL_CFLAGS" +LDFLAGS="$LDFLAGS $SDL_LIBS" + +AM_INIT_AUTOMAKE([1.8.0]) + +AC_SUBST([PACKAGE_SHORTDESC]) +AC_SUBST([PACKAGE_COPYRIGHT]) +AC_SUBST([PACKAGE_LICENSE]) +AC_SUBST([PACKAGE_MAINTAINER]) +AC_SUBST([PACKAGE_URL]) + +AC_CONFIG_FILES([ +Makefile +src/Makefile +src/pom1.desktop +src/roms/Makefile +src/pom1 +]) +AC_OUTPUT diff --git a/src/.gitignore b/src/.gitignore new file mode 100644 index 0000000..8890834 --- /dev/null +++ b/src/.gitignore @@ -0,0 +1,7 @@ +Makefile +Makefile.in +pom1 +pom1-1.0.0 +pom1.desktop +.deps +*.o diff --git a/src/Makefile.am b/src/Makefile.am new file mode 100644 index 0000000..0d0a782 --- /dev/null +++ b/src/Makefile.am @@ -0,0 +1,27 @@ +EXEEXT=-@PACKAGE_VERSION@ +bin_PROGRAMS = pom1 +bin_SCRIPTS = pom1 + +SOURCE_FILES = \ + configuration.c configuration.h \ + keyboard.c keyboard.h \ + m6502.c m6502.h \ + main.c \ + memory.c memory.h \ + options.c options.h \ + pia6820.c pia6820.h \ + screen.c screen.h + +pom1_SOURCES = $(SOURCE_FILES) +pom1_LDADD = @LDFLAGS@ + +EXTRA_DIST = pom1.png + +appdir = $(prefix)/share/applications +app_DATA = pom1.desktop + +iconsdir = $(prefix)/share/icons +icons_DATA = pom1.png + +SUBDIRS = roms +DIST_SUBDIRS = roms diff --git a/src/configuration.c b/src/configuration.c new file mode 100644 index 0000000..374b9fc --- /dev/null +++ b/src/configuration.c @@ -0,0 +1,186 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#include +#include +#include +#include "screen.h" +#include "memory.h" + +static char *_romdir; + +void freeRomDirectory(void) +{ + free(_romdir); +} + +void setRomDirectory(const char *romdir) +{ + if (_romdir) + free(_romdir); + + _romdir = strdup(romdir); +} + +const char *getRomDirectory(void) +{ + return _romdir; +} + +void loadConfiguration(void) +{ + FILE *fp; + char *configdir, *filename, buffer[256], *value; + +#if !defined(_WIN32) + char *homedir = getenv("HOME"); + + if (homedir) + { + configdir = (char *)malloc(strlen(homedir) + 8); + sprintf(configdir, "%s/.pom1/", homedir); + } + else +#endif + configdir = strdup(""); + + filename = (char *)malloc(strlen(configdir) + 9); + sprintf(filename, "%spom1.cfg", configdir); + + free(configdir); + + fp = fopen(filename, "r"); + + free(filename); + + if (fp) + { + while (!feof(fp)) + { + if (!fgets(buffer, 256, fp)) + continue; + + if (buffer[0] == '/' || buffer[0] == '\n') + continue; + + *(strrchr(buffer, '\n')) = '\0'; + value = strrchr(buffer, '=') + 1; + *(strrchr(buffer, '=')) = '\0'; + + if (!strcmp(buffer, "pixelSize")) + setPixelSize(value[0] & 0x03); + else if (!strcmp(buffer, "scanlines")) + setScanlines(value[0] & 0x01); + else if (!strcmp(buffer, "terminalSpeed")) + setTerminalSpeed(atoi(value)); + else if (!strcmp(buffer, "ram8k")) + setRam8k(value[0] & 0x01); + else if (!strcmp(buffer, "writeInRom")) + setWriteInRom(value[0] & 0x01); + else if (!strcmp(buffer, "fullscreen")) + setFullscreen(value[0] & 0x01); + else if (!strcmp(buffer, "blinkCursor")) + setBlinkCursor(value[0] & 0x01); + else if (!strcmp(buffer, "blockCursor")) + setBlockCursor(value[0] & 0x01); + } + + fclose(fp); + } +} + +void saveConfiguration(void) +{ + FILE *fp; + char *configdir, *filename, buffer[256]; + +#if !defined(_WIN32) + char *homedir = getenv("HOME"); + + if (homedir) + { + configdir = (char *)malloc(strlen(homedir) + 8); + sprintf(configdir, "%s/.pom1/", homedir); + mkdir(configdir, 0755); + } + else +#endif + configdir = strdup(""); + + filename = (char *)malloc(strlen(configdir) + 9); + sprintf(filename, "%spom1.cfg", configdir); + + free(configdir); + + fp = fopen(filename, "w"); + + free(filename); + + if (fp) + { + fputs("// Pom1 Configuration\n", fp); + + strcpy(buffer, "pixelSize="); + buffer[10] = getPixelSize() | 0x30; + buffer[11] = '\n'; + buffer[12] = '\0'; + fputs(buffer, fp); + + strcpy(buffer, "scanlines="); + buffer[10] = getScanlines() | 0x30; + buffer[11] = '\n'; + buffer[12] = '\0'; + fputs(buffer, fp); + + strcpy(buffer, "terminalSpeed="); + sprintf(&buffer[14], "%d\n", getTerminalSpeed()); + fputs(buffer, fp); + + strcpy(buffer, "ram8k="); + buffer[6] = getRam8k() | 0x30; + buffer[7] = '\n'; + buffer[8] = '\0'; + fputs(buffer, fp); + + strcpy(buffer, "writeInRom="); + buffer[11] = getWriteInRom() | 0x30; + buffer[12] = '\n'; + buffer[13] = '\0'; + fputs(buffer, fp); + + strcpy(buffer, "fullscreen="); + buffer[11] = getFullscreen() | 0x30; + buffer[12] = '\n'; + buffer[13] = '\0'; + fputs(buffer, fp); + + strcpy(buffer, "blinkCursor="); + buffer[12] = getBlinkCursor() | 0x30; + buffer[13] = '\n'; + buffer[14] = '\0'; + fputs(buffer, fp); + + strcpy(buffer, "blockCursor="); + buffer[12] = getBlockCursor() | 0x30; + buffer[13] = '\n'; + buffer[14] = '\0'; + fputs(buffer, fp); + + fclose(fp); + } +} diff --git a/src/configuration.h b/src/configuration.h new file mode 100644 index 0000000..adc6e96 --- /dev/null +++ b/src/configuration.h @@ -0,0 +1,28 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#ifndef __CONFIGURATION_H__ +#define __CONFIGURATION_H__ + +void freeRomDirectory(void); +void setRomDirectory(const char *romdir); +const char *getRomDirectory(void); +void loadConfiguration(void); +void saveConfiguration(void); + +#endif diff --git a/src/keyboard.c b/src/keyboard.c new file mode 100644 index 0000000..33afff2 --- /dev/null +++ b/src/keyboard.c @@ -0,0 +1,213 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#include "SDL.h" +#include "m6502.h" +#include "memory.h" +#include "options.h" +#include "pia6820.h" +#include "screen.h" + +static FILE *_fp; +static const char *_filename; +static char buffer[1024]; +static int i, length; + +void setInputFile(FILE *fp, const char *filename) +{ + _fp = fp; + _filename = filename; + i = length = 0; +} + +void closeInputFile(void) +{ + if (_fp) + { + fclose(_fp); + _fp = NULL; + } +} + +int isInputFileOpen(void) +{ + return (_fp ? 1 : 0); +} + +const char *getInputFileName(void) +{ + return _filename; +} + +int handleInput(void) +{ + SDL_Event event; + unsigned char tmp; + + if (readKbdCr() == 0x27 && _fp) + { + if (i < length) + { + tmp = buffer[i++]; + + if (tmp >= 0x61 && tmp <= 0x7A) + tmp &= 0x5F; + else if (tmp == 0x0D) + i++; + else if (tmp == 0x0A) + tmp = 0x0D; + + if (tmp < 0x60) + { + writeKbd((unsigned char)(tmp | 0x80)); + writeKbdCr(0xA7); + } + } + else if (feof(_fp)) + { + closeInputFile(); + printf("stdout: Successfully loaded \"%s\"\n", _filename); + } + else + { + i = 0; + length = fread(buffer, 1, 1024, _fp); + } + } + + while (SDL_PollEvent(&event)) + { + if (event.type == SDL_QUIT) + return 0; + + if (event.type == SDL_KEYDOWN && event.key.keysym.mod & KMOD_CTRL) + { + if (event.key.keysym.sym == SDLK_l) + { + loadMemory(); + return 1; + } + else if (event.key.keysym.sym == SDLK_s) + { + saveMemory(); + return 1; + } + else if (event.key.keysym.sym == SDLK_q) + return 0; + else if (event.key.keysym.sym == SDLK_r) + { + resetPia6820(); + resetM6502(); + return 1; + } + else if (event.key.keysym.sym == SDLK_h) + { + stopM6502(); + resetM6502(); + resetScreen(); + resetPia6820(); + resetMemory(); + startM6502(); + return 1; + } + else if (event.key.keysym.sym == SDLK_p) + { + changePixelSize(); + return 1; + } + else if (event.key.keysym.sym == SDLK_n) + { + if (getPixelSize() > 1) + { + setScanlines(!getScanlines()); + printf("stdout: scanlines=%d\n", getScanlines()); + redrawScreen(); + } + + return 1; + } + else if (event.key.keysym.sym == SDLK_t) + { + changeTerminalSpeed(); + return 1; + } + else if (event.key.keysym.sym == SDLK_e) + { + setRam8k(!getRam8k()); + printf("stdout: ram8k=%d\n", getRam8k()); + return 1; + } + else if (event.key.keysym.sym == SDLK_w) + { + setWriteInRom(!getWriteInRom()); + printf("stdout: writeInRom=%d\n", getWriteInRom()); + return 1; + } + else if (event.key.keysym.sym == SDLK_v) + { + setIrqBrkVector(); + return 1; + } + else if (event.key.keysym.sym == SDLK_f) + { + setFullscreen(!getFullscreen()); + printf("stdout: fullscreen=%d\n", getFullscreen()); + SDL_SetVideoMode(280 * getPixelSize(), 192 * getPixelSize(), 8, SDL_HWSURFACE | (getFullscreen() ? SDL_FULLSCREEN : 0)); + initScreen(); + SDL_ShowCursor(!getFullscreen()); + redrawScreen(); + return 1; + } + else if (event.key.keysym.sym == SDLK_b) + { + setBlinkCursor(!getBlinkCursor()); + printf("stdout: blinkCursor=%d\n", getBlinkCursor()); + redrawScreen(); + return 1; + } + else if (event.key.keysym.sym == SDLK_c) + { + setBlockCursor(!getBlockCursor()); + printf("stdout: blockCursor=%d\n", getBlockCursor()); + redrawScreen(); + return 1; + } + else if (event.key.keysym.sym == SDLK_a) + { + showAbout(); + return 1; + } + } + + if (readKbdCr() == 0x27 && !_fp && event.type == SDL_KEYDOWN && !(event.key.keysym.unicode & 0xFF80) && event.key.keysym.unicode) + { + tmp = event.key.keysym.unicode & 0x7F; + + if (tmp >= 0x61 && tmp <= 0x7A) + tmp &= 0x5F; + + if (tmp < 0x60) + { + writeKbd((unsigned char)(tmp | 0x80)); + writeKbdCr(0xA7); + } + } + } + + return 1; +} diff --git a/src/keyboard.h b/src/keyboard.h new file mode 100644 index 0000000..8905af7 --- /dev/null +++ b/src/keyboard.h @@ -0,0 +1,28 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#ifndef __KEYBOARD_H__ +#define __KEYBOARD_H__ + +void setInputFile(FILE *fd, const char *filename); +void closeInputFile(void); +int isInputFileOpen(void); +const char *getInputFileName(void); +int handleInput(void); + +#endif diff --git a/src/m6502.c b/src/m6502.c new file mode 100644 index 0000000..964dda2 --- /dev/null +++ b/src/m6502.c @@ -0,0 +1,1816 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#include "SDL.h" +#include "memory.h" + +#define N 0x80 +#define V 0x40 +#define B 0x10 +#define D 0x08 +#define I 0x04 +#define Z 0x02 +#define C 0x01 + +static unsigned char accumulator, xRegister, yRegister, statusRegister = 0x24, stackPointer; +static int IRQ = 0, NMI = 0; +static unsigned short programCounter; +static unsigned char btmp; +static unsigned short op, opH, opL, ptr, ptrH, ptrL, tmp; +static long lastTime; +static int cycles, cyclesBeforeSynchro, _synchroMillis; +static SDL_Thread *thread; +static int running; + +static unsigned short memReadAbsolute(unsigned short adr) +{ + return (memRead(adr) | memRead((unsigned short)(adr + 1)) << 8); +} + +static void synchronize(void) +{ + int realTimeMillis = SDL_GetTicks() - lastTime; + int sleepMillis = _synchroMillis - realTimeMillis; + + if (sleepMillis < 0) + sleepMillis = 5; + + SDL_Delay(sleepMillis); + + lastTime = SDL_GetTicks(); +} + +static void pushProgramCounter(void) +{ + memWrite((unsigned short)(stackPointer + 0x100), (unsigned char)(programCounter >> 8)); + stackPointer--; + memWrite((unsigned short)(stackPointer + 0x100), (unsigned char)programCounter); + stackPointer--; + cycles += 2; +} + +static void popProgramCounter(void) +{ + stackPointer++; + programCounter = memRead((unsigned short)(stackPointer + 0x100)); + stackPointer++; + programCounter += memRead((unsigned short)(stackPointer + 0x100)) << 8; + cycles += 2; +} + +static void handleIRQ(void) +{ + pushProgramCounter(); + memWrite((unsigned short)(0x100 + stackPointer), (unsigned char)(statusRegister & ~0x10)); + stackPointer--; + statusRegister |= I; + programCounter = memReadAbsolute(0xFFFE); + cycles += 8; +} + +static void handleNMI(void) +{ + pushProgramCounter(); + memWrite((unsigned short)(0x100 + stackPointer), (unsigned char)(statusRegister & ~0x10)); + stackPointer--; + statusRegister |= I; + NMI = 0; + programCounter = memReadAbsolute(0xFFFA); + cycles += 8; +} + +static void Imp(void) +{ + cycles++; +} + +static void Imm(void) +{ + op = programCounter++; +} + +static void Zero(void) +{ + op = memRead(programCounter++); + cycles++; +} + +static void ZeroX(void) +{ + op = memRead(programCounter++) + xRegister & 0xFF; + cycles++; +} + +static void ZeroY(void) +{ + op = memRead(programCounter++) + yRegister & 0xFF; + cycles++; +} + +static void Abs(void) +{ + op = memReadAbsolute(programCounter); + programCounter += 2; + cycles += 2; +} + +static void AbsX(void) +{ + opL = memRead(programCounter++) + xRegister; + opH = memRead(programCounter++) << 8; + cycles += 2; + + if (opL & 0x100) + cycles++; + + op = opH + opL; +} + +static void AbsY(void) +{ + opL = memRead(programCounter++) + yRegister; + opH = memRead(programCounter++) << 8; + cycles += 2; + + if (opL & 0x100) + cycles++; + + op = opH + opL; +} + +static void Ind(void) +{ + ptrL = memRead(programCounter++); + ptrH = memRead(programCounter++) << 8; + op = memRead((unsigned short)(ptrH + ptrL)); + ptrL = ptrL + 1 & 0xFF; + op += memRead((unsigned short)(ptrH + ptrL)) << 8; + cycles += 4; +} + +static void IndZeroX(void) +{ + ptr = memRead(programCounter++) + xRegister & 0xFF; + op = memRead(ptr); + op += memRead((unsigned short)(ptr + 1 & 0xFF)) << 8; + cycles += 3; +} + +static void IndZeroY(void) +{ + ptr = memRead(programCounter++); + opL = memRead(ptr) + yRegister; + opH = memRead((unsigned short)(ptr + 1 & 0xFF)) << 8; + cycles += 3; + + if (opL & 0x100) + cycles++; + + op = opH + opL; +} + +static void Rel(void) +{ + op = memRead(programCounter++); + + if (op & 0x80) + op |= 0xFF00; + + op += programCounter; + cycles++; +} + +static void WAbsX(void) +{ + opL = memRead(programCounter++) + xRegister; + opH = memRead(programCounter++) << 8; + cycles += 3; + op = opH + opL; +} + +static void WAbsY(void) +{ + opL = memRead(programCounter++) + yRegister; + opH = memRead(programCounter++) << 8; + cycles += 3; + op = opH + opL; +} + +static void WIndZeroY(void) +{ + ptr = memRead(programCounter++); + opL = memRead(ptr) + yRegister; + opH = memRead((unsigned short)(ptr + 1 & 0xFF)) << 8; + cycles += 4; + op = opH + opL; +} + +static void setStatusRegisterNZ(unsigned char val) +{ + if (val & 0x80) + statusRegister |= N; + else + statusRegister &= ~N; + + if (!val) + statusRegister |= Z; + else + statusRegister &= ~Z; +} + +static void LDA(void) +{ + accumulator = memRead(op); + setStatusRegisterNZ(accumulator); + cycles++; +} + +static void LDX(void) +{ + xRegister = memRead(op); + setStatusRegisterNZ(xRegister); + cycles++; +} + +static void LDY(void) +{ + yRegister = memRead(op); + setStatusRegisterNZ(yRegister); + cycles++; +} + +static void STA(void) +{ + memWrite(op, accumulator); + cycles++; +} + +static void STX(void) +{ + memWrite(op, xRegister); + cycles++; +} + +static void STY(void) +{ + memWrite(op, yRegister); + cycles++; +} + +static void setFlagCarry(unsigned short val) +{ + if (val & 0x100) + statusRegister |= C; + else + statusRegister &= ~C; +} + +static void ADC(void) +{ + unsigned short Op1 = accumulator, Op2 = memRead(op); + cycles++; + + if (statusRegister & D) + { + if (!(Op1 + Op2 + (statusRegister & C ? 1 : 0) & 0xFF)) + statusRegister |= Z; + else + statusRegister &= ~Z; + + tmp = (Op1 & 0x0F) + (Op2 & 0x0F) + (statusRegister & C ? 1 : 0); + accumulator = tmp < 0x0A ? tmp : tmp + 6; + tmp = (Op1 & 0xF0) + (Op2 & 0xF0) + (tmp & 0xF0); + + if (tmp & 0x80) + statusRegister |= N; + else + statusRegister &= ~N; + + if ((Op1 ^ tmp) & ~(Op1 ^ Op2) & 0x80) + statusRegister |= V; + else + statusRegister &= ~V; + + tmp = (accumulator & 0x0F) | (tmp < 0xA0 ? tmp : tmp + 0x60); + + if (tmp & 0x100) + statusRegister |= C; + else + statusRegister &= ~C; + + accumulator = tmp & 0xFF; + } + else + { + tmp = Op1 + Op2 + (statusRegister & C ? 1 : 0); + accumulator = tmp & 0xFF; + + if ((Op1 ^ accumulator) & ~(Op1 ^ Op2) & 0x80) + statusRegister |= V; + else + statusRegister &= ~V; + + setFlagCarry(tmp); + setStatusRegisterNZ(accumulator); + } +} + +static void setFlagBorrow(unsigned short val) +{ + if (!(val & 0x100)) + statusRegister |= C; + else + statusRegister &= ~C; +} + +static void SBC(void) +{ + unsigned short Op1 = accumulator, Op2 = memRead(op); + cycles++; + + if (statusRegister & D) + { + tmp = (Op1 & 0x0F) - (Op2 & 0x0F) - (statusRegister & C ? 0 : 1); + accumulator = !(tmp & 0x10) ? tmp : tmp - 6; + tmp = (Op1 & 0xF0) - (Op2 & 0xF0) - (accumulator & 0x10); + accumulator = (accumulator & 0x0F) | (!(tmp & 0x100) ? tmp : tmp - 0x60); + tmp = Op1 - Op2 - (statusRegister & C ? 0 : 1); + setFlagBorrow(tmp); + setStatusRegisterNZ((unsigned char)tmp); + } + else + { + tmp = Op1 - Op2 - (statusRegister & C ? 0 : 1); + accumulator = tmp & 0xFF; + + if ((Op1 ^ Op2) & (Op1 ^ accumulator) & 0x80) + statusRegister |= V; + else + statusRegister &= ~V; + + setFlagBorrow(tmp); + setStatusRegisterNZ(accumulator); + } +} + +static void CMP(void) +{ + tmp = accumulator - memRead(op); + cycles++; + setFlagBorrow(tmp); + setStatusRegisterNZ((unsigned char)tmp); +} + +static void CPX(void) +{ + tmp = xRegister - memRead(op); + cycles++; + setFlagBorrow(tmp); + setStatusRegisterNZ((unsigned char)tmp); +} + +static void CPY(void) +{ + tmp = yRegister - memRead(op); + cycles++; + setFlagBorrow(tmp); + setStatusRegisterNZ((unsigned char)tmp); +} + +static void AND(void) +{ + accumulator &= memRead(op); + cycles++; + setStatusRegisterNZ(accumulator); +} + +static void ORA(void) +{ + accumulator |= memRead(op); + cycles++; + setStatusRegisterNZ(accumulator); +} + +static void EOR(void) +{ + accumulator ^= memRead(op); + cycles++; + setStatusRegisterNZ(accumulator); +} + +static void ASL(void) +{ + btmp = memRead(op); + + if (btmp & 0x80) + statusRegister |= C; + else + statusRegister &= ~C; + + btmp <<= 1; + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 3; +} + +static void ASL_A(void) +{ + tmp = accumulator << 1; + accumulator = tmp & 0xFF; + setFlagCarry(tmp); + setStatusRegisterNZ(accumulator); +} + +static void LSR(void) +{ + btmp = memRead(op); + + if (btmp & 1) + statusRegister |= C; + else + statusRegister &= ~C; + + btmp >>= 1; + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 3; +} + +static void LSR_A(void) +{ + if (accumulator & 1) + statusRegister |= C; + else + statusRegister &= ~C; + + accumulator >>= 1; + setStatusRegisterNZ(accumulator); +} + +static void ROL(void) +{ + int newCarry; + + btmp = memRead(op); + newCarry = btmp & 0x80; + btmp = (btmp << 1) | (statusRegister & C ? 1 : 0); + + if (newCarry) + statusRegister |= C; + else + statusRegister &= ~C; + + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 3; +} + +static void ROL_A(void) +{ + tmp = (accumulator << 1) | (statusRegister & C ? 1 : 0); + accumulator = tmp & 0xFF; + setFlagCarry(tmp); + setStatusRegisterNZ(accumulator); +} + +static void ROR(void) +{ + int newCarry; + + btmp = memRead(op); + newCarry = btmp & 1; + btmp = (btmp >> 1) | (statusRegister & C ? 0x80 : 0); + + if (newCarry) + statusRegister |= C; + else + statusRegister &= ~C; + + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 3; +} + +static void ROR_A(void) +{ + tmp = accumulator | (statusRegister & C ? 0x100 : 0); + + if (accumulator & 1) + statusRegister |= C; + else + statusRegister &= ~C; + + accumulator = tmp >> 1; + setStatusRegisterNZ(accumulator); +} + +static void INC(void) +{ + btmp = memRead(op); + btmp++; + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 2; +} + +static void DEC(void) +{ + btmp = memRead(op); + btmp--; + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 2; +} + +static void INX(void) +{ + xRegister++; + setStatusRegisterNZ(xRegister); +} + +static void INY(void) +{ + yRegister++; + setStatusRegisterNZ(yRegister); +} + +static void DEX(void) +{ + xRegister--; + setStatusRegisterNZ(xRegister); +} + +static void DEY(void) +{ + yRegister--; + setStatusRegisterNZ(yRegister); +} + +static void BIT(void) +{ + btmp = memRead(op); + + if (btmp & 0x40) + statusRegister |= V; + else + statusRegister &= ~V; + + if (btmp & 0x80) + statusRegister |= N; + else + statusRegister &= ~N; + + if (!(btmp & accumulator)) + statusRegister |= Z; + else + statusRegister &= ~Z; + + cycles++; +} + +static void PHA(void) +{ + memWrite((unsigned short)(0x100 + stackPointer), accumulator); + stackPointer--; + cycles++; +} + +static void PHP(void) +{ + memWrite((unsigned short)(0x100 + stackPointer), statusRegister); + stackPointer--; + cycles++; +} + +static void PLA(void) +{ + stackPointer++; + accumulator = memRead((unsigned short)(stackPointer + 0x100)); + setStatusRegisterNZ(accumulator); + cycles += 2; +} + +static void PLP(void) +{ + stackPointer++; + statusRegister = memRead((unsigned short)(stackPointer + 0x100)); + cycles += 2; +} + +static void BRK(void) +{ + pushProgramCounter(); + PHP(); + statusRegister |= B; + programCounter = memReadAbsolute(0xFFFE); + cycles += 3; +} + +static void RTI(void) +{ + PLP(); + popProgramCounter(); + cycles++; +} + +static void JMP(void) +{ + programCounter = op; +} + +static void RTS(void) +{ + popProgramCounter(); + programCounter++; + cycles += 2; +} + +static void JSR(void) +{ + opL = memRead(programCounter++); + pushProgramCounter(); + programCounter = opL + (memRead(programCounter) << 8); + cycles += 3; +} + +static void branch(void) +{ + cycles++; + + if ((programCounter & 0xFF00) != (op & 0xFF00)) + cycles++; + + programCounter = op; +} + +static void BNE(void) +{ + if (!(statusRegister & Z)) + branch(); +} + +static void BEQ(void) +{ + if (statusRegister & Z) + branch(); +} + +static void BVC(void) +{ + if (!(statusRegister & V)) + branch(); +} + +static void BVS(void) +{ + if (statusRegister & V) + branch(); +} + +static void BCC(void) +{ + if (!(statusRegister & C)) + branch(); +} + +static void BCS(void) +{ + if (statusRegister & C) + branch(); +} + +static void BPL(void) +{ + if (!(statusRegister & N)) + branch(); +} + +static void BMI(void) +{ + if (statusRegister & N) + branch(); +} + +static void TAX(void) +{ + xRegister = accumulator; + setStatusRegisterNZ(accumulator); +} + +static void TXA(void) +{ + accumulator = xRegister; + setStatusRegisterNZ(accumulator); +} + +static void TAY(void) +{ + yRegister = accumulator; + setStatusRegisterNZ(accumulator); +} + +static void TYA(void) +{ + accumulator = yRegister; + setStatusRegisterNZ(accumulator); +} + +static void TXS(void) +{ + stackPointer = xRegister; +} + +static void TSX(void) +{ + xRegister = stackPointer; + setStatusRegisterNZ(xRegister); +} + +static void CLC(void) +{ + statusRegister &= ~C; +} + +static void SEC(void) +{ + statusRegister |= C; +} + +static void CLI(void) +{ + statusRegister &= ~I; +} + +static void SEI(void) +{ + statusRegister |= I; +} + +static void CLV(void) +{ + statusRegister &= ~V; +} + +static void CLD(void) +{ + statusRegister &= ~D; +} + +static void SED(void) +{ + statusRegister |= D; +} + +static void NOP(void) +{ +} + +static void Unoff(void) +{ +} + +static void Unoff1(void) +{ +} + +static void Unoff2(void) +{ + programCounter++; +} + +static void Unoff3(void) +{ + programCounter += 2; +} + +static void Hang(void) +{ + programCounter--; +} + +static void executeOpcode(void) +{ + unsigned char opcode = memRead(programCounter++); + + switch (opcode) + { + case 0x00: + Imm(); + BRK(); + break; + case 0x01: + IndZeroX(); + ORA(); + break; + case 0x02: + Hang(); + break; + case 0x03: + Unoff(); + break; + case 0x04: + Unoff2(); + break; + case 0x05: + Zero(); + ORA(); + break; + case 0x06: + Zero(); + ASL(); + break; + case 0x07: + Unoff(); + break; + case 0x08: + Imp(); + PHP(); + break; + case 0x09: + Imm(); + ORA(); + break; + case 0x0A: + Imp(); + ASL_A(); + break; + case 0x0B: + Imm(); + AND(); + break; + case 0x0C: + Unoff3(); + break; + case 0x0D: + Abs(); + ORA(); + break; + case 0x0E: + Abs(); + ASL(); + break; + case 0x0F: + Unoff(); + break; + case 0x10: + Rel(); + BPL(); + break; + case 0x11: + IndZeroY(); + ORA(); + break; + case 0x12: + Hang(); + break; + case 0x13: + Unoff(); + break; + case 0x14: + Unoff2(); + break; + case 0x15: + ZeroX(); + ORA(); + break; + case 0x16: + ZeroX(); + ASL(); + break; + case 0x17: + Unoff(); + break; + case 0x18: + Imp(); + CLC(); + break; + case 0x19: + AbsY(); + ORA(); + break; + case 0x1A: + Unoff1(); + break; + case 0x1B: + Unoff(); + break; + case 0x1C: + Unoff3(); + break; + case 0x1D: + AbsX(); + ORA(); + break; + case 0x1E: + WAbsX(); + ASL(); + break; + case 0x1F: + Unoff(); + break; + case 0x20: + JSR(); + break; + case 0x21: + IndZeroX(); + AND(); + break; + case 0x22: + Hang(); + break; + case 0x23: + Unoff(); + break; + case 0x24: + Zero(); + BIT(); + break; + case 0x25: + Zero(); + AND(); + break; + case 0x26: + Zero(); + ROL(); + break; + case 0x27: + Unoff(); + break; + case 0x28: + Imp(); + PLP(); + break; + case 0x29: + Imm(); + AND(); + break; + case 0x2A: + Imp(); + ROL_A(); + break; + case 0x2B: + Imm(); + AND(); + break; + case 0x2C: + Abs(); + BIT(); + break; + case 0x2D: + Abs(); + AND(); + break; + case 0x2E: + Abs(); + ROL(); + break; + case 0x2F: + Unoff(); + break; + case 0x30: + Rel(); + BMI(); + break; + case 0x31: + IndZeroY(); + AND(); + break; + case 0x32: + Hang(); + break; + case 0x33: + Unoff(); + break; + case 0x34: + Unoff2(); + break; + case 0x35: + ZeroX(); + AND(); + break; + case 0x36: + ZeroX(); + ROL(); + break; + case 0x37: + Unoff(); + break; + case 0x38: + Imp(); + SEC(); + break; + case 0x39: + AbsY(); + AND(); + break; + case 0x3A: + Unoff1(); + break; + case 0x3B: + Unoff(); + break; + case 0x3C: + Unoff3(); + break; + case 0x3D: + AbsX(); + AND(); + break; + case 0x3E: + WAbsX(); + ROL(); + break; + case 0x3F: + Unoff(); + break; + case 0x40: + Imp(); + RTI(); + break; + case 0x41: + IndZeroX(); + EOR(); + break; + case 0x42: + Hang(); + break; + case 0x43: + Unoff(); + break; + case 0x44: + Unoff2(); + break; + case 0x45: + Zero(); + EOR(); + break; + case 0x46: + Zero(); + LSR(); + break; + case 0x47: + Unoff(); + break; + case 0x48: + Imp(); + PHA(); + break; + case 0x49: + Imm(); + EOR(); + break; + case 0x4A: + Imp(); + LSR_A(); + break; + case 0x4B: + Unoff(); + break; + case 0x4C: + Abs(); + JMP(); + break; + case 0x4D: + Abs(); + EOR(); + break; + case 0x4E: + Abs(); + LSR(); + break; + case 0x4F: + Unoff(); + break; + case 0x50: + Rel(); + BVC(); + break; + case 0x51: + IndZeroY(); + EOR(); + break; + case 0x52: + Hang(); + break; + case 0x53: + Unoff(); + break; + case 0x54: + Unoff2(); + break; + case 0x55: + ZeroX(); + EOR(); + break; + case 0x56: + ZeroX(); + LSR(); + break; + case 0x57: + Unoff(); + break; + case 0x58: + Imp(); + CLI(); + break; + case 0x59: + AbsY(); + EOR(); + break; + case 0x5A: + Unoff1(); + break; + case 0x5B: + Unoff(); + break; + case 0x5C: + Unoff3(); + break; + case 0x5D: + AbsX(); + EOR(); + break; + case 0x5E: + WAbsX(); + LSR(); + break; + case 0x5F: + Unoff(); + break; + case 0x60: + Imp(); + RTS(); + break; + case 0x61: + IndZeroX(); + ADC(); + break; + case 0x62: + Hang(); + break; + case 0x63: + Unoff(); + break; + case 0x64: + Unoff2(); + break; + case 0x65: + Zero(); + ADC(); + break; + case 0x66: + Zero(); + ROR(); + break; + case 0x67: + Unoff(); + break; + case 0x68: + Imp(); + PLA(); + break; + case 0x69: + Imm(); + ADC(); + break; + case 0x6A: + Imp(); + ROR_A(); + break; + case 0x6B: + Unoff(); + break; + case 0x6C: + Ind(); + JMP(); + break; + case 0x6D: + Abs(); + ADC(); + break; + case 0x6E: + Abs(); + ROR(); + break; + case 0x6F: + Unoff(); + break; + case 0x70: + Rel(); + BVS(); + break; + case 0x71: + IndZeroY(); + ADC(); + break; + case 0x72: + Hang(); + break; + case 0x73: + Unoff(); + break; + case 0x74: + Unoff2(); + break; + case 0x75: + ZeroX(); + ADC(); + break; + case 0x76: + ZeroX(); + ROR(); + break; + case 0x77: + Unoff(); + break; + case 0x78: + Imp(); + SEI(); + break; + case 0x79: + AbsY(); + ADC(); + break; + case 0x7A: + Unoff1(); + break; + case 0x7B: + Unoff(); + break; + case 0x7C: + Unoff3(); + break; + case 0x7D: + AbsX(); + ADC(); + break; + case 0x7E: + WAbsX(); + ROR(); + break; + case 0x7F: + Unoff(); + break; + case 0x80: + Unoff2(); + break; + case 0x81: + IndZeroX(); + STA(); + break; + case 0x82: + Unoff2(); + break; + case 0x83: + Unoff(); + break; + case 0x84: + Zero(); + STY(); + break; + case 0x85: + Zero(); + STA(); + break; + case 0x86: + Zero(); + STX(); + break; + case 0x87: + Unoff(); + break; + case 0x88: + Imp(); + DEY(); + break; + case 0x89: + Unoff2(); + break; + case 0x8A: + Imp(); + TXA(); + break; + case 0x8B: + Unoff(); + break; + case 0x8C: + Abs(); + STY(); + break; + case 0x8D: + Abs(); + STA(); + break; + case 0x8E: + Abs(); + STX(); + break; + case 0x8F: + Unoff(); + break; + case 0x90: + Rel(); + BCC(); + break; + case 0x91: + WIndZeroY(); + STA(); + break; + case 0x92: + Hang(); + break; + case 0x93: + Unoff(); + break; + case 0x94: + ZeroX(); + STY(); + break; + case 0x95: + ZeroX(); + STA(); + break; + case 0x96: + ZeroY(); + STX(); + break; + case 0x97: + Unoff(); + break; + case 0x98: + Imp(); + TYA(); + break; + case 0x99: + WAbsY(); + STA(); + break; + case 0x9A: + Imp(); + TXS(); + break; + case 0x9B: + Unoff(); + break; + case 0x9C: + Unoff(); + break; + case 0x9D: + WAbsX(); + STA(); + break; + case 0x9E: + Unoff(); + break; + case 0x9F: + Unoff(); + break; + case 0xA0: + Imm(); + LDY(); + break; + case 0xA1: + IndZeroX(); + LDA(); + break; + case 0xA2: + Imm(); + LDX(); + break; + case 0xA3: + Unoff(); + break; + case 0xA4: + Zero(); + LDY(); + break; + case 0xA5: + Zero(); + LDA(); + break; + case 0xA6: + Zero(); + LDX(); + break; + case 0xA7: + Unoff(); + break; + case 0xA8: + Imp(); + TAY(); + break; + case 0xA9: + Imm(); + LDA(); + break; + case 0xAA: + Imp(); + TAX(); + break; + case 0xAB: + Unoff(); + break; + case 0xAC: + Abs(); + LDY(); + break; + case 0xAD: + Abs(); + LDA(); + break; + case 0xAE: + Abs(); + LDX(); + break; + case 0xAF: + Unoff(); + break; + case 0xB0: + Rel(); + BCS(); + break; + case 0xB1: + IndZeroY(); + LDA(); + break; + case 0xB2: + Hang(); + break; + case 0xB3: + Unoff(); + break; + case 0xB4: + ZeroX(); + LDY(); + break; + case 0xB5: + ZeroX(); + LDA(); + break; + case 0xB6: + ZeroY(); + LDX(); + break; + case 0xB7: + Unoff(); + break; + case 0xB8: + Imp(); + CLV(); + break; + case 0xB9: + AbsY(); + LDA(); + break; + case 0xBA: + Imp(); + TSX(); + break; + case 0xBB: + Unoff(); + break; + case 0xBC: + AbsX(); + LDY(); + break; + case 0xBD: + AbsX(); + LDA(); + break; + case 0xBE: + AbsY(); + LDX(); + break; + case 0xBF: + Unoff(); + break; + case 0xC0: + Imm(); + CPY(); + break; + case 0xC1: + IndZeroX(); + CMP(); + break; + case 0xC2: + Unoff2(); + break; + case 0xC3: + Unoff(); + break; + case 0xC4: + Zero(); + CPY(); + break; + case 0xC5: + Zero(); + CMP(); + break; + case 0xC6: + Zero(); + DEC(); + break; + case 0xC7: + Unoff(); + break; + case 0xC8: + Imp(); + INY(); + break; + case 0xC9: + Imm(); + CMP(); + break; + case 0xCA: + Imp(); + DEX(); + break; + case 0xCB: + Unoff(); + break; + case 0xCC: + Abs(); + CPY(); + break; + case 0xCD: + Abs(); + CMP(); + break; + case 0xCE: + Abs(); + DEC(); + break; + case 0xCF: + Unoff(); + break; + case 0xD0: + Rel(); + BNE(); + break; + case 0xD1: + IndZeroY(); + CMP(); + break; + case 0xD2: + Hang(); + break; + case 0xD3: + Unoff(); + break; + case 0xD4: + Unoff2(); + break; + case 0xD5: + ZeroX(); + CMP(); + break; + case 0xD6: + ZeroX(); + DEC(); + break; + case 0xD7: + Unoff(); + break; + case 0xD8: + Imp(); + CLD(); + break; + case 0xD9: + AbsY(); + CMP(); + break; + case 0xDA: + Unoff1(); + break; + case 0xDB: + Unoff(); + break; + case 0xDC: + Unoff3(); + break; + case 0xDD: + AbsX(); + CMP(); + break; + case 0xDE: + WAbsX(); + DEC(); + break; + case 0xDF: + Unoff(); + break; + case 0xE0: + Imm(); + CPX(); + break; + case 0xE1: + IndZeroX(); + SBC(); + break; + case 0xE2: + Unoff2(); + break; + case 0xE3: + Unoff(); + break; + case 0xE4: + Zero(); + CPX(); + break; + case 0xE5: + Zero(); + SBC(); + break; + case 0xE6: + Zero(); + INC(); + break; + case 0xE7: + Unoff(); + break; + case 0xE8: + Imp(); + INX(); + break; + case 0xE9: + Imm(); + SBC(); + break; + case 0xEA: + Imp(); + NOP(); + break; + case 0xEB: + Imm(); + SBC(); + break; + case 0xEC: + Abs(); + CPX(); + break; + case 0xED: + Abs(); + SBC(); + break; + case 0xEE: + Abs(); + INC(); + break; + case 0xEF: + Unoff(); + break; + case 0xF0: + Rel(); + BEQ(); + break; + case 0xF1: + IndZeroY(); + SBC(); + break; + case 0xF2: + Hang(); + break; + case 0xF3: + Unoff(); + break; + case 0xF4: + Unoff2(); + break; + case 0xF5: + ZeroX(); + SBC(); + break; + case 0xF6: + ZeroX(); + INC(); + break; + case 0xF7: + Unoff(); + break; + case 0xF8: + Imp(); + SED(); + break; + case 0xF9: + AbsY(); + SBC(); + break; + case 0xFA: + Unoff1(); + break; + case 0xFB: + Unoff(); + break; + case 0xFC: + Unoff3(); + break; + case 0xFD: + AbsX(); + SBC(); + break; + case 0xFE: + WAbsX(); + INC(); + break; + case 0xFF: + Unoff(); + break; + } +} + +static int runM6502(void *data) +{ + while (running) + { + synchronize(); + + cycles = 0; + + while (running && cycles < cyclesBeforeSynchro) + { + if (!(statusRegister & I) && IRQ) + handleIRQ(); + if (NMI) + handleNMI(); + + executeOpcode(); + } + } + + return 0; +} + +void startM6502(void) +{ + running = 1; + lastTime = SDL_GetTicks(); + thread = SDL_CreateThread(runM6502, NULL); +} + +void stopM6502(void) +{ + running = 0; + SDL_WaitThread(thread, NULL); +} + +void resetM6502(void) +{ + statusRegister |= I; + stackPointer = 0xFF; + programCounter = memReadAbsolute(0xFFFC); +} + +void setSpeed(int freq, int synchroMillis) +{ + cyclesBeforeSynchro = synchroMillis * freq; + _synchroMillis = synchroMillis; +} + +void setIRQ(int state) +{ + IRQ = state; +} + +void setNMI(void) +{ + NMI = 1; +} + +int *dumpState(void) +{ + int *state = (int *)malloc(sizeof(int) * 6); + + state[0] = programCounter; + state[1] = statusRegister; + state[2] = accumulator; + state[3] = xRegister; + state[4] = yRegister; + state[5] = stackPointer; + + return state; +} + +void loadState(int *state) +{ + programCounter = state[0]; + statusRegister = state[1]; + accumulator = state[2]; + xRegister = state[3]; + yRegister = state[4]; + stackPointer = state[5]; +} diff --git a/src/m6502.h b/src/m6502.h new file mode 100644 index 0000000..703798c --- /dev/null +++ b/src/m6502.h @@ -0,0 +1,31 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#ifndef __M6502_H__ +#define __M6502_H__ + +void startM6502(void); +void stopM6502(void); +void resetM6502(void); +void setSpeed(int freq, int synchroMillis); +void setIRQ(int state); +void setNMI(void); +int *dumpState(void); +void loadState(int *state); + +#endif diff --git a/src/main.c b/src/main.c new file mode 100644 index 0000000..88c5297 --- /dev/null +++ b/src/main.c @@ -0,0 +1,131 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#include "SDL.h" +#include "configuration.h" +#include "keyboard.h" +#include "m6502.h" +#include "memory.h" +#include "screen.h" +#include "config.h" + +#ifdef _WIN32 +#define strcasecmp _stricmp +#endif + +int main(int argc, char *argv[]) +{ + int i, temp; + char *romdir = getenv("POM1ROMDIR"); + + atexit(freeRomDirectory); + + if (romdir) + setRomDirectory(romdir); + else + setRomDirectory("roms"); + + loadConfiguration(); + + atexit(saveConfiguration); + + if (argc > 1) + { + for (i = 1; i < argc; i++) + { + if (!strcasecmp("-romdir", argv[i]) && i + 1 < argc) + setRomDirectory(argv[i + 1]); + else if (!strcasecmp("-pixelsize", argv[i]) && i + 1 < argc) + { + temp = atoi(argv[i + 1]); + + if (temp == 1 || temp == 2) + { + if (temp == 1) + setScanlines(0); + + setPixelSize(temp); + } + } + 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]); + + if (temp >= 1 && temp <= 120) + setTerminalSpeed(temp); + } + else if (!strcasecmp("-ram8k", argv[i])) + setRam8k(1); + else if (!strcasecmp("-writeinrom", argv[i])) + setWriteInRom(1); + else if (!strcasecmp("-fullscreen", argv[i])) + setFullscreen(1); + else if (!strcasecmp("-blinkcursor", argv[i])) + setBlinkCursor(1); + else if (!strcasecmp("-blockcursor", argv[i])) + setBlockCursor(1); + } + } + + if (SDL_Init(SDL_INIT_VIDEO) < 0) + { + fprintf(stderr, "stderr: Could not initialize SDL\n"); + return 1; + } + + atexit(SDL_Quit); + + SDL_WM_SetCaption(PACKAGE_NAME, NULL); + + if (!SDL_SetVideoMode(280 * getPixelSize(), 192 * getPixelSize(), 8, SDL_HWSURFACE | (getFullscreen() ? SDL_FULLSCREEN : 0))) + { + fprintf(stderr, "stderr: Could not set video mode to %dx%dx8\n", 280 * getPixelSize(), 192 * getPixelSize()); + return 1; + } + + initScreen(); + + SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL); + + SDL_EnableUNICODE(1); + + SDL_ShowCursor(!getFullscreen()); + + if (!loadCharMap()) + { + fprintf(stderr, "stderr: Could not load character map\n"); + return 1; + } + + resetScreen(); + resetMemory(); + setSpeed(1000, 50); + resetM6502(); + startM6502(); + + atexit(stopM6502); + atexit(closeInputFile); + + while (handleInput()) + updateScreen(); + + return 0; +} diff --git a/src/memory.c b/src/memory.c new file mode 100644 index 0000000..dce1faa --- /dev/null +++ b/src/memory.c @@ -0,0 +1,174 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#include +#include +#include +#include "configuration.h" +#include "pia6820.h" + +static unsigned char mem[65536]; +static int ram8k = 0, writeInRom = 1; + +static int loadMonitor(void) +{ + const char *romdir = getRomDirectory(); + char *filename; + FILE *fp; + + filename = (char *)malloc(strlen(romdir) + 13); + sprintf(filename, "%s/monitor.rom", romdir); + + fp = fopen(filename, "rb"); + + free(filename); + + if (fp) + { + fread(&mem[0xFF00], 1, 256, fp); + fclose(fp); + } + else + return 0; + + return 1; +} + +static int loadBasic(void) +{ + const char *romdir = getRomDirectory(); + char *filename; + FILE *fp; + + filename = (char *)malloc(strlen(romdir) + 11); + sprintf(filename, "%s/basic.rom", romdir); + + fp = fopen(filename, "rb"); + + free(filename); + + if (fp) + { + fread(&mem[0xE000], 1, 4096, fp); + fclose(fp); + } + else + return 0; + + return 1; +} + + +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); + } +} + +void setRam8k(int b) +{ + ram8k = b; +} + +int getRam8k() +{ + return ram8k; +} + +void setWriteInRom(int b) +{ + writeInRom = b; +} + +int getWriteInRom(void) +{ + return writeInRom; +} + +unsigned char memRead(unsigned short address) +{ + if (address == 0xD013) + return readDspCr(); + if (address == 0xD012) + return readDsp(); + if (address == 0xD011) + return readKbdCr(); + if (address == 0xD010) + return readKbd(); + + return mem[address]; +} + +void memWrite(unsigned short address, unsigned char value) +{ + if (address == 0xD013) + { + writeDspCr(value); + return; + } + if (address == 0xD012) + { + writeDsp((unsigned char)(value | 0x80)); + return; + } + if (address == 0xD011) + { + writeKbdCr(value); + return; + } + if (address == 0xD010) + { + writeKbd(value); + return; + } + + if (address >= 0xFF00 && !writeInRom) + return; + if (ram8k && address >= 0x2000 && address < 0xFF00) + return; + + mem[address] = value; +} + +unsigned char *dumpMemory(unsigned short start, unsigned short end) +{ + unsigned char *fbrut = (unsigned char *)malloc(end - start + 1); + + if (!fbrut) + fprintf(stderr, "stderr: Could not allocate memory block\n"); + else + memcpy(fbrut, &mem[start], end - start + 1); + + return fbrut; +} + +void setMemory(const unsigned char *data, unsigned short start, unsigned int size) +{ + memcpy(&mem[start], data, size); +} diff --git a/src/memory.h b/src/memory.h new file mode 100644 index 0000000..50aed7f --- /dev/null +++ b/src/memory.h @@ -0,0 +1,32 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#ifndef __MEMORY_H__ +#define __MEMORY_H__ + +void resetMemory(void); +void setRam8k(int b); +int getRam8k(void); +void setWriteInRom(int b); +int getWriteInRom(void); +unsigned char memRead(unsigned short address); +void memWrite(unsigned short address, unsigned char value); +unsigned char *dumpMemory(unsigned short start, unsigned short end); +void setMemory(const unsigned char *data, unsigned short start, unsigned int size); + +#endif diff --git a/src/options.c b/src/options.c new file mode 100644 index 0000000..9227124 --- /dev/null +++ b/src/options.c @@ -0,0 +1,687 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#include "SDL.h" +#include "memory.h" +#include "keyboard.h" +#include "screen.h" +#include "config.h" + +#define TYPE_STRING 1 +#define TYPE_DECIMAL 2 +#define TYPE_HEXADECIMAL 3 +#define TYPE_CHOICE 4 + +#define isHexDigit(c) ((c >= '0' && c <= '9') || ((c & 0x5F) >= 'A' && (c & 0x5F) <= 'F')) + +static int step, type, max, choice; +static unsigned int start; +static char filename[1024], buffer[1024]; +static FILE *fp; + +static void drawString(const char *str, int x, int y) +{ + char c; + const char *p = str; + int X = x; + int characterWidth = 7 * getPixelSize(), characterHeight = 8 * getPixelSize(); + + while (c = *p++) + { + if (c == '\n') + { + X = x; + y += characterHeight; + } + else + { + drawCharacter(X, y, 0, 0, 0, c); + X += characterWidth; + } + } +} + +static void inputLoop(const char *str, int (*func)(void)) +{ + SDL_Event event; + SDL_Rect rect; + SDL_Surface *screen = SDL_GetVideoSurface(); + int screenWidth = screen->w, screenHeight = screen->h; + int i, c = 0, x = 0; + char tmp; + int pixelSize = getPixelSize(); + int characterWidth = 7 * pixelSize, characterHeight = 8 * pixelSize; + + rect.x = 0; + rect.y = screenHeight - (2 * characterHeight + pixelSize); + rect.w = screenWidth; + rect.h = 2 * characterHeight + pixelSize; + + SDL_FillRect(screen, &rect, 255); + + drawString(str, 0, screenHeight - 16 * pixelSize); + + if (type != TYPE_CHOICE) + drawCharacter(0, screenHeight - characterHeight, 0, 0, 0, 0x01); + + SDL_UpdateRect(screen, rect.x, rect.y, rect.w, rect.h); + + step = 1; + + while (1) + { + while (SDL_PollEvent(&event)) + { + if (event.type == SDL_QUIT || (event.type == SDL_KEYDOWN && event.key.keysym.mod & KMOD_CTRL && event.key.keysym.sym == SDLK_q)) + exit(0); + + if (event.type == SDL_KEYDOWN) + { + if (event.key.keysym.sym == SDLK_ESCAPE) + { + redrawScreen(); + return; + } + else if (event.key.keysym.sym == SDLK_SPACE && type == TYPE_STRING) + { + if (c < max) + buffer[c++] = ' '; + else + continue; + + if (c - 1 < 39) + { + rect.x = x; + rect.y = screenHeight - characterHeight; + rect.w = characterWidth; + rect.h = characterHeight; + + SDL_FillRect(screen, &rect, 255); + + x += characterWidth; + + drawCharacter(x, rect.y, 0, 0, 0, 0x01); + + SDL_UpdateRect(screen, rect.x, rect.y, 2 * characterWidth, characterHeight); + } + else + { + rect.x = 0; + rect.y = screenHeight - characterHeight; + rect.w = screenWidth - characterWidth; + rect.h = characterHeight; + + SDL_FillRect(screen, &rect, 255); + + rect.w = characterWidth; + + for (i = 0; i < 39; i++) + { + rect.x = characterWidth * i; + + if (buffer[(c - 39) + i] == ' ') + SDL_FillRect(screen, &rect, 255); + else + drawCharacter(rect.x, rect.y, 0, 0, 0, buffer[(c - 39) + i]); + } + + SDL_UpdateRect(screen, 0, rect.y, screenWidth - characterWidth, characterHeight); + } + } + else if (event.key.keysym.sym == SDLK_BACKSPACE && type != TYPE_CHOICE) + { + if (c > 0) + buffer[--c] = '\0'; + else + continue; + + if (x > 0 && c < 39) + { + x -= characterWidth; + + rect.x = x; + rect.y = screenHeight - characterHeight; + rect.w = 2 * characterWidth; + rect.h = characterHeight; + + SDL_FillRect(screen, &rect, 255); + + drawCharacter(x, rect.y, 0, 0, 0, 0x01); + + SDL_UpdateRect(screen, rect.x, rect.y, rect.w, characterHeight); + } + else + { + rect.x = 0; + rect.y = screenHeight - characterHeight; + rect.w = screenWidth - characterWidth; + rect.h = characterHeight; + + SDL_FillRect(screen, &rect, 255); + + rect.w = characterWidth; + + for (i = 0; i < 39; i++) + { + rect.x = characterWidth * i; + + if (buffer[(c - 39) + i] == ' ') + SDL_FillRect(screen, &rect, 255); + else + drawCharacter(rect.x, rect.y, 0, 0, 0, buffer[(c - 39) + i]); + } + + SDL_UpdateRect(screen, 0, rect.y, screenWidth - characterWidth, characterHeight); + } + } + else if ((event.key.keysym.sym == SDLK_RETURN && c) || (type == TYPE_CHOICE && (event.key.keysym.sym == SDLK_1 || event.key.keysym.sym == SDLK_2))) + { + if (type == TYPE_CHOICE) + choice = event.key.keysym.sym & 0x03; + + rect.x = 0; + rect.y = screenHeight - (2 * characterHeight + pixelSize); + rect.w = screenWidth; + rect.h = 2 * characterHeight + pixelSize; + + SDL_FillRect(screen, &rect, 255); + + buffer[c] = '\0'; + + if (!(*func)()) + { + redrawScreen(); + return; + } + + SDL_UpdateRect(screen, 0, rect.y, screenWidth, rect.h); + + c = x = 0; + + step++; + } + else if (!(event.key.keysym.unicode & 0xFF80) && event.key.keysym.unicode) + { + tmp = event.key.keysym.unicode & 0x7F; + + if (type == TYPE_HEXADECIMAL && tmp >= 0x61 && tmp <= 0x66) + tmp &= 0x5F; + + if (c < max && ((type == TYPE_STRING && tmp >= 0x21 && tmp <= 0x7E) || (type == TYPE_DECIMAL && tmp >= 0x30 && tmp <= 0x39) || (type == TYPE_HEXADECIMAL && ((tmp >= 0x30 && tmp <= 0x39) || (tmp >= 0x41 && tmp <= 0x46))))) + buffer[c++] = tmp; + else + continue; + + if (c - 1 < 39) + { + rect.x = x; + rect.y = screenHeight - characterHeight; + rect.w = characterWidth; + rect.h = characterHeight; + + SDL_FillRect(screen, &rect, 255); + + drawCharacter(x, rect.y, 0, 0, 0, tmp); + + x += characterWidth; + + drawCharacter(x, rect.y, 0, 0, 0, 0x01); + + SDL_UpdateRect(screen, rect.x, rect.y, 2 * characterWidth, characterHeight); + } + else + { + rect.x = 0; + rect.y = screenHeight - characterHeight; + rect.w = screenWidth - characterWidth; + rect.h = characterHeight; + + SDL_FillRect(screen, &rect, 255); + + rect.w = characterWidth; + + for (i = 0; i < 39; i++) + { + rect.x = 7 * pixelSize * i; + + if (buffer[(c - 39) + i] == ' ') + SDL_FillRect(screen, &rect, 255); + else + drawCharacter(rect.x, rect.y, 0, 0, 0, buffer[(c - 39) + i]); + } + + SDL_UpdateRect(screen, 0, rect.y, screenWidth - characterWidth, characterHeight); + } + } + } + } + } +} + +static int loadMemoryFunc(void) +{ + int i, length, size; + unsigned int address, value; + unsigned char *fbrut; + + if (step == 1) + { + type = TYPE_CHOICE; + + strcpy(filename, buffer); + + drawString("Choose file format:\nPress 1 for ASCII or 2 for Binary", 0, 192 * getPixelSize() - 16 * getPixelSize()); + } + else if (step == 2) + { + if (choice == 1) + { + choice = 0; + + drawString("Do you want to simulate keyboard input?:\nPress 1 for yes or 2 for no", 0, 192 * getPixelSize() - 16 * getPixelSize()); + } + else + { + type = TYPE_HEXADECIMAL; + max = 4; + + drawString("Enter starting address:", 0, 192 * getPixelSize() - 16 * getPixelSize()); + + return 1; + } + } + else if (step == 3) + { + if (choice == 1 || choice == 2) + { + fp = fopen(filename, "r"); + + if (!fp) + { + fprintf(stderr, "stderr: Could not open \"%s\" for read\n", filename); + return 0; + } + + if (choice == 1) + { + if (isInputFileOpen()) + { + drawString("Do you want to abort the current read?:\nPress 1 for yes or 2 for no", 0, 192 * getPixelSize() - 16 * getPixelSize()); + return 1; + } + + setInputFile(fp, filename); + + return 0; + } + + while (!feof(fp)) + { + if (!fgets(buffer, 1024, fp)) + continue; + + if (buffer[0] == '/') + continue; + + if (buffer[0] != ':') + { + if (isHexDigit(buffer[0])) + { + if (buffer[1] == ':' || buffer[2] == '\0') + i = 2; + else if (isHexDigit(buffer[1])) + { + if (buffer[2] == ':' || buffer[3] == '\0') + i = 3; + else if (isHexDigit(buffer[2])) + { + if (buffer[3] == ':' || buffer[4] == '\0') + i = 4; + else if (isHexDigit(buffer[3])) + { + if (buffer[4] == ':' || buffer[5] == '\0') + i = 5; + else + continue; + } + else + continue; + } + else + continue; + } + else + continue; + } + else + continue; + + sscanf(buffer, "%4X", &address); + + if (buffer[i] == ' ') + i++; + else if (buffer[i] == '\0') + continue; + } + else if (buffer[1] == ' ') + i = 2; + else + i = 1; + + length = strlen(buffer); + + for (; i < length; i += 3) + { + sscanf(&buffer[i], "%2X", &value); + memWrite(address++, value); + } + } + + printf("stdout: Successfully loaded \"%s\"\n", filename); + } + else + { + sscanf(buffer, "%4X", &start); + + fp = fopen(filename, "rb"); + + if (!fp) + { + fprintf(stderr, "stderr: Could not open \"%s\" for write\n", filename); + return 0; + } + + fseek(fp, 0, SEEK_END); + size = ftell(fp); + fseek(fp, 0, SEEK_SET); + + if (size > 65536 || start + size - 1 > 65535) + fprintf(stderr, "stderr: File size too large\n"); + else + { + fbrut = (unsigned char *)malloc(size); + + if (!fbrut) + fprintf(stderr, "stderr: Could not allocate memory block\n"); + else + { + fread(fbrut, 1, size, fp); + setMemory(fbrut, start, size); + printf("stdout: Successfully loaded \"%s\"\n", filename); + } + } + } + + fclose(fp); + + return 0; + } + else if (step == 4) + { + if (choice == 1) + { + closeInputFile(); + printf("stdout: Canceled loading \"%s\"\n", getInputFileName()); + setInputFile(fp, filename); + } + else + fclose(fp); + + return 0; + } + + return 1; +} + +void loadMemory(void) +{ + type = TYPE_STRING; + max = 1024; + + inputLoop("Enter file to load:", &loadMemoryFunc); +} + +static int saveMemoryFunc(void) +{ + int i, j, k, length; + unsigned int end, temp; + unsigned char *fbrut; + char *strFile; + + if (step == 1) + { + type = TYPE_CHOICE; + + strcpy(filename, buffer); + + drawString("Choose file format:\nPress 1 for ASCII or 2 for Binary", 0, 192 * getPixelSize() - 16 * getPixelSize()); + } + else if (step == 2) + { + type = TYPE_HEXADECIMAL; + max = 4; + + drawString("Enter starting address:", 0, 192 * getPixelSize() - 16 * getPixelSize()); + } + else if (step == 3) + { + sscanf(buffer, "%4X", &start); + + drawString("Enter ending address:", 0, 192 * getPixelSize() - 16 * getPixelSize()); + } + else if (step == 4) + { + sscanf(buffer, "%4X", &end); + + if (start > end) + { + temp = start; + start = end; + end = temp; + } + + if (choice == 1) + { + fp = fopen(filename, "w"); + + if (!fp) + { + fprintf(stderr, "stderr: Could not open \"%s\" for write\n", filename); + return 0; + } + + fbrut = dumpMemory(start, end); + + if (fbrut) + { + strcpy(buffer, "// Pom1 Save - "); + + strFile = strrchr(filename, '/'); + + if (!strFile) + { + strFile = strrchr(filename, '\\'); + + if (!strFile) + strFile = filename; + else + strFile++; + } + else + strFile++; + + strcat(buffer, strFile); + + length = end - start + 1; + + for (i = 0, j = start; i < length; i++, k += 3) + { + if (i % 8 == 0) + { + fputs(buffer, fp); + sprintf(buffer, "\n%04X: ", j); + j += 8; + k = 7; + } + + sprintf(&buffer[k], "%02X ", fbrut[i]); + } + + fputs(buffer, fp); + + printf("stdout: Successfully saved \"%s\"\n", filename); + } + } + else + { + fp = fopen(filename, "wb"); + + if (!fp) + { + fprintf(stderr, "stderr: Could not open \"%s\" for write\n", filename); + return 0; + } + + fbrut = dumpMemory(start, end); + + if (fbrut) { + fwrite(fbrut, 1, end - start + 1, fp); + printf("stdout: Successfully saved \"%s\"\n", filename); + } + } + + free(fbrut); + + fclose(fp); + + return 0; + } + + return 1; +} + +void saveMemory(void) +{ + type = TYPE_STRING; + max = 1024; + + inputLoop("Enter file to save:", &saveMemoryFunc); +} + +static int changePixelSizeFunc(void) +{ + setPixelSize(choice); + printf("stdout: pixelSize=%d\n", getPixelSize()); + + if (choice == 1) + setScanlines(0); + + SDL_SetVideoMode(280 * getPixelSize(), 192 * getPixelSize(), 8, SDL_HWSURFACE | (getFullscreen() ? SDL_FULLSCREEN : 0)); + + return 0; +} + +void changePixelSize(void) +{ + type = TYPE_CHOICE; + + inputLoop("Choose pixel size:\nPress 1 for 1x or 2 for 2x", &changePixelSizeFunc); +} + +static int changeTerminalSpeedFunc(void) +{ + int terminalSpeed = atoi(buffer); + + if (terminalSpeed < 1 || terminalSpeed > 120) + fprintf(stderr, "stderr: Terminal speed out of range\n"); + else + { + setTerminalSpeed(terminalSpeed); + printf("stdout: terminalSpeed=%d\n", getTerminalSpeed()); + } + + return 0; +} + +void changeTerminalSpeed(void) +{ + type = TYPE_DECIMAL; + max = 3; + + inputLoop("Enter terminal speed (Range: 1 - 120):", &changeTerminalSpeedFunc); +} + +static int setIrqBrkVectorFunc(void) +{ + unsigned int brkVector; + + sscanf(buffer, "%4X", &brkVector); + memWrite(0xFFFE, (unsigned char)brkVector); + memWrite(0xFFFF, (unsigned char)(brkVector >> 8)); + printf("stdout: brkVector=%s\n", buffer); + + return 0; +} + +void setIrqBrkVector(void) +{ + type = TYPE_HEXADECIMAL; + max = 4; + + inputLoop("Enter IRQ/BRK vector:", &setIrqBrkVectorFunc); +} + +void showAbout(void) +{ + SDL_Event event; + SDL_Rect rect; + SDL_Surface *screen = SDL_GetVideoSurface(); + int screenWidth = screen->w, screenHeight = screen->h; + int pixelSize = getPixelSize(); + int characterWidth = 7 * pixelSize, characterHeight = 8 * pixelSize; + + rect.x = (screenWidth - (36 * characterWidth)) / 2; + rect.y = (screenHeight - (10 * characterHeight)) / 2; + rect.w = 36 * characterWidth; + rect.h = 10 * characterHeight; + + SDL_FillRect(screen, &rect, 255); + + drawString(PACKAGE_NAME, (screenWidth - strlen(PACKAGE_NAME) * characterWidth) / 2, rect.y + characterHeight); + drawString(PACKAGE_VERSION, (screenWidth - strlen(PACKAGE_VERSION) * characterWidth) / 2, rect.y + 3 * characterHeight); + drawString("Copyright (C) 2000 Verhille Arnaud", (screenWidth - 34 * characterWidth) / 2, rect.y + 5 * characterHeight); + drawString("Copyright (C) 2012 John D. Corrado", (screenWidth - 34 * characterWidth) / 2, rect.y + 6 * characterHeight); + drawString("Press Esc to continue", (screenWidth - 21 * characterWidth) / 2, rect.y + 8 * characterHeight); + + SDL_UpdateRect(screen, rect.x, rect.y, rect.w, rect.h); + + while (1) + { + while (SDL_PollEvent(&event)) + { + if (event.type == SDL_QUIT || (event.type == SDL_KEYDOWN && event.key.keysym.mod & KMOD_CTRL && event.key.keysym.sym == SDLK_q)) + exit(0); + + if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) + { + redrawScreen(); + return; + } + } + } +} diff --git a/src/options.h b/src/options.h new file mode 100644 index 0000000..205feeb --- /dev/null +++ b/src/options.h @@ -0,0 +1,29 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#ifndef __OPTIONS_H__ +#define __OPTIONS_H__ + +void loadMemory(void); +void saveMemory(void); +void changePixelSize(void); +void changeTerminalSpeed(void); +void setIrqBrkVector(void); +void showAbout(void); + +#endif diff --git a/src/pia6820.c b/src/pia6820.c new file mode 100644 index 0000000..5f717d8 --- /dev/null +++ b/src/pia6820.c @@ -0,0 +1,72 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +static unsigned char _dspCr = 0, _dsp = 0, _kbdCr = 0, _kbd = 0x80; + +void resetPia6820(void) +{ + _kbdCr = _dspCr = _dsp = 0; + _kbd = 0x80; +} + +void writeDspCr(unsigned char dspCr) +{ + _dspCr = dspCr; +} + +void writeDsp(unsigned char dsp) +{ + if (!(_dspCr & 0x04)) + return; + + _dsp = dsp; +} + +void writeKbdCr(unsigned char kbdCr) +{ + if (!_kbdCr) + kbdCr = 0x27; + + _kbdCr = kbdCr; +} + +void writeKbd(unsigned char kbd) +{ + _kbd = kbd; +} + +unsigned char readDspCr(void) +{ + return _dspCr; +} + +unsigned char readDsp(void) +{ + return _dsp; +} + +unsigned char readKbdCr(void) +{ + return _kbdCr; +} + +unsigned char readKbd(void) +{ + _kbdCr = 0x27; + return _kbd; +} diff --git a/src/pia6820.h b/src/pia6820.h new file mode 100644 index 0000000..9db8e84 --- /dev/null +++ b/src/pia6820.h @@ -0,0 +1,32 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#ifndef __PIA6820_H__ +#define __PIA6820_H__ + +void resetPia6820(void); +void writeDspCr(unsigned char dspCr); +void writeDsp(unsigned char dsp); +void writeKbdCr(unsigned char kbdCr); +void writeKbd(unsigned char kbd); +unsigned char readDspCr(void); +unsigned char readDsp(void); +unsigned char readKbdCr(void); +unsigned char readKbd(void); + +#endif diff --git a/src/pom1.desktop.in b/src/pom1.desktop.in new file mode 100644 index 0000000..8568d7a --- /dev/null +++ b/src/pom1.desktop.in @@ -0,0 +1,7 @@ +[Desktop Entry] +Name=@PACKAGE_NAME@ +Exec=pom1 +Icon=pom1 +Type=Application +Comment=@PACKAGE_SHORTDESC@ +Categories=Emulator; diff --git a/src/pom1.in b/src/pom1.in new file mode 100644 index 0000000..4b1059f --- /dev/null +++ b/src/pom1.in @@ -0,0 +1,5 @@ +#!/bin/sh + +export POM1ROMDIR="@prefix@/share/@PACKAGE@/roms" + +pom1-@PACKAGE_VERSION@ $@ diff --git a/src/pom1.png b/src/pom1.png new file mode 100644 index 0000000000000000000000000000000000000000..35d8eea437d67b26f55825e54af7f8822c3c9bae GIT binary patch literal 264 zcmeAS@N?(olHy`uVBq!ia0vp^4j|0I1SD0tpLGH$#^NA%Cx&(BWL^R}oCO|{#S9GG z!XV7ZFl&wkP>{XE)7O>#4wDosztFs8w#+~w$r9Iy66gHf+|;}h2Ir#G#FEq$h4Rdj z3MKKCP*TUrGdc^oAGA7U1645u z1nigV+xV&bS6%RA`SWMCZ432Jknet8Blq#qp2vlm6K@^ZFFd3CrIF>A5WfF@3YVkz zZHp40_2e+v7sS{l(ANZ36WY&Tu%nvsRsjtnq+y&x#y85}Sb4q9e03Bsn AU;qFB literal 0 HcmV?d00001 diff --git a/src/roms/.gitignore b/src/roms/.gitignore new file mode 100644 index 0000000..282522d --- /dev/null +++ b/src/roms/.gitignore @@ -0,0 +1,2 @@ +Makefile +Makefile.in diff --git a/src/roms/Makefile.am b/src/roms/Makefile.am new file mode 100644 index 0000000..121f2c0 --- /dev/null +++ b/src/roms/Makefile.am @@ -0,0 +1,9 @@ +ROMFILES = \ + basic.rom \ + charmap.rom \ + monitor.rom + +romdir = $(prefix)/share/@PACKAGE@/roms +rom_DATA = $(ROMFILES) + +EXTRA_DIST = $(ROMFILES) diff --git a/src/roms/basic.rom b/src/roms/basic.rom new file mode 100644 index 0000000000000000000000000000000000000000..cdd0fb5ac4f518b8504ddcee731607e9c1d4691e GIT binary patch literal 4096 zcmY*64R90JnY)&;vBHl?o5X2;*ajEuv^UXQA<%2);O<%wX2Hr3AUUSjy-8imckOX> z8c^vBb`w2UXUvT}wK_H_$zt>zt>d4Skx1O(2nNe&WxTui2e53XvaQvwfk?6)%#Xo) z-0hLjgojLQsvJLyq_yL0dNIP z@|UY_0QCpd%kg@YfVLT4>N$nVkGmc;Tk_48DV&f^)T(&3!Sh?xH{#9KJ18NL@{*<- zbl;@SB{qIhB?+&4vU{W{yDcC#y91)-LHq)r9Ve_a&5kKjo+?OKP1L zQzWy9m4C-cXN|L8m#@K43)xYuRJ8d+PBc;~*}9`jFF%Q6Hg9YG!hBKhOZFv z%KFS5M{TU(3gNcg)tH-XrR?Ph%B-?kbx!EG&tPXPL47b$=e&9IX6SV!hJJ-4O{30@ zhjtAe;-8w^7%~3ps z^Z}LIgA{821Qt;YOK1eFz?F2VShD0ra}?@;3INu^P(Mp$!n)v+v$oz7{*+lIyr0Qw zAhIGBGkc8co@7b4b&fK{Z{7qM3CHDY+@D~Up$5`a-{jU|?);+YTn`HFS(Y`;;k#f+ zoT2DO{RGIG&jTBXzz>#tS#W|w6JPVDViWg-BK4YTa)7Y#)yrGW(!=|by@w5^V 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0000000000000000000000000000000000000000..7280907226f38c9243aa42bcba245bf5824b764e GIT binary patch literal 256 zcmcZ+v7o+3=)%h7y@D5dg)f}E|3UcV><`Q*1o&6pQF#AMm0|CJ1@xLUPO>||g%+56$j$#oOHeE4v3*N4|9FMY6X(`eId(E>_& zZaB#`fi1J+WTtKjhg-cCCP4m=+A15w6IHL7ox{7vyz*3DywP$J 0) + SDL_Delay(sleepMillis); + + lastTime = SDL_GetTicks(); +} + +static void newLine(void) +{ + memcpy(&screenTbl, &screenTbl[40], 920); + memset(&screenTbl[920], 0, 40); +} + +static void outputDsp(unsigned char dsp) +{ + unsigned char tmp; + + dsp &= 0x7F; + + tmp = dsp; + + if (dsp >= 0x60 && dsp <= 0x7F) + tmp &= 0x5F; + + switch (tmp) + { + case 0x0D: + indexX = 0; + indexY++; + break; + default: + if (tmp >= 0x20 && tmp <= 0x5F) + { + screenTbl[indexY * 40 + indexX] = tmp; + indexX++; + } + break; + } + + if (indexX == 40) + { + indexX = 0; + indexY++; + } + if (indexY == 24) + { + newLine(); + indexY--; + } + + writeDsp(dsp); +} + +static void drawCharac(int xPosition, int yPosition, unsigned char r, unsigned char g, unsigned char b, unsigned char characNumber) +{ + SDL_Rect rect; + int k, l; + + for (k = 0; k < 8; k++) + { + for (l = 1; l < 8; l++) + { + if (charac[characNumber * 8 + k] & (0x01 << l)) + { + rect.x = xPosition + pixelSize * (l - 1); + rect.y = yPosition + pixelSize * k; + rect.w = pixelSize; + rect.h = pixelSize - (_scanlines ? 1 : 0); + + SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, r, g, b)); + } + } + } +} + +void setFullscreen(int fullscreen) +{ + _fullscreen = fullscreen; +} + +int getFullscreen() +{ + return _fullscreen; +} + +void setBlinkCursor(int blinkCursor) +{ + _blinkCursor = blinkCursor; +} + +int getBlinkCursor(void) +{ + return _blinkCursor; +} + +void setBlockCursor(int blockCursor) +{ + _blockCursor = blockCursor; +} + +int getBlockCursor(void) +{ + return _blockCursor; +} + +static void drawBlinkingCursor(void) +{ + static int clearCursor = 0; + static long lastTime = 0; + + SDL_Rect rect; + + if ((SDL_GetTicks() - lastTime) > 500) + { + lastTime = SDL_GetTicks(); + + rect.x = indexX * pixelSize * 7; + rect.y = indexY * pixelSize * 8; + rect.w = pixelSize * 7; + rect.h = pixelSize * 8; + + if (clearCursor) + SDL_FillRect(screen, &rect, 0); + else + drawCharac(rect.x, rect.y, 0, 255, 0, (unsigned char)(_blockCursor ? 0x01 : 0x40)); + + SDL_UpdateRect(screen, rect.x, rect.y, rect.w, rect.h); + + clearCursor = !clearCursor; + } +} + +void redrawScreen(void) +{ + int xPosition, yPosition; + int i, j; + + SDL_FillRect(screen, NULL, 0); + + for (i = 0; i < 40; i++) + { + for (j = 0; j < 24; j++) + { + xPosition = i * pixelSize * 7; + yPosition = j * pixelSize * 8; + + drawCharac(xPosition, yPosition, 0, 255, 0, screenTbl[j * 40 + i]); + } + } + + if (!_blinkCursor) + drawCharac(indexX * pixelSize * 7, indexY * pixelSize * 8, 0, 255, 0, (unsigned char)(_blockCursor ? 0x01 : 0x40)); + + SDL_UpdateRect(screen, 0, 0, 0, 0); +} + +void resetScreen(void) +{ + indexX = indexY = 0; + + memset(screenTbl, 0, 960); + + lastTime = SDL_GetTicks(); + + redrawScreen(); +} + +void updateScreen(void) +{ + unsigned char dsp = readDsp(); + + if (dsp & 0x80) + { + outputDsp(dsp); + redrawScreen(); + synchronizeOutput(); + } + else if (_blinkCursor) + drawBlinkingCursor(); +} + +void drawCharacter(int xPosition, int yPosition, unsigned char r, unsigned char g, unsigned char b, unsigned char characNumber) +{ + if (_scanlines) + { + _scanlines = 0; + drawCharac(xPosition, yPosition, 0, 0, 0, characNumber); + _scanlines = 1; + } + else + drawCharac(xPosition, yPosition, 0, 0, 0, characNumber); +} + +void initScreen(void) +{ + screen = SDL_GetVideoSurface(); +} diff --git a/src/screen.h b/src/screen.h new file mode 100644 index 0000000..f64e16b --- /dev/null +++ b/src/screen.h @@ -0,0 +1,42 @@ +// Pom1 Apple 1 Emulator +// Copyright (C) 2000 Verhille Arnaud +// Copyright (C) 2012 John D. Corrado +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +#ifndef __SCREEN_H__ +#define __SCREEN_H__ + +int loadCharMap(void); +void resetScreen(void); +void setPixelSize(int ps); +int getPixelSize(void); +void setScanlines(int scanlines); +int getScanlines(void); +void setTerminalSpeed(int ts); +int getTerminalSpeed(void); +void redrawScreen(void); +void updateScreen(void); +void drawCharacter(int xPosition, int yPosition, unsigned char r, unsigned char g, unsigned char b, unsigned char characNumber); +void setFullscreen(int fullscreen); +int getFullscreen(void); +void drawCursor(void); +void setBlinkCursor(int blickCursor); +int getBlinkCursor(void); +void setBlockCursor(int blockCursor); +int getBlockCursor(void); +void initScreen(void); + +#endif