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John D. Corrado 2015-07-31 13:28:40 -04:00
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aclocal.m4
config.h
config.h.in
config.log
config.status
configure
depcomp
INSTALL
install-sh
Makefile
Makefile.in
missing
stamp-h1

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John D. Corrado <jdcorrado@gmail.com>
Verhille Arnaud

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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.
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Copyright (C) <year> <name of author>
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(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
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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
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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
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The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or your
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
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library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

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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

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DOC_FILES = \
AUTHORS \
ChangeLog \
NEWS \
README
EXTRA_DIST = $(DOC_FILES)
docdir = $(prefix)/share/doc/@PACKAGE@
doc_DATA = $(DOC_FILES)
SUBDIRS = src
DIST_SUBDIRS = src

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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.

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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/

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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

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Makefile
Makefile.in
pom1
pom1-1.0.0
pom1.desktop
.deps
*.o

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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

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// 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#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);
}
}

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// 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

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// 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;
}

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// 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

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// 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

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// 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;
}

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// 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#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);
}

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// 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

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// 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;
}
}
}
}

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// 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

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// 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;
}

32
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// 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

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[Desktop Entry]
Name=@PACKAGE_NAME@
Exec=pom1
Icon=pom1
Type=Application
Comment=@PACKAGE_SHORTDESC@
Categories=Emulator;

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#!/bin/sh
export POM1ROMDIR="@prefix@/share/@PACKAGE@/roms"
pom1-@PACKAGE_VERSION@ $@

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Makefile
Makefile.in

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ROMFILES = \
basic.rom \
charmap.rom \
monitor.rom
romdir = $(prefix)/share/@PACKAGE@/roms
rom_DATA = $(ROMFILES)
EXTRA_DIST = $(ROMFILES)

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// 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 "pia6820.h"
static unsigned char charac[1024], screenTbl[960];
static int indexX, indexY, pixelSize = 2, _scanlines = 0, terminalSpeed = 60;
static long lastTime;
static int _fullscreen = 0;
static int _blinkCursor = 1, _blockCursor = 0;
static SDL_Surface *screen;
int loadCharMap(void)
{
const char *romdir = getRomDirectory();
char *filename;
FILE *fp;
filename = (char *)malloc(strlen(romdir) + 13);
sprintf(filename, "%s/charmap.rom", romdir);
fp = fopen(filename, "rb");
free(filename);
if (fp)
{
fread(charac, 1, 1024, fp);
fclose(fp);
}
else
return 0;
return 1;
}
void setPixelSize(int ps)
{
pixelSize = ps;
}
int getPixelSize(void)
{
return pixelSize;
}
void setScanlines(int scanlines)
{
_scanlines = scanlines;
}
int getScanlines(void)
{
return _scanlines;
}
void setTerminalSpeed(int ts)
{
terminalSpeed = ts;
}
int getTerminalSpeed(void)
{
return terminalSpeed;
}
static void synchronizeOutput(void)
{
int sleepMillis = ((1000 / terminalSpeed) - (SDL_GetTicks() - lastTime));
if (sleepMillis > 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();
}

42
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// 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