int main(int argc, const char *argv[])
{
ez::ezOptionParser opt;
opt.overview = "GenEmu -- Sega Genesis Emulator";
opt.syntax = "genemu [OPTIONS] rom";
opt.add("",0,0,0,"Display usage instructions.", "-h", "--help");
opt.add("",0,-1,',',"Apply Game Genie codes [format=ABCD-EFGH]", "--gamegenie", "--gg");
opt.add("",0,1,0,"Force console type [accepted values: PAL or NTSC]", "--mode", "--type");
opt.add("",0,-1,',',"Make screenshots on the specified frames and exit", "--screenshots");
opt.add("",0,1,0,"Load from saved state", "--load");
opt.parse(argc, argv);
if (opt.isSet("-h"))
{
std::string usage;
opt.getUsage(usage, 120);
std::cout << usage;
return 0;
}
std::vector<std::string*> args;
if (opt.firstArgs.size() >= 2)
{
strcpy(romname, opt.firstArgs[1]->c_str());
}
else if (opt.lastArgs.size() >= 1)
strcpy(romname, opt.lastArgs[0]->c_str());
else
{
std::cerr << "ERROR: no ROM specified\n";
return 2;
}
int romsize;
if (strstr(romname, ".smd"))
romsize = load_smd(romname);
else
romsize = load_bin(romname);
mem_init(romsize);
#if 0
uint16_t checksum = 0;
for (int i=0;i<(romsize-512)/2;i++)
checksum += m68k_read_memory_16(512+i*2);
assert(checksum == m68k_read_memory_16(0x18e));
#endif
#if 1
char buf[256];
int pc = 0;
strcpy(buf, argv[1]);
strcat(buf, ".asm");
FILE *f = fopen(buf, "w");
while (pc < romsize) {
int oplen = m68k_disassemble(buf, pc, M68K_CPU_TYPE_68000);
fprintf(f, "%06x\t%s\n", pc, buf);
pc += oplen;
}
fclose(f);
#endif
if (opt.isSet("--mode"))
{
std::string mode;
opt.get("--mode")->getString(mode);
if (mode == "PAL")
{
VERSION_PAL = 1;
std::cerr << "Forced mode: PAL\n";
}
else if (mode == "NTSC")
{
VERSION_PAL = 0;
std::cerr << "Forced mode: NTSC\n";
}
else
{
std::cerr << "ERROR: invalid mode: " << mode << std::endl;
return 2;
}
}
std::vector<int> ss_frames;
int ss_idx = 0;
hw_init(YM2612_FREQ, VERSION_PAL ? 50 : 60);
if (!opt.isSet("--screenshots"))
{
hw_enable_video(true);
hw_enable_audio(true);
gfx_enable(true);
}
else
{
opt.get("--screenshots")->getInts(ss_frames);
}
CPU_M68K.init();
CPU_Z80.init();
MASTER_CLOCK = 0;
CPU_M68K.reset();
VDP.reset();
if (opt.isSet("--load"))
{
std::string sn;
opt.get("--load")->getString(sn);
loadstate(sn.c_str());
}
while (hw_poll())
{
if (ss_idx < ss_frames.size() && framecounter == ss_frames[ss_idx])
{
gfx_enable(true);
}
int numscanlines = VDP.num_scanlines();
uint8_t *screen;
int pitch;
hw_beginframe(&screen, &pitch);
int16_t *audio; int nsamples;
hw_beginaudio(&audio, &nsamples);
int audio_index = 0;
int audio_step = (nsamples << 16) / numscanlines;
for (int sl=0;sl<numscanlines;++sl)
{
CPU_M68K.run(MASTER_CLOCK + VDP_CYCLES_PER_LINE);
CPU_Z80 .run(MASTER_CLOCK + VDP_CYCLES_PER_LINE);
vdp_scanline(screen);
screen += pitch;
int prev_index = audio_index;
audio_index += audio_step;
YM2612Update(audio + ((prev_index+0x8000)>>16)*2, (audio_index-prev_index+0x8000)>>16);
MASTER_CLOCK += VDP_CYCLES_PER_LINE;
}
hw_endaudio();
hw_endframe();
if (framecounter == 100 && opt.isSet("--gamegenie"))
{
std::vector<std::string> codes;
opt.get("--gamegenie")->getStrings(codes);
for (int i=0;i<codes.size();++i)
mem_apply_gamegenie(codes[i].c_str());
}
if (ss_idx < ss_frames.size() && framecounter == ss_frames[ss_idx])
{
static char ssname[2048];
sprintf(ssname, "%s.%d.%s.bmp", romname, framecounter, (VERSION_PAL ? "PAL" : "NTSC"));
std::cerr << "Saving screenshot " << ssname << std::endl;
hw_save_screenshot(ssname);
sprintf(ssname, "%s.%d.%s.gs", romname, framecounter, (VERSION_PAL ? "PAL" : "NTSC"));
savestate(ssname);
++ss_idx;
if (ss_idx == ss_frames.size())
break;
}
++framecounter;
state_poll();
}
#if 0
checksum = 0;
for (int i=0;i<(romsize-512)/2;i++)
checksum += m68k_read_memory_16(512+i*2);
assert(checksum == m68k_read_memory_16(0x18e));
#endif
#if 0
{
char buf[256];
int pc = 0xffffee00;
FILE *f = fopen(buf, "w");
while (pc <= 0xffffef00) {
int oplen = m68k_disassemble(buf, pc, M68K_CPU_TYPE_68000);
fprintf(stdout, "%06x\t%s\n", pc, buf);
pc += oplen;
}
fclose(f);
}
#endif
return 0;
}
unsigned int m68k_read_disassembler_16(unsigned int address)
{
return m68k_read_memory_16(address);
}