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region detection, cd states wip, fixes, stuff

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@25 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz 2007-01-28 22:51:16 +00:00
parent cb0316e4c5
commit 51a902ae25
26 changed files with 520 additions and 291 deletions
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151
Pico/cd/Area.c Normal file
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// This is part of Pico Library
// (c) Copyright 2006 notaz, All rights reserved.
// Free for non-commercial use.
// For commercial use, separate licencing terms must be obtained.
#include "../PicoInt.h"
// ym2612
#include "../sound/ym2612.h"
// sn76496
extern int *sn76496_regs;
typedef enum {
CHUNK_M68K = 1,
CHUNK_RAM,
CHUNK_VRAM,
CHUNK_ZRAM,
CHUNK_CRAM,
CHUNK_VSRAM,
CHUNK_MISC,
CHUNK_VIDEO,
CHUNK_Z80,
CHUNK_PSG,
CHUNK_FM,
// CD stuff
} chunk_name_e;
static int write_chunk(chunk_name_e name, int len, void *data, void *file)
{
size_t bwritten = 0;
bwritten += areaWrite(&name, 1, 1, file);
bwritten += areaWrite(&len, 1, 4, file);
bwritten += areaWrite(data, 1, len, file);
return (bwritten == len + 4 + 1);
}
#define CHECKED_WRITE(name,len,data) \
if (!write_chunk(name, len, data, file)) return 1;
#define CHECKED_WRITE_BUFF(name,buff) \
if (!write_chunk(name, sizeof(buff), &buff, file)) return 1;
int PicoCdSaveState(void *file)
{
unsigned char buff[0x60];
void *ym2612_regs = YM2612GetRegs();
areaWrite("PicoSMCD", 1, 8, file);
areaWrite(&PicoVer, 1, 4, file);
memset(buff, 0, sizeof(buff));
PicoAreaPackCpu(buff, 0);
CHECKED_WRITE_BUFF(CHUNK_M68K, buff);
CHECKED_WRITE_BUFF(CHUNK_RAM, Pico.ram);
CHECKED_WRITE_BUFF(CHUNK_VRAM, Pico.vram);
CHECKED_WRITE_BUFF(CHUNK_ZRAM, Pico.zram);
CHECKED_WRITE_BUFF(CHUNK_CRAM, Pico.cram);
CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram);
CHECKED_WRITE_BUFF(CHUNK_MISC, Pico.m);
CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video);
if(PicoOpt&7) {
memset(buff, 0, sizeof(buff));
z80_pack(buff);
CHECKED_WRITE_BUFF(CHUNK_Z80, buff);
}
if(PicoOpt&3)
CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs);
if(PicoOpt&1)
CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs);
// TODO: cd stuff
return 0;
}
static int g_read_offs = 0;
#define CHECKED_READ(len,data) \
if (areaRead(data, 1, len, file) != len) { \
g_read_offs += len; \
printf("areaRead: premature EOF\n"); \
return 0; \
}
#define R_ERROR_RETURN(error) \
{ \
printf("PicoCdLoadState @ %x: " error "\n", g_read_offs); \
return 1; \
}
#define CHECKED_READ2(len2,data) \
if (len2 != len) R_ERROR_RETURN("unexpected len, wanted " #len2); \
CHECKED_READ(len2, data)
#define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff);
int PicoCdLoadState(void *file)
{
unsigned char buff[0x60];
int ver, len;
void *ym2612_regs = YM2612GetRegs();
g_read_offs = 0;
CHECKED_READ(8, buff);
if (strncmp((char *)buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
CHECKED_READ(4, &ver);
while (!areaEof(file))
{
CHECKED_READ(1, buff);
CHECKED_READ(4, &len);
if (len < 0 || len > 1024*256) R_ERROR_RETURN("bad length");
switch (buff[0])
{
case CHUNK_M68K:
CHECKED_READ_BUFF(buff);
PicoAreaUnpackCpu(buff, 0);
break;
case CHUNK_Z80:
CHECKED_READ_BUFF(buff);
z80_unpack(buff);
break;
case CHUNK_RAM: CHECKED_READ_BUFF(Pico.ram); break;
case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); break;
case CHUNK_ZRAM: CHECKED_READ_BUFF(Pico.zram); break;
case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); break;
case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); break;
case CHUNK_MISC: CHECKED_READ_BUFF(Pico.m); break;
case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); break;
case CHUNK_PSG: CHECKED_READ2(28*4, sn76496_regs); break;
case CHUNK_FM:
CHECKED_READ2(0x200+4, ym2612_regs);
YM2612PicoStateLoad();
break;
}
}
return 0;
}