int get_save_state_size(void){
int ssize = 0;
//davex: header is not saved in a memory state
ssize = sizeof(vdp_t); // VDP context
ssize += sizeof(sms_t); //SMS context (1/3)
//SMS context (2/3)
ssize += 1; //fputc(cart.fcr[0], fd);
ssize += 1; //fputc(cart.fcr[1], fd);
ssize += 1; //fputc(cart.fcr[2], fd);
ssize += 1; //fputc(cart.fcr[3], fd);
//SMS context (3/3)
ssize += 0x8000;
//Z80 context
ssize += sizeof(Z80_Regs);
ssize += sizeof(int);
//YM2413 context
ssize += FM_GetContextSize();
//SN76489 context
ssize += SN76489_GetContextSize();
return ssize;
}
void system_save_state(void *fd)
{
char *id = STATE_HEADER;
uint16 version = STATE_VERSION;
/* Write header */
fwrite(id, sizeof(id), 1, fd);
fwrite(&version, sizeof(version), 1, fd);
/* Save VDP context */
fwrite(&vdp, sizeof(vdp_t), 1, fd);
/* Save SMS context */
fwrite(&sms, sizeof(sms_t), 1, fd);
fputc(cart.fcr[0], fd);
fputc(cart.fcr[1], fd);
fputc(cart.fcr[2], fd);
fputc(cart.fcr[3], fd);
fwrite(cart.sram, 0x8000, 1, fd);
/* Save Z80 context */
fwrite(Z80_Context, sizeof(Z80_Regs), 1, fd);
fwrite(&after_EI, sizeof(int), 1, fd);
/* Save YM2413 context */
fwrite(FM_GetContextPtr(), FM_GetContextSize(), 1, fd);
/* Save SN76489 context */
fwrite(SN76489_GetContextPtr(0), SN76489_GetContextSize(), 1, fd);
}
int sound_context_save(uint8 *state)
{
int bufferptr = 0;
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
bufferptr = YM2612SaveContext(state);
}
else
{
save_param(YM2413GetContextPtr(),YM2413GetContextSize());
}
save_param(SN76489_GetContextPtr(),SN76489_GetContextSize());
save_param(&fm_cycles_start,sizeof(fm_cycles_start));
return bufferptr;
}
int save_state_to_mem(void *stor){
//davex: header is not saved in a memory state
memcpy(stor, &vdp, sizeof(vdp_t)); //VDP context
stor += sizeof(vdp_t);
//SMS context (1/3)
memcpy(stor, &sms, sizeof(sms_t) );
stor += sizeof(sms_t);
//SMS context (2/3)
memcpy(stor, &cart.fcr[0], 1 );
stor += 1;
memcpy(stor, &cart.fcr[1], 1 );
stor += 1;
memcpy(stor, &cart.fcr[2], 1 );
stor += 1;
memcpy(stor, &cart.fcr[3], 1 );
stor += 1;
//SMS context (3/3)
memcpy(stor, &cart.sram, 0x8000);
stor += 0x8000;
// Z80 context
memcpy( stor, Z80_Context, sizeof(Z80_Regs) );
stor += sizeof(Z80_Regs);
memcpy( stor, &after_EI, sizeof(int) );
stor += sizeof(int);
// YM2413 context
memcpy( stor, FM_GetContextPtr(), FM_GetContextSize() );
stor += FM_GetContextSize();
// SN76489 context
memcpy(stor, SN76489_GetContextPtr(0), SN76489_GetContextSize() );
//stor += SN76489_GetContextSize();
return 1;
}
int sound_context_load(uint8 *state)
{
int bufferptr = 0;
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
bufferptr = YM2612LoadContext(state);
YM2612Config(config.dac_bits);
}
else
{
load_param(YM2413GetContextPtr(),YM2413GetContextSize());
}
load_param(SN76489_GetContextPtr(),SN76489_GetContextSize());
load_param(&fm_cycles_start,sizeof(fm_cycles_start));
fm_cycles_count = fm_cycles_start;
return bufferptr;
}
int state_load(unsigned char *buffer)
{
/* buffer size */
int bufferptr = 0;
/* uncompress savestate */
unsigned long inbytes, outbytes;
memcpy(&inbytes, buffer, 4);
outbytes = STATE_SIZE;
uncompress ((Bytef *)state, &outbytes, (Bytef *)(buffer + 4), inbytes);
/* version check */
char version[16];
load_param(version,16);
if (strncmp(version,STATE_VERSION,16))
{
return 0;
}
/* reset system */
system_reset();
m68k_memory_map[0].base = default_rom;
// GENESIS
load_param(work_ram, sizeof(work_ram));
load_param(zram, sizeof(zram));
load_param(&zbusreq, sizeof(zbusreq));
load_param(&zreset, sizeof(zreset));
load_param(&zbank, sizeof(zbank));
zbusack = 1 ^(zbusreq & zreset);
// IO
load_param(io_reg, sizeof(io_reg));
// VDP
uint8 temp_reg[0x20];
load_param(sat, sizeof(sat));
load_param(vram, sizeof(vram));
load_param(cram, sizeof(cram));
load_param(vsram, sizeof(vsram));
load_param(temp_reg, sizeof(temp_reg));
load_param(&addr, sizeof(addr));
load_param(&addr_latch, sizeof(addr_latch));
load_param(&code, sizeof(code));
load_param(&pending, sizeof(pending));
load_param(&status, sizeof(status));
load_param(&dmafill, sizeof(dmafill));
load_param(&hint_pending, sizeof(hint_pending));
load_param(&vint_pending, sizeof(vint_pending));
load_param(&irq_status, sizeof(irq_status));
vdp_restore(temp_reg);
// FM
YM2612Restore(&state[bufferptr]);
bufferptr+= YM2612GetContextSize();
// PSG
load_param(SN76489_GetContextPtr(),SN76489_GetContextSize());
// 68000
uint16 tmp16;
uint32 tmp32;
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D0, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D1, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D2, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D3, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D4, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D5, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D6, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D7, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A0, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A1, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A2, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A3, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A4, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A5, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A6, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A7, tmp32);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_PC, tmp32);
load_param(&tmp16, 2); m68k_set_reg(M68K_REG_SR, tmp16);
load_param(&tmp32, 4); m68k_set_reg(M68K_REG_USP,tmp32);
// Z80
load_param(&Z80, sizeof(Z80_Regs));
return 1;
}
int state_save(unsigned char *buffer)
{
/* buffer size */
int bufferptr = 0;
/* version string */
char version[16];
strncpy(version,STATE_VERSION,16);
save_param(version, 16);
// GENESIS
save_param(work_ram, sizeof(work_ram));
save_param(zram, sizeof(zram));
save_param(&zbusreq, sizeof(zbusreq));
save_param(&zreset, sizeof(zreset));
save_param(&zbank, sizeof(zbank));
// IO
save_param(io_reg, sizeof(io_reg));
// VDP
save_param(sat, sizeof(sat));
save_param(vram, sizeof(vram));
save_param(cram, sizeof(cram));
save_param(vsram, sizeof(vsram));
save_param(reg, sizeof(reg));
save_param(&addr, sizeof(addr));
save_param(&addr_latch, sizeof(addr_latch));
save_param(&code, sizeof(code));
save_param(&pending, sizeof(pending));
save_param(&status, sizeof(status));
save_param(&dmafill, sizeof(dmafill));
save_param(&hint_pending, sizeof(hint_pending));
save_param(&vint_pending, sizeof(vint_pending));
save_param(&irq_status, sizeof(irq_status));
// FM
save_param(YM2612GetContextPtr(),YM2612GetContextSize());
// PSG
save_param(SN76489_GetContextPtr(),SN76489_GetContextSize());
// 68000
uint16 tmp16;
uint32 tmp32;
tmp32 = m68k_get_reg(NULL, M68K_REG_D0); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_D1); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_D2); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_D3); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_D4); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_D5); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_D6); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_D7); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_A0); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_A1); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_A2); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_A3); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_A4); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_A5); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_A6); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_A7); save_param(&tmp32, 4);
tmp32 = m68k_get_reg(NULL, M68K_REG_PC); save_param(&tmp32, 4);
tmp16 = m68k_get_reg(NULL, M68K_REG_SR); save_param(&tmp16, 2);
tmp32 = m68k_get_reg(NULL, M68K_REG_USP); save_param(&tmp32, 4);
// Z80
save_param(&Z80, sizeof(Z80_Regs));
/* compress state file */
unsigned long inbytes = bufferptr;
unsigned long outbytes = STATE_SIZE;
compress2 ((Bytef *)(buffer + 4), &outbytes, (Bytef *)state, inbytes, 9);
memcpy(buffer, &outbytes, 4);
/* return total size */
return (outbytes + 4);
}
void system_load_state(void *fd)
{
int i;
uint8 *buf;
char id[4];
uint16 version;
/* Initialize everything */
z80_reset(0);
z80_set_irq_callback(sms_irq_callback);
system_reset();
if(snd.enabled)
sound_reset();
/* Read header */
fread(id, 4, 1, fd);
fread(&version, 2, 1, fd);
/* Load VDP context */
fread(&vdp, sizeof(vdp_t), 1, fd);
/* Load SMS context */
fread(&sms, sizeof(sms_t), 1, fd);
cart.fcr[0] = fgetc(fd);
cart.fcr[1] = fgetc(fd);
cart.fcr[2] = fgetc(fd);
cart.fcr[3] = fgetc(fd);
fread(cart.sram, 0x8000, 1, fd);
/* Load Z80 context */
fread(Z80_Context, sizeof(Z80_Regs), 1, fd);
fread(&after_EI, sizeof(int), 1, fd);
/* Load YM2413 context */
buf = malloc(FM_GetContextSize());
fread(buf, FM_GetContextSize(), 1, fd);
FM_SetContext(buf);
free(buf);
/* Load SN76489 context */
buf = malloc(SN76489_GetContextSize());
fread(buf, SN76489_GetContextSize(), 1, fd);
SN76489_SetContext(0, buf);
free(buf);
/* Restore callbacks */
z80_set_irq_callback(sms_irq_callback);
for(i = 0x00; i <= 0x2F; i++)
{
cpu_readmap[i] = &cart.rom[(i & 0x1F) << 10];
cpu_writemap[i] = dummy_write;
}
for(i = 0x30; i <= 0x3F; i++)
{
cpu_readmap[i] = &sms.wram[(i & 0x07) << 10];
cpu_writemap[i] = &sms.wram[(i & 0x07) << 10];
}
sms_mapper_w(3, cart.fcr[3]);
sms_mapper_w(2, cart.fcr[2]);
sms_mapper_w(1, cart.fcr[1]);
sms_mapper_w(0, cart.fcr[0]);
/* Force full pattern cache update */
bg_list_index = 0x200;
for(i = 0; i < 0x200; i++)
{
bg_name_list[i] = i;
bg_name_dirty[i] = -1;
}
/* Restore palette */
for(i = 0; i < PALETTE_SIZE; i++)
palette_sync(i, 1);
viewport_check();
}