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BizHawk/waterbox/gpgx/cinterface/cinterface.c

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#include <stddef.h>
#include <stdarg.h>
#include <stdio.h>
#include <emulibc.h>
#include "callbacks.h"
#include <shared.h>
#include <genesis.h>
#include <md_ntsc.h>
#include <sms_ntsc.h>
#include <eeprom_i2c.h>
#include <vdp_render.h>
#include <debug/cpuhook.h>
// Functions added by us to peek at static structs
// (this is much less invasive than not making them static FYI)
extern int eeprom_i2c_get_size(void);
extern int sms_cart_is_codies(void);
extern int sms_cart_bootrom_size(void);
struct config_t config;
char GG_ROM[256] = "GG_ROM"; // game genie rom
char AR_ROM[256] = "AR_ROM"; // actin replay rom
char SK_ROM[256] = "SK_ROM"; // sanic and knuckles
char SK_UPMEM[256] = "SK_UPMEM"; // sanic and knuckles
char GG_BIOS[256] = "GG_BIOS"; // game gear bootrom
char CD_BIOS_EU[256] = "CD_BIOS_EU"; // cd bioses
char CD_BIOS_US[256] = "CD_BIOS_US";
char CD_BIOS_JP[256] = "CD_BIOS_JP";
char MD_BIOS[256] = "MD_BIOS"; // genesis tmss bootrom
char MS_BIOS_US[256] = "MS_BIOS_US"; // master system bioses
char MS_BIOS_EU[256] = "MS_BIOS_EU";
char MS_BIOS_JP[256] = "MS_BIOS_JP";
char romextension[4];
static int16 soundbuffer[4096];
static int nsamples;
int cinterface_force_sram;
int cinterface_render_bga = 1;
int cinterface_render_bgb = 1;
int cinterface_render_bgw = 1;
int cinterface_render_obj = 1;
uint8 cinterface_custom_backdrop = 0;
uint32 cinterface_custom_backdrop_color = 0xffff00ff; // pink
extern uint8 border;
#define GPGX_EX ECL_EXPORT
static int vwidth;
static int vheight;
static uint8_t brm_format[0x40] =
{
0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x00,0x00,0x00,0x00,0x40,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x53,0x45,0x47,0x41,0x5f,0x43,0x44,0x5f,0x52,0x4f,0x4d,0x00,0x01,0x00,0x00,0x00,
0x52,0x41,0x4d,0x5f,0x43,0x41,0x52,0x54,0x52,0x49,0x44,0x47,0x45,0x5f,0x5f,0x5f
};
ECL_ENTRY void (*biz_execcb)(unsigned addr);
ECL_ENTRY void (*biz_readcb)(unsigned addr);
ECL_ENTRY void (*biz_writecb)(unsigned addr);
CDCallback biz_cdcb = NULL;
ECL_ENTRY void (*cdd_readcallback)(int lba, void *dest, int subcode);
uint8 *tempsram;
static void update_viewport(void)
{
vwidth = bitmap.viewport.w + (bitmap.viewport.x * 2);
vheight = bitmap.viewport.h + (bitmap.viewport.y * 2);
if (config.ntsc)
{
if (reg[12] & 1)
vwidth = MD_NTSC_OUT_WIDTH(vwidth);
else
vwidth = SMS_NTSC_OUT_WIDTH(vwidth);
}
if (config.render && interlaced)
{
vheight = vheight * 2;
}
}
GPGX_EX void gpgx_get_video(int *w, int *h, int *pitch, void **buffer)
{
if (w)
*w = vwidth;
if (h)
*h = vheight;
if (pitch)
*pitch = bitmap.pitch;
if (buffer)
*buffer = bitmap.data;
}
GPGX_EX void gpgx_get_audio(int *n, void **buffer)
{
if (n)
*n = nsamples;
if (buffer)
*buffer = soundbuffer;
}
// this is most certainly wrong for interlacing
GPGX_EX void gpgx_get_fps(int *num, int *den)
{
if (vdp_pal)
{
if (num)
*num = 53203424;
if (den)
*den = 3420 * 313;
}
else
{
if (num)
*num = 53693175;
if (den)
*den = 3420 * 262;
}
}
void osd_input_update(void)
{
}
ECL_ENTRY void (*input_callback_cb)(void);
void real_input_callback(void)
{
if (input_callback_cb)
input_callback_cb();
}
GPGX_EX void gpgx_set_input_callback(ECL_ENTRY void (*fecb)(void))
{
input_callback_cb = fecb;
}
GPGX_EX void gpgx_set_cdd_callback(ECL_ENTRY void (*cddcb)(int lba, void *dest, int subcode))
{
cdd_readcallback = cddcb;
}
ECL_ENTRY int (*load_archive_cb)(const char *filename, unsigned char *buffer, int maxsize);
// return 0 on failure, else actual loaded size
// extension, if not null, should be populated with the extension of the file loaded
// (up to 3 chars and null terminator, no more)
int load_archive(const char *filename, unsigned char *buffer, int maxsize, char *extension)
{
if (extension)
memcpy(extension, romextension, 4);
return load_archive_cb(filename, buffer, maxsize);
}
GPGX_EX int gpgx_get_control(t_input *dest, int bytes)
{
if (bytes != sizeof(t_input))
return 0;
memcpy(dest, &input, sizeof(t_input));
return 1;
}
GPGX_EX int gpgx_put_control(t_input *src, int bytes)
{
if (bytes != sizeof(t_input))
return 0;
memcpy(&input, src, sizeof(t_input));
return 1;
}
GPGX_EX void gpgx_advance(void)
{
if (system_hw == SYSTEM_MCD)
system_frame_scd(0);
else if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
system_frame_gen(0);
else
system_frame_sms(0);
if (bitmap.viewport.changed & 1)
{
bitmap.viewport.changed &= ~1;
update_viewport();
}
nsamples = audio_update(soundbuffer);
}
extern toc_t pending_toc;
extern int8 cd_index;
GPGX_EX void gpgx_swap_disc(const toc_t* toc, int8 index)
{
if (system_hw == SYSTEM_MCD)
{
if (toc)
{
char header[0x210];
cd_index = index;
memcpy(&pending_toc, toc, sizeof(toc_t));
cdd_load("HOTSWAP_CD", header);
}
else
{
cd_index = -1;
cdd_unload();
}
cdd_reset();
}
}
typedef struct
{
uint32 width; // in cells
uint32 height;
uint32 baseaddr;
} nametable_t;
typedef struct
{
uint8 *vram; // 64K vram
uint8 *patterncache; // every pattern, first normal, then hflip, vflip, bothflip
uint32 *colorcache; // 64 colors
nametable_t nta;
nametable_t ntb;
nametable_t ntw;
} vdpview_t;
extern uint8 bg_pattern_cache[0x80000];
uint32_t pixel[0x100];
GPGX_EX void gpgx_get_vdp_view(vdpview_t *view)
{
view->vram = vram;
view->patterncache = bg_pattern_cache;
view->colorcache = pixel + 0x40;
view->nta.width = 1 << (playfield_shift - 1);
view->ntb.width = 1 << (playfield_shift - 1);
view->nta.height = (playfield_row_mask + 1) >> 3;
view->ntb.height = (playfield_row_mask + 1) >> 3;
view->ntw.width = 1 << (5 + (reg[12] & 1));
view->ntw.height = 32;
view->nta.baseaddr = ntab;
view->ntb.baseaddr = ntbb;
view->ntw.baseaddr = ntwb;
}
// internal: computes sram size (no brams)
static int saveramsize(void)
{
// the variables in SRAM_T are all part of "configuration", so we don't have to save those.
// the only thing that needs to be saved is the SRAM itself and the SEEPROM struct (if applicable)
if (!sram.on)
return 0;
switch (sram.custom)
{
case 0: // plain bus access saveram
break;
case 1: // i2c
return eeprom_i2c_get_size();
case 2: // spi
return sizeof(sram.sram); // it doesn't appear to mask anything internally
case 3: // 93c
return 128; // limited to 128 bytes (note: SMS only)
default:
return sizeof(sram.sram); // ???
}
// figure size for plain bus access saverams
{
int startaddr = sram.start / 8192;
int endaddr = sram.end / 8192 + 1;
int size = (endaddr - startaddr) * 8192;
return size;
}
}
GPGX_EX void gpgx_clear_sram(void)
{
// clear sram
if (sram.on)
memset(sram.sram, 0xff, 0x10000);
if (cdd.loaded)
{
// clear and format bram
memset(scd.bram, 0, 0x2000);
brm_format[0x10] = brm_format[0x12] = brm_format[0x14] = brm_format[0x16] = 0x00;
brm_format[0x11] = brm_format[0x13] = brm_format[0x15] = brm_format[0x17] = (0x2000 / 64) - 3;
memcpy(scd.bram + 0x2000 - 0x40, brm_format, 0x40);
if (scd.cartridge.id)
{
// clear and format ebram
memset(scd.cartridge.area, 0x00, scd.cartridge.mask + 1);
brm_format[0x10] = brm_format[0x12] = brm_format[0x14] = brm_format[0x16] = (((scd.cartridge.mask + 1) / 64) - 3) >> 8;
brm_format[0x11] = brm_format[0x13] = brm_format[0x15] = brm_format[0x17] = (((scd.cartridge.mask + 1) / 64) - 3) & 0xff;
memcpy(scd.cartridge.area + scd.cartridge.mask + 1 - 0x40, brm_format, 0x40);
}
}
}
// a bit hacky:
// in order to present a single memory block to the frontend,
// we copy the both the bram and the ebram to another area
GPGX_EX void* gpgx_get_sram(int *size)
{
if (sram.on)
{
// codies is not actually battery backed, don't expose it as SRAM
if (sms_cart_is_codies())
{
*size = 0;
return NULL;
}
*size = saveramsize();
return sram.sram;
}
else if (cdd.loaded && scd.cartridge.id)
{
int sz = scd.cartridge.mask + 1;
memcpy(tempsram, scd.cartridge.area, sz);
memcpy(tempsram + sz, scd.bram, 0x2000);
*size = sz + 0x2000;
return tempsram;
}
else if (cdd.loaded)
{
*size = 0x2000;
return scd.bram;
}
else if (scd.cartridge.id)
{
*size = scd.cartridge.mask + 1;
return scd.cartridge.area;
}
else
{
*size = 0;
return NULL;
}
}
GPGX_EX int gpgx_put_sram(const uint8 *data, int size)
{
if (sram.on)
{
if (size != saveramsize())
return 0;
memcpy(sram.sram, data, size);
return 1;
}
else if (cdd.loaded && scd.cartridge.id)
{
int sz = scd.cartridge.mask + 1;
if (size != sz + 0x2000)
return 0;
memcpy(scd.cartridge.area, data, sz);
memcpy(scd.bram, data + sz, 0x2000);
return 1;
}
else if (cdd.loaded)
{
if (size != 0x2000)
return 0;
memcpy(scd.bram, data, size);
return 1;
}
else if (scd.cartridge.id)
{
int sz = scd.cartridge.mask + 1;
if (size != sz)
return 0;
memcpy(scd.cartridge.area, data, size);
return 1;
}
else
{
if (size != 0)
return 0;
return 1; // "successful"?
}
}
GPGX_EX void gpgx_poke_cram(int addr, uint8 val)
{
uint16 *p;
uint16 data;
int index;
p = (uint16 *)&cram[addr & 0x7E];
data = *p;
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
data = ((data & 0x1C0) << 3) | ((data & 0x038) << 2) | ((data & 0x007) << 1);
}
if (addr & 1)
{
data &= 0xFF00;
data |= val;
}
else
{
data &= 0x00FF;
data |= val << 8;
}
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
data = ((data & 0xE00) >> 3) | ((data & 0x0E0) >> 2) | ((data & 0x00E) >> 1);
}
if (*p != data)
{
index = (addr >> 1) & 0x3F;
*p = data;
if (index & 0x0F)
{
color_update_m5(index, data);
}
if (index == border)
{
color_update_m5(0x00, data);
}
}
}
GPGX_EX void gpgx_poke_vram(int addr, uint8 val)
{
uint8 *p;
addr &= 0xFFFF;
p = &vram[addr];
if (*p != val)
{
int name;
*p = val;
// copy of MARK_BG_DIRTY(addr) (to avoid putting this code in vdp_ctrl.c)
name = (addr >> 5) & 0x7FF;
if (bg_name_dirty[name] == 0)
{
bg_name_list[bg_list_index++] = name;
}
bg_name_dirty[name] |= (1 << ((addr >> 2) & 7));
}
}
GPGX_EX void gpgx_flush_vram(void)
{
if (bg_list_index)
{
update_bg_pattern_cache(bg_list_index);
bg_list_index = 0;
}
}
GPGX_EX const char* gpgx_get_memdom(int which, void **area, int *size)
{
if (!area || !size)
return NULL;
switch (which)
{
case 0:
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
*area = work_ram;
*size = 0x10000;
return "68K RAM";
}
else if (system_hw == SYSTEM_SG)
{
*area = work_ram;
*size = 0x400;
return "Main RAM";
}
else if (system_hw == SYSTEM_SGII)
{
*area = work_ram;
*size = 0x800;
return "Main RAM";
}
else
{
*area = work_ram;
*size = 0x2000;
return "Main RAM";
}
case 1:
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
*area = zram;
*size = 0x2000;
return "Z80 RAM";
}
else return NULL;
case 2:
if (!cdd.loaded)
{
*area = ext.md_cart.rom;
*size = ext.md_cart.romsize;
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
return "MD CART";
}
else
{
return "ROM";
}
}
else if (scd.cartridge.id)
{
*area = scd.cartridge.area;
*size = scd.cartridge.mask + 1;
return "EBRAM";
}
else return NULL;
case 3:
if (cdd.loaded)
{
*area = scd.bootrom;
*size = 0x20000;
return "CD BOOT ROM";
}
else return NULL;
case 4:
if (cdd.loaded)
{
*area = scd.prg_ram;
*size = 0x80000;
return "CD PRG RAM";
}
else return NULL;
case 5:
if (cdd.loaded)
{
*area = scd.word_ram[0];
*size = 0x20000;
return "CD WORD RAM[0] (1M)";
}
else return NULL;
case 6:
if (cdd.loaded)
{
*area = scd.word_ram[1];
*size = 0x20000;
return "CD WORD RAM[1] (1M)";
}
else return NULL;
case 7:
if (cdd.loaded)
{
*area = scd.word_ram_2M;
*size = 0x40000;
return "CD WORD RAM (2M)";
}
else return NULL;
case 8:
if (cdd.loaded)
{
*area = scd.bram;
*size = 0x2000;
return "CD BRAM";
}
else return NULL;
case 9:
if (system_bios & SYSTEM_MD)
{
*area = boot_rom;
*size = 0x800;
return "MD BOOT ROM";
}
else if (system_bios & (SYSTEM_SMS | SYSTEM_GG))
{
*area = &ext.md_cart.rom[0x400000];
*size = sms_cart_bootrom_size();
return "BOOT ROM";
}
else return NULL;
case 10:
// these should be mutually exclusive
if (sram.on)
{
*area = sram.sram;
*size = saveramsize();
// Codemasters mapper SRAM is only used by 1 game
// and that 1 game does not actually have a battery
// (this also mimics SMSHawk's behavior)
if (sms_cart_is_codies())
{
return "Cart (Volatile) RAM";
}
return "SRAM";
}
else if ((system_hw & SYSTEM_PBC) != SYSTEM_MD)
{
*area = &work_ram[0x2000];
*size = sms_cart_ram_size();
return "Cart (Volatile) RAM";
}
else return NULL;
case 11:
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
// MD has more CRAM
*size = 0x80;
}
else
{
*size = 0x40;
}
*area = cram;
return "CRAM";
case 12:
*area = vsram;
*size = 128;
return "VSRAM";
case 13:
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
// MD has more VRAM
*size = 0x10000;
}
else
{
*size = 0x4000;
}
*area = vram;
return "VRAM";
default:
return NULL;
}
}
GPGX_EX void gpgx_write_z80_bus(unsigned addr, unsigned data)
{
// note: this is not valid for MD
z80_writemap[addr >> 10][addr & 0x3FF] = data;
}
GPGX_EX void gpgx_write_m68k_bus(unsigned addr, unsigned data)
{
cpu_memory_map m = m68k.memory_map[addr >> 16 & 0xff];
if (m.base && !m.write8)
m.base[(addr & 0xffff) ^ 1] = data;
}
GPGX_EX void gpgx_write_s68k_bus(unsigned addr, unsigned data)
{
cpu_memory_map m = s68k.memory_map[addr >> 16 & 0xff];
if (m.base && !m.write8)
m.base[(addr & 0xffff) ^ 1] = data;
}
GPGX_EX unsigned gpgx_peek_z80_bus(unsigned addr)
{
// note: this is not valid for MD
return z80_readmap[addr >> 10][addr & 0x3FF];
}
GPGX_EX unsigned gpgx_peek_m68k_bus(unsigned addr)
{
cpu_memory_map m = m68k.memory_map[addr >> 16 & 0xff];
if (m.base && !m.read8)
return m.base[(addr & 0xffff) ^ 1];
else
return 0xff;
}
GPGX_EX unsigned gpgx_peek_s68k_bus(unsigned addr)
{
cpu_memory_map m = s68k.memory_map[addr >> 16 & 0xff];
if (m.base && !m.read8)
return m.base[(addr & 0xffff) ^ 1];
else
return 0xff;
}
enum SMSFMSoundChipType
{
YM2413_DISABLED,
YM2413_MAME,
YM2413_NUKED
};
enum GenesisFMSoundChipType
{
MAME_YM2612,
MAME_ASIC_YM3438,
MAME_Enhanced_YM3438,
Nuked_YM2612,
Nuked_YM3438
};
struct InitSettings
{
uint32_t BackdropColor;
int32_t Region;
int32_t ForceVDP;
uint16_t LowPassRange;
int16_t LowFreq;
int16_t HighFreq;
int16_t LowGain;
int16_t MidGain;
int16_t HighGain;
uint8_t Filter;
uint8_t InputSystemA;
uint8_t InputSystemB;
uint8_t SixButton;
uint8_t ForceSram;
uint8_t SMSFMSoundChip;
uint8_t GenesisFMSoundChip;
uint8_t SpritesAlwaysOnTop;
uint8_t LoadBios;
uint8_t Overscan;
uint8_t GGExtra;
};
#ifdef HOOK_CPU
#ifdef USE_BIZHAWK_CALLBACKS
void CDLog68k(uint addr, uint flags)
{
addr &= 0x00FFFFFF;
//check for sram region first
if(sram.on)
{
if(addr >= sram.start && addr <= sram.end)
{
biz_cdcb(addr - sram.start, eCDLog_AddrType_SRAM, flags);
return;
}
}
if(addr < 0x400000)
{
uint block64k_rom;
//apply memory map to process rom address
unsigned char* block64k = m68k.memory_map[((addr)>>16)&0xff].base;
//outside the ROM range. complex mapping logic/accessories; not sure how to handle any of this
if(block64k < cart.rom || block64k >= cart.rom + cart.romsize)
return;
block64k_rom = block64k - cart.rom;
addr = ((addr) & 0xffff) + block64k_rom;
//outside the ROM range somehow
if(addr >= cart.romsize)
return;
biz_cdcb(addr, eCDLog_AddrType_MDCART, flags);
return;
}
if(addr > 0xFF0000)
{
//no memory map needed
biz_cdcb(addr & 0xFFFF, eCDLog_AddrType_RAM68k, flags);
return;
}
}
void bk_cpu_hook(hook_type_t type, int width, unsigned int address, unsigned int value)
{
switch (type)
{
case HOOK_M68K_E:
{
if (biz_execcb)
biz_execcb(address);
if (biz_cdcb)
{
CDLog68k(address, eCDLog_Flags_Exec68k);
CDLog68k(address + 1, eCDLog_Flags_Exec68k);
}
break;
}
case HOOK_M68K_R:
{
if (biz_readcb)
biz_readcb(address);
break;
}
case HOOK_M68K_W:
{
if (biz_writecb)
biz_writecb(address);
break;
}
default: break;
}
}
#endif // USE_BIZHAWK_CALLBACKS
#endif // HOOK_CPU
GPGX_EX int gpgx_init(const char* feromextension,
ECL_ENTRY int (*feload_archive_cb)(const char *filename, unsigned char *buffer, int maxsize),
struct InitSettings *settings)
{
fprintf(stderr, "Initializing GPGX native...\n");
cinterface_force_sram = settings->ForceSram;
memset(&bitmap, 0, sizeof(bitmap));
strncpy(romextension, feromextension, 3);
romextension[3] = 0;
load_archive_cb = feload_archive_cb;
bitmap.width = 1024;
bitmap.height = 512;
bitmap.pitch = 1024 * 4;
bitmap.data = alloc_invisible(2 * 1024 * 1024);
tempsram = alloc_invisible(0x100000 + 0x2000);
// Initializing ram deepfreeze list
#ifdef USE_RAM_DEEPFREEZE
deepfreeze_list_size = 0;
#endif
/* sound options */
config.psg_preamp = 150;
config.fm_preamp = 100;
config.cdda_volume = 100;
config.pcm_volume = 100;
config.hq_fm = 1;
config.hq_psg = 1;
config.filter = settings->Filter; //0; /* no filter */
config.lp_range = settings->LowPassRange; //0x9999; /* 0.6 in 16.16 fixed point */
config.low_freq = settings->LowFreq; //880;
config.high_freq = settings->HighFreq; //5000;
config.lg = settings->LowGain; //100;
config.mg = settings->MidGain; //100;
config.hg = settings->HighGain; //100;
config.mono = 0;
config.ym3438 = 0;
// Selecting FM Sound chip to use for SMS / GG emulation. Using a default for now, until we also
// accept this core for SMS/GG emulation in BizHawk
switch (settings->SMSFMSoundChip)
{
case YM2413_DISABLED:
config.opll = 0;
config.ym2413 = 0;
break;
case YM2413_MAME:
config.opll = 0;
config.ym2413 = 1;
break;
case YM2413_NUKED:
config.opll = 1;
config.ym2413 = 1;
break;
}
// Selecting FM Sound chip to use for Genesis / Megadrive / CD emulation
switch (settings->GenesisFMSoundChip)
{
case MAME_YM2612:
config.ym2612 = YM2612_DISCRETE;
YM2612Config(YM2612_DISCRETE);
break;
case MAME_ASIC_YM3438:
config.ym2612 = YM2612_INTEGRATED;
YM2612Config(YM2612_INTEGRATED);
break;
case MAME_Enhanced_YM3438:
config.ym2612 = YM2612_ENHANCED;
YM2612Config(YM2612_ENHANCED);
break;
case Nuked_YM2612:
OPN2_SetChipType(ym3438_mode_ym2612);
config.ym3438 = 1;
break;
case Nuked_YM3438:
OPN2_SetChipType(ym3438_mode_readmode);
config.ym3438 = 2;
break;
}
/* system options */
config.system = 0; /* = AUTO (or SYSTEM_SG, SYSTEM_SGII, SYSTEM_SGII_RAM_EXT, SYSTEM_MARKIII, SYSTEM_SMS, SYSTEM_SMS2, SYSTEM_GG, SYSTEM_MD) */
config.region_detect = settings->Region; /* 0 = AUTO, 1 = USA, 2 = EUROPE, 3 = JAPAN/NTSC, 4 = JAPAN/PAL */
config.vdp_mode = settings->ForceVDP; /* 0 = AUTO, 1 = NTSC, 2 = PAL */
config.master_clock = 0; /* = AUTO (1 = NTSC, 2 = PAL) */
config.force_dtack = 0;
config.addr_error = 1;
config.bios = settings->LoadBios ? 3 : 0; /* Load BIOS and do NOT unload cartridge (bit 0: load bios, bit 1: keep cartridge loaded) */
config.lock_on = 0; /* = OFF (or TYPE_SK, TYPE_GG & TYPE_AR) */
config.add_on = 0; /* = HW_ADDON_AUTO (or HW_ADDON_MEGACD, HW_ADDON_MEGASD & HW_ADDON_ONE) */
config.cd_latency = 1;
/* display options */
config.overscan = settings->Overscan; /* 3 = all borders (0 = no borders , 1 = vertical borders only, 2 = horizontal borders only) */
config.gg_extra = settings->GGExtra; /* 1 = show extended Game Gear screen (256x192) */
config.render = 1; /* 1 = double resolution output (only when interlaced mode 2 is enabled) */
config.ntsc = 0;
config.lcd = 0; /* 0.8 fixed point */
config.enhanced_vscroll = 0;
config.enhanced_vscroll_limit = 8;
config.sprites_always_on_top = settings->SpritesAlwaysOnTop;
// set overall input system type
// usual is MD GAMEPAD or NONE
// TEAMPLAYER, WAYPLAY, ACTIVATOR, XEA1P, MOUSE need to be specified
// everything else is auto or master system only
// XEA1P is port 1 only
// WAYPLAY is both ports at same time only
input.system[0] = settings->InputSystemA;
input.system[1] = settings->InputSystemB;
cinterface_custom_backdrop_color = settings->BackdropColor;
// Default: Genesis
// apparently, the only part of config.input used is the padtype identifier,
// and that's used only for choosing pad type when system_md
for (int i = 0; i < MAX_INPUTS; i++)
config.input[i].padtype = settings->SixButton ? DEVICE_PAD6B : DEVICE_PAD3B;
// Hacky but effective. Setting the correct controller type here if this is sms or GG
// note that we can't use system_hw yet, that's set in load_rom
if (memcmp("GEN", &romextension[0], 3) != 0)
{
for (int i = 0; i < MAX_INPUTS; i++)
config.input[i].padtype = DEVICE_PAD2B;
}
else
{
// gpgx won't load the genesis bootrom itself, we have to do that manually
if (config.bios & 1)
{
// not fatal if this fails (unless we're recording a movie, which we handle elsewhere)
if (load_archive(MD_BIOS, boot_rom, sizeof(boot_rom), NULL) != 0)
{
#ifdef LSB_FIRST
// gpgx also expects us to byteswap the boot rom
for (int i = 0; i < sizeof(boot_rom); i += 2)
{
uint8 temp = boot_rom[i];
boot_rom[i] = boot_rom[i+1];
boot_rom[i+1] = temp;
}
#endif
system_bios |= SYSTEM_MD;
}
}
}
// first try to load our main CD
if (!load_rom("PRIMARY_CD"))
{
// otherwise, try to load our ROM
if (!load_rom("PRIMARY_ROM"))
{
return 0;
}
}
audio_init(44100, 0);
system_init();
system_reset();
update_viewport();
gpgx_clear_sram();
load_archive_cb = NULL; // don't hold onto load_archive_cb for longer than we need it for
return 1;
}
#ifdef USE_RAM_DEEPFREEZE
GPGX_EX int gpgx_add_deepfreeze_list_entry(const int address, const uint8_t value)
{
// Prevent overflowing
if (deepfreeze_list_size == MAX_DEEP_FREEZE_ENTRIES) return -1;
deepfreeze_list[deepfreeze_list_size].address = address;
deepfreeze_list[deepfreeze_list_size].value = value;
deepfreeze_list_size++;
return 0;
}
GPGX_EX void gpgx_clear_deepfreeze_list()
{
deepfreeze_list_size = 0;
}
#endif
GPGX_EX void gpgx_reset(int hard)
{
if (hard)
system_reset();
else
gen_reset(0);
}
GPGX_EX void gpgx_set_mem_callback(ECL_ENTRY void (*read)(unsigned), ECL_ENTRY void (*write)(unsigned), ECL_ENTRY void (*exec)(unsigned))
{
biz_readcb = read;
biz_writecb = write;
biz_execcb = exec;
set_cpu_hook((biz_readcb || biz_writecb || biz_execcb || biz_cdcb) ? bk_cpu_hook : NULL);
}
GPGX_EX void gpgx_set_cd_callback(CDCallback cdcallback)
{
biz_cdcb = cdcallback;
set_cpu_hook((biz_readcb || biz_writecb || biz_execcb || biz_cdcb) ? bk_cpu_hook : NULL);
}
GPGX_EX void gpgx_set_draw_mask(int mask)
{
cinterface_render_bga = !!(mask & 1);
cinterface_render_bgb = !!(mask & 2);
cinterface_render_bgw = !!(mask & 4);
cinterface_render_obj = !!(mask & 8);
cinterface_custom_backdrop = !!(mask & 16);
if (reg[1] & 0x04)
{
if (cinterface_custom_backdrop)
color_update_m5(0, 0);
else
color_update_m5(0x00, *(uint16 *)&cram[border << 1]);
}
}
GPGX_EX void gpgx_set_sprite_limit_enabled(int enabled)
{
config.no_sprite_limit = !enabled;
}
GPGX_EX void gpgx_invalidate_pattern_cache(void)
{
bg_list_index = (reg[1] & 0x04) ? 0x800 : 0x200;
for (int i = 0; i < bg_list_index; i++)
{
bg_name_list[i] = i;
bg_name_dirty[i] = 0xFF;
}
}
typedef struct
{
unsigned int value;
const char *name;
} gpregister_t;
GPGX_EX int gpgx_getmaxnumregs(void)
{
return 57;
}
GPGX_EX int gpgx_getregs(gpregister_t *regs)
{
int ret = 0;
// 22
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
#define MAKEREG(x) regs->name = "M68K " #x; regs->value = m68k_get_reg(M68K_REG_##x); regs++; ret++;
MAKEREG(A0);
MAKEREG(A1);
MAKEREG(A2);
MAKEREG(A3);
MAKEREG(A4);
MAKEREG(A5);
MAKEREG(A6);
MAKEREG(A7);
MAKEREG(D0);
MAKEREG(D1);
MAKEREG(D2);
MAKEREG(D3);
MAKEREG(D4);
MAKEREG(D5);
MAKEREG(D6);
MAKEREG(D7);
MAKEREG(PC);
MAKEREG(SR);
MAKEREG(SP);
MAKEREG(USP);
MAKEREG(ISP);
MAKEREG(IR);
#undef MAKEREG
}
// 13
#define MAKEREG(x) regs->name = "Z80 " #x; regs->value = Z80.x.d; regs++; ret++;
MAKEREG(pc);
MAKEREG(sp);
MAKEREG(af);
MAKEREG(bc);
MAKEREG(de);
MAKEREG(hl);
MAKEREG(ix);
MAKEREG(iy);
MAKEREG(wz);
MAKEREG(af2);
MAKEREG(bc2);
MAKEREG(de2);
MAKEREG(hl2);
#undef MAKEREG
// 22
if (system_hw == SYSTEM_MCD)
{
#define MAKEREG(x) regs->name = "S68K " #x; regs->value = s68k_get_reg(M68K_REG_##x); regs++; ret++;
MAKEREG(A0);
MAKEREG(A1);
MAKEREG(A2);
MAKEREG(A3);
MAKEREG(A4);
MAKEREG(A5);
MAKEREG(A6);
MAKEREG(A7);
MAKEREG(D0);
MAKEREG(D1);
MAKEREG(D2);
MAKEREG(D3);
MAKEREG(D4);
MAKEREG(D5);
MAKEREG(D6);
MAKEREG(D7);
MAKEREG(PC);
MAKEREG(SR);
MAKEREG(SP);
MAKEREG(USP);
MAKEREG(ISP);
MAKEREG(IR);
#undef MAKEREG
}
return ret;
}
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