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https://github.com/libretro/bsnes-libretro.git
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Basic HUC3 support
This commit is contained in:
Lior Halphon
parent
3fc4fcc538
commit
11f8c41305
@ -1143,7 +1143,14 @@ static bool mbc(GB_gameboy_t *gb, char *arguments, const debugger_command_t *com
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}
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if (cartridge->mbc_type) {
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GB_log(gb, "MBC%d\n", cartridge->mbc_type);
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static const char * const mapper_names[] = {
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[GB_MBC1] = "MBC1",
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[GB_MBC2] = "MBC2",
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[GB_MBC3] = "MBC3",
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[GB_MBC5] = "MBC5",
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[GB_HUC3] = "HUC3",
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};
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GB_log(gb, "%s\n", mapper_names[cartridge->mbc_type]);
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GB_log(gb, "Current mapped ROM bank: %x\n", gb->mbc_rom_bank);
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if (cartridge->has_ram) {
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GB_log(gb, "Current mapped RAM bank: %x\n", gb->mbc_ram_bank);
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@ -168,13 +168,13 @@ typedef struct {
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GB_MBC1,
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GB_MBC2,
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GB_MBC3,
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GB_MBC4, // Does this exist???
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GB_MBC5,
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GB_HUC3,
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} mbc_type;
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enum {
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GB_STANDARD_MBC,
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GB_HUC1, /* Todo: HUC1 features are not emulated. Should be unified with the CGB IR sensor API. */
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GB_CAMERA, /* Not emulated as well */
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GB_CAMERA,
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} mbc_subtype;
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bool has_ram;
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bool has_battery;
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@ -283,6 +283,11 @@ typedef struct GB_gameboy_s {
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uint8_t rom_bank_high:1;
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uint8_t ram_bank:4;
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} mbc5;
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struct {
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uint8_t rom_bank;
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uint8_t ram_bank;
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} huc3;
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};
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uint16_t mbc_rom0_bank; /* For some MBC1 wirings. */
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bool camera_registers_mapped;
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27
Core/mbc.c
27
Core/mbc.c
@ -6,7 +6,7 @@
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const GB_cartridge_t GB_cart_defs[256] = {
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// From http://gbdev.gg8.se/wiki/articles/The_Cartridge_Header#0147_-_Cartridge_Type
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/* MBC SUBTYPE RAM BAT. RTC RUMB. EXTRA */
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{ GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false, }, // 00h ROM ONLY
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{ GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // 00h ROM ONLY
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{ GB_MBC1 , GB_STANDARD_MBC, false, false, false, false}, // 01h MBC1
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{ GB_MBC1 , GB_STANDARD_MBC, true , false, false, false}, // 02h MBC1+RAM
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{ GB_MBC1 , GB_STANDARD_MBC, true , true , false, false}, // 03h MBC1+RAM+BATTERY
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@ -17,7 +17,7 @@ const GB_cartridge_t GB_cart_defs[256] = {
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{ GB_NO_MBC, GB_STANDARD_MBC, true , false, false, false}, // 08h ROM+RAM
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{ GB_NO_MBC, GB_STANDARD_MBC, true , true , false, false}, // 09h ROM+RAM+BATTERY
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[0xB] =
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// Todo: What are these?
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/* Todo: Not supported yet */
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{ GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // 0Bh MMM01
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{ GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // 0Ch MMM01+RAM
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{ GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // 0Dh MMM01+RAM+BATTERY
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@ -27,30 +27,25 @@ const GB_cartridge_t GB_cart_defs[256] = {
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{ GB_MBC3 , GB_STANDARD_MBC, false, false, false, false}, // 11h MBC3
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{ GB_MBC3 , GB_STANDARD_MBC, true , false, false, false}, // 12h MBC3+RAM
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{ GB_MBC3 , GB_STANDARD_MBC, true , true , false, false}, // 13h MBC3+RAM+BATTERY
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[0x15] =
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// Todo: Do these exist?
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{ GB_MBC4 , GB_STANDARD_MBC, false, false, false, false}, // 15h MBC4
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{ GB_MBC4 , GB_STANDARD_MBC, true , false, false, false}, // 16h MBC4+RAM
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{ GB_MBC4 , GB_STANDARD_MBC, true , true , false, false}, // 17h MBC4+RAM+BATTERY
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[0x19] =
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{ GB_MBC5 , GB_STANDARD_MBC, false, false, false, false}, // 19h MBC5
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{ GB_MBC5 , GB_STANDARD_MBC, true , false, false, false}, // 1Ah MBC5+RAM
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{ GB_MBC5 , GB_STANDARD_MBC, true , true , false, false}, // 1Bh MBC5+RAM+BATTERY
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/* Todo: Rumble supported yet */
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{ GB_MBC5 , GB_STANDARD_MBC, false, false, false, true }, // 1Ch MBC5+RUMBLE
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{ GB_MBC5 , GB_STANDARD_MBC, true , false, false, true }, // 1Dh MBC5+RUMBLE+RAM
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{ GB_MBC5 , GB_STANDARD_MBC, true , true , false, true }, // 1Eh MBC5+RUMBLE+RAM+BATTERY
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[0xFC] =
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// Todo: What are these?
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{ GB_MBC5 , GB_CAMERA , true, true, false, false}, // FCh POCKET CAMERA
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{ GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // FDh BANDAI TAMA5
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{ GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // FEh HuC3
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{ GB_MBC1 , GB_HUC1 , true , true , false, false}, // FFh HuC1+RAM+BATTERY
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{ GB_MBC5 , GB_CAMERA , true , true , false, false}, // FCh POCKET CAMERA
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{ GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // FDh BANDAI TAMA5 (Todo: Not supported)
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{ GB_HUC3 , GB_STANDARD_MBC, true , true , false, false}, // FEh HuC3 (Todo: Mapper support only)
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{ GB_MBC1 , GB_HUC1 , true , true , false, false}, // FFh HuC1+RAM+BATTERY (Todo: No IR bindings)
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};
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void GB_update_mbc_mappings(GB_gameboy_t *gb)
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{
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switch (gb->cartridge_type->mbc_type) {
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case GB_NO_MBC: case GB_MBC4: return;
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case GB_NO_MBC: return;
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case GB_MBC1:
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/* Todo: some obscure behaviors of MBC1 are not supported. See http://forums.nesdev.com/viewtopic.php?f=20&t=14099 */
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if (gb->mbc1.mode == 0) {
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@ -91,8 +86,12 @@ void GB_update_mbc_mappings(GB_gameboy_t *gb)
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gb->mbc_rom_bank = gb->mbc5.rom_bank_low | (gb->mbc5.rom_bank_high << 8);
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gb->mbc_ram_bank = gb->mbc5.ram_bank;
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break;
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case GB_HUC3:
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gb->mbc_rom_bank = gb->huc3.rom_bank;
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gb->mbc_ram_bank = gb->huc3.ram_bank;
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break;
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}
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if (gb->mbc_rom_bank == 0 && gb->cartridge_type->mbc_type != GB_MBC5) {
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if (gb->mbc_rom_bank == 0 && gb->cartridge_type->mbc_type != GB_MBC5 && gb->cartridge_type->mbc_type != GB_HUC3) {
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gb->mbc_rom_bank = 1;
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}
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}
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@ -280,7 +280,7 @@ uint8_t GB_read_memory(GB_gameboy_t *gb, uint16_t addr)
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static void write_mbc(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
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{
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switch (gb->cartridge_type->mbc_type) {
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case GB_NO_MBC: case GB_MBC4: return;
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case GB_NO_MBC: return;
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case GB_MBC1:
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switch (addr & 0xF000) {
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case 0x0000: case 0x1000: gb->mbc_ram_enable = (value & 0xF) == 0xA; break;
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@ -291,7 +291,7 @@ static void write_mbc(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
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break;
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case GB_MBC2:
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switch (addr & 0xF000) {
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case 0x0000: case 0x1000: if (!(addr & 0x100)) gb->mbc_ram_enable = value == 0xA; break;
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case 0x0000: case 0x1000: if (!(addr & 0x100)) gb->mbc_ram_enable = (value & 0xF) == 0xA; break;
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case 0x2000: case 0x3000: if ( addr & 0x100) gb->mbc2.rom_bank = value; break;
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}
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break;
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@ -319,6 +319,13 @@ static void write_mbc(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
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break;
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}
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break;
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case GB_HUC3:
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switch (addr & 0xF000) {
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case 0x0000: case 0x1000: gb->mbc_ram_enable = (value & 0xF) == 0xA; break;
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case 0x2000: case 0x3000: gb->huc3.rom_bank = value; break;
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case 0x4000: case 0x5000: gb->huc3.ram_bank = value; break;
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}
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break;
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}
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GB_update_mbc_mappings(gb);
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}
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