NES: rework bandai FCG a bit, to add support for some iNES identified roms (mapper 16, 159). JUMP-2 (aka mapper 153) is not supported, but will be eventually. Datach daughterboard games (aka mapper 157) are poorly documented and dumped, so can't do anything there now.
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goyuken
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6176b722e9
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@ -2,26 +2,31 @@
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namespace BizHawk.Emulation.Cores.Nintendo.NES
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{
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//AKA mapper 16 & 159
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/*
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Example Games:
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--------------------------
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Dragon Ball - Dai Maou Jukkatsu (016) Works
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Dragon Ball Z Gaiden (016) Works
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Dragon Ball Z 2 (016) Works
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Rokudenashi Blues (016) Works
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Akuma-kun - Makai no Wana (016) Works
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Dragon Ball Z - Kyoushuu! Saiya Jin (159) Works
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SD Gundam Gaiden (159) Works
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Magical Taruruuto Kun 1, 2 (159) Works
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I'm breaking FCG boards into 7 main types:
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PRG_ROM: 128KB
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PRG_RAM: None
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CHR-ROM: 128KB
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CHR_RAM: None
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No Batter
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Mapper controlled mirroring
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No CIC present
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[1] FCG-1, FCG-2: regs at 6000:7fff.
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FCG-3: regs at 8000:ffff. one of the following at 6000:7fff:
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[2] nothing
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[3] seeprom (1kbit)
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[4] seeprom (2kbit)
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[5] sram (8kbyte) (SEE SIZE NOTES BELOW)
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[6] Datach Joint ROM System: daughterboard setup (DON'T KNOW MUCH ABOUT THIS)
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[7] Non-existant zombie board: regs are at 6000:ffff and 2kbit seeprom is present
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iNES #16 refers to [7], which ends up working correctly for most [1], [2], or [4] games.
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iNES #153 refers to [5], theoretically.
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iNES #157 refers to [6], theoretically.
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iNES #159 refers to [3], theoretically.
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We try to emulate everything but [5] and [6] here.
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Size notes:
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chr regs are 8 bit wide and swap 1K at a time, for a max size of 256K chr, always rom.
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prg reg is 4 bit wide and swaps 16K at a time, for a max size of 256K prg.
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[5] is a special case; it has 8K of vram and uses some of the chr banking lines to handle 512K of prgrom.
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I have no idea what [6] does.
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Every real instance of [1], [2], [3], [4] had 128K or 256K of each of chr and prg.
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*/
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public sealed class BANDAI_FCG_1 : NES.NESBoardBase
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@ -29,6 +34,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
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//configuration
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int prg_bank_mask_16k, chr_bank_mask_1k;
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bool regs_prg_enable;
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bool regs_wram_enable;
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//regenerable state
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IntBuffer prg_banks_16k = new IntBuffer(2);
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@ -62,26 +70,46 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
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{
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switch (Cart.board_type)
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{
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case "BANDAI-FCG-1": // no eprom
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case "BANDAI-FCG-2": // no eprom
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AssertPrg(128, 256, 512); AssertChr(128, 256); AssertWram(0); AssertVram(0);
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// see notes above that explain some of this in more detail
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case "BANDAI-FCG-1": // [1]
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case "BANDAI-FCG-2": // [1]
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case "IREM-FCG-1": // [1] (the extra glue logic is to connect the two chr roms, and doesn't affect emulation)
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AssertPrg(128, 256); AssertChr(128, 256); AssertWram(0); AssertVram(0);
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regs_prg_enable = false;
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regs_wram_enable = true;
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break;
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case "BANDAI-LZ93D50+24C01": // 1kbit eprom
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case "BANDAI-LZ93D50": // [2]
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AssertPrg(128, 256); AssertChr(128, 256); AssertWram(0); AssertVram(0);
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regs_prg_enable = true;
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regs_wram_enable = false;
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break;
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case "BANDAI-LZ93D50+24C01": // [3]
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AssertPrg(128, 256); AssertChr(128, 256); AssertWram(0); AssertVram(0);
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eprom = new SEEPROM(false);
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regs_prg_enable = true;
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regs_wram_enable = false;
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break;
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case "BANDAI-LZ93D50+24C02": // 2kbit eprom
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case "MAPPER159": // [3]
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AssertPrg(128, 256); AssertChr(128, 256);
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Cart.wram_size = 0;
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regs_prg_enable = true;
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regs_wram_enable = false;
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eprom = new SEEPROM(false);
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break;
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case "BANDAI-LZ93D50+24C02": // [4]
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AssertPrg(128, 256); AssertChr(128, 256); AssertWram(0); AssertVram(0);
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eprom = new SEEPROM(true);
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regs_prg_enable = true;
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regs_wram_enable = false;
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break;
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/* if implementing NES mappers, a way must be found to reliably determine which
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* eprom variety is in use
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case "MAPPER016": // TEST TEST
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case "MAPPER016": // [7]
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AssertPrg(128, 256); AssertChr(128, 256);
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Cart.wram_size = 0;
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Cart.vram_size = 0;
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eprom = new SEEPROM(false);
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regs_prg_enable = true;
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regs_wram_enable = true;
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eprom = new SEEPROM(true);
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break;
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*/
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default:
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return false;
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}
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@ -155,14 +183,20 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
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public override void WriteWRAM(int addr, byte value)
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{
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//NES.LogLine("writewram {0:X4} = {1:X2}", addr, value);
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addr &= 0xF;
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WriteReg(addr, value);
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if (regs_wram_enable)
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{
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addr &= 0xF;
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WriteReg(addr, value);
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}
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}
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public override void WritePRG(int addr, byte value)
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{
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//NES.LogLine("writeprg {0:X4} = {1:X2}", addr, value);
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addr &= 0xF;
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WriteReg(addr, value);
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if (regs_prg_enable)
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{
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addr &= 0xF;
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WriteReg(addr, value);
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}
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}
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public override byte ReadWRAM(int addr)
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