[NES] add board: sunsoft-4 (mapper 068)
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zeromus
parent
8247fca267
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@ -91,6 +91,7 @@
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<SubType>Code</SubType>
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</Compile>
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<Compile Include="Consoles\Nintendo\NES\Boards\Sunsoft1.cs" />
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<Compile Include="Consoles\Nintendo\NES\Boards\Sunsoft4.cs" />
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<Compile Include="Consoles\Nintendo\NES\Boards\SxROM.cs">
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<SubType>Code</SubType>
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</Compile>
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@ -100,7 +100,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
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}
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}
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int ApplyMirroring(int addr)
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protected int ApplyMirroring(int addr)
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{
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int block = (addr >> 10) & 3;
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block = mirroring[block];
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@ -0,0 +1,125 @@
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using System;
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using System.IO;
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using System.Diagnostics;
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namespace BizHawk.Emulation.Consoles.Nintendo
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{
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//AKA mapper 068
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//After Burner 2
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//Maharaja
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class Sunsoft4 : NES.NESBoardBase
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{
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//configuration
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int prg_bank_mask, chr_bank_mask, nt_bank_mask;
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//state
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ByteBuffer chr_regs_2k = new ByteBuffer(4);
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ByteBuffer nt_regs = new ByteBuffer(2);
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ByteBuffer prg_regs_16k = new ByteBuffer(2);
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bool flag_m, flag_r;
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public override void Dispose()
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{
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base.Dispose();
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chr_regs_2k.Dispose();
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nt_regs.Dispose();
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prg_regs_16k.Dispose();
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}
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public override bool Configure(NES.EDetectionOrigin origin)
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{
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//configure
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switch (Cart.board_type)
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{
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case "SUNSOFT-4":
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AssertPrg(128); AssertChr(128,256); AssertVram(0); AssertWram(8);
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break;
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default:
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return false;
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}
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SetMirrorType(EMirrorType.Vertical);
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prg_regs_16k[1] = 0xFF;
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prg_bank_mask = Cart.prg_size / 16 - 1;
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chr_bank_mask = Cart.chr_size / 2 - 1;
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nt_bank_mask = Cart.chr_size - 1;
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return true;
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}
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public override byte ReadPRG(int addr)
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{
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int bank_16k = addr >> 14;
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int ofs = addr & ((1 << 14) - 1);
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bank_16k = prg_regs_16k[bank_16k];
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bank_16k &= prg_bank_mask;
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addr = (bank_16k << 14) | ofs;
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return ROM[addr];
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}
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public override byte ReadPPU(int addr)
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{
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if (addr < 0x2000)
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{
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//chr comes from normal chr mapping
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int bank_2k = addr >> 11;
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int ofs = addr & ((1 << 11) - 1);
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bank_2k = chr_regs_2k[bank_2k];
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bank_2k &= chr_bank_mask;
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addr = (bank_2k << 11) | ofs;
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return VROM[addr];
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}
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else
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{
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//nametable may come from "NT-ROM"
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//which means from extra CHR data starting at bank 0x80
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if (flag_r)
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{
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addr = ApplyMirroring(addr);
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int bank_1k = (addr >> 10) & 3;
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int ofs = addr & ((1 << 10) - 1);
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bank_1k = nt_regs[bank_1k] + 0x80;
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bank_1k &= nt_bank_mask;
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addr = (bank_1k << 10) | ofs;
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return VROM[addr];
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}
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else return base.ReadPPU(addr);
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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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switch (addr & 0xF000)
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{
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case 0x0000: //$8000
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chr_regs_2k[0] = value;
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break;
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case 0x1000: //$9000
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chr_regs_2k[1] = value;
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break;
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case 0x2000: //$A000
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chr_regs_2k[2] = value;
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break;
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case 0x3000: //$B000
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chr_regs_2k[3] = value;
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break;
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case 0x4000: //$C000
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nt_regs[0] = (byte)(value & 0x7F);
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break;
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case 0x5000: //$D000
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nt_regs[1] = (byte)(value & 0x7F);
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break;
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case 0x6000: //$E000
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flag_m = (value & 1) != 0;
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flag_r = ((value >> 4) & 1) != 0;
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if (flag_m) SetMirrorType(EMirrorType.Horizontal);
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else SetMirrorType(EMirrorType.Vertical);
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break;
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case 0x7000: //$F000
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prg_regs_16k[0] = value;
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break;
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}
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}
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}
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}
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@ -91,6 +91,7 @@ static string ClassifyTable = @"
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13 32 0 8 16 NES-CPROM; videomation
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66 64 16 8 0 NES-MHROM; super mario bros / duck hunt
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66 128 32 8 0 NES-GNROM; gumshoe
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68 128 256 8 0 SUNSOFT-4; After Burner 2 (J)
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";
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}
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@ -2263,6 +2263,7 @@ D4448D09BBFDE687C04F9E3310E023AB ti83_1.rom TI83 initPC=6ce
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;--nes--;
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;these games seem to be in goodNES but not bootgod's DB
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sha1:22E6986903141495BA4589AC65982F3FB4D0E37B Adventures of Lolo (U) NES board=NES-SEROM;PRG=32;CHR=32
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sha1:99C18C91F051BFBA6836A7B6B213C77569D83767 After Burner 2 (J) NES board=SUNSOFT-4;PRG=128;CHR=256;WRAM=8
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sha1:CF655333DCE649A3C7060E9989860F2FC74E473A Demon Sword (U) NES board=NES-SL1ROM;PRG=128;CHR=128
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sha1:7786BA1FE8E7E9E542EEB13CF2A6E2A1AD7F696D Metal Gear (U) NES board=KONAMI-UNROM;PRG=128
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sha1:894F20405286F5F75133CE4648300E2C67972B40 Solomon's Key (U) NES board=NES-CNROM;PRG=32;CHR=32
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