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Support the UNIF_UNL-T-230 board (a vrc pirate cart)

This commit is contained in:
adelikat 2016-09-16 18:20:29 -04:00
parent adcf2dc375
commit c6db32437c
1 changed files with 22 additions and 4 deletions
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26
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/VRC2_4.cs
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@ -82,6 +82,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
public int extra_vrom;
int latch6k_value;
bool isPirate = false;
public override void Dispose()
{
base.Dispose();
@ -107,6 +109,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
SyncPRG();
SyncCHR();
SyncIRQ();
ser.Sync("isPirate", ref isPirate);
}
void SyncPRG()
@ -174,6 +177,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
remap = AddrA3A2_A1A0;
Cart.wram_size = 8;
break;
case "UNIF_UNL-T-230":
isPirate = true;
goto case "MAPPER023";
case "MAPPER027":
//not exactly the same implementation as FCEUX, but we're taking functionality from it step by step as we discover and document it
//world hero (unl) is m027 and depends on the extrabig_chr functionality to have correct graphics.
@ -266,12 +272,13 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
public override byte ReadPPU(int addr)
{
if (addr < 0x2000)
if (addr < 0x2000 && VROM != null)
{
int bank_1k = addr >> 10;
int ofs = addr & ((1 << 10) - 1);
bank_1k = chr_banks_1k[bank_1k];
addr = (bank_1k << 10) | ofs;
return VROM[addr + extra_vrom];
}
else return base.ReadPPU(addr);
@ -296,8 +303,11 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
case 0x0001:
case 0x0002:
case 0x0003:
prg_bank_reg_8k[0] = value & prg_reg_mask_8k;
SyncPRG();
if (!isPirate)
{
prg_bank_reg_8k[0] = value & prg_reg_mask_8k;
SyncPRG();
}
break;
case 0x1000: //$9000
@ -322,7 +332,15 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
case 0x2001: //$A001
case 0x2002: //$A002
case 0x2003: //$A003
prg_bank_reg_8k[1] = value & prg_reg_mask_8k;
if (!isPirate)
{
prg_bank_reg_8k[1] = value & prg_reg_mask_8k;
}
else
{
prg_bank_reg_8k[0] = (value & 0x1F) << 1;
prg_bank_reg_8k[1] = ((value & 0x1F) << 1) | 1;
}
SyncPRG();
break;