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NES - Some work on BANDAI-FCG-1 (mappers 16 & 159)

This commit is contained in:
andres.delikat 2011-09-18 16:14:55 +00:00
parent 586b352b37
commit 3c82e4f524
2 changed files with 76 additions and 42 deletions
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2
BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
View File

@ -26,7 +26,7 @@ Open bus and bus conflict emulation is not considered complete or thorough in an
011 Misc Complete
013 CPROM Complete
015 Multicart Junk
016 Bandai Nothing (+159)
016 Bandai Started doesn't work(+159)
018 Jaleco* Nothing
019 Namcot106 Needed (+210)
021 VRC4 Needed

116
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/BANDAI-FCG-1.cs
View File

@ -29,13 +29,33 @@ namespace BizHawk.Emulation.Consoles.Nintendo
class BANDAI_FCG_1 : NES.NESBoardBase
{
//configuration
int prg, chr_bank_mask_1k, mirror;
int prg_bank_mask_8k, chr_bank_mask_1k;
//state
byte prg_bank_8k, eprom;
ByteBuffer regs = new ByteBuffer(10);
ByteBuffer prg_banks_8k = new ByteBuffer(2);
bool irq_countdown, irq_enabled, irq_asserted;
ushort irq_counter;
int clock_counter;
int addr_reg;
ByteBuffer regs = new ByteBuffer(12);
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("chr_bank_mask_1k", ref chr_bank_mask_1k);
ser.Sync("irq_counter", ref irq_counter);
ser.Sync("irq_countdown", ref irq_countdown);
ser.Sync("irq_enabled", ref irq_enabled);
ser.Sync("irq_asserted", ref irq_asserted);
ser.Sync("clock_counter", ref clock_counter);
}
public override void Dispose()
{
base.Dispose();
regs.Dispose();
prg_banks_8k.Dispose();
}
public override bool Configure(NES.EDetectionOrigin origin)
{
@ -47,34 +67,38 @@ namespace BizHawk.Emulation.Consoles.Nintendo
default:
return false;
}
BaseConfigure();
return true;
}
protected void BaseConfigure()
{
chr_bank_mask_1k = Cart.chr_size - 1;
prg_bank_mask_8k = (Cart.prg_size / 8) - 1;
prg_banks_8k[1] = 0xFF;
SetMirrorType(EMirrorType.Vertical);
}
public override byte ReadPRG(int addr)
void SyncPRG()
{
return ROM[addr + (prg * 0x8000)];
prg_banks_8k[0] = regs[8];
}
public override void WritePRG(int addr, byte value)
{
addr &= 0xC000;
switch (addr)
{
case 0: case 1: case 2: case 3:
case 4: case 5: case 6: case 7:
regs[addr_reg] = value;
regs[addr] = value;
break;
case 8:
prg = value;
regs[8] = value;
SyncPRG();
break;
case 9:
mirror = value & 0x03;
switch (mirror)
switch (value & 3)
{
case 0: SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical); break;
case 1: SetMirrorType(NES.NESBoardBase.EMirrorType.Horizontal); break;
@ -84,6 +108,8 @@ namespace BizHawk.Emulation.Consoles.Nintendo
break;
case 0xA:
irq_enabled = value.Bit(0);
if (!irq_enabled) irq_asserted = false;
SyncIrq();
break;
case 0xB:
irq_counter &= 0xFF00;
@ -94,37 +120,16 @@ namespace BizHawk.Emulation.Consoles.Nintendo
irq_counter |= (ushort)(value << 8);
break;
case 0xD:
eprom = value;
break;
}
}
public override byte ReadPPU(int addr)
{
//return VRAM[addr + chr];
return base.ReadPPU(addr);
}
public override void WritePPU(int addr, byte value)
{
//VRAM[addr + chr] = value;
base.WritePPU(addr, value);
}
void SyncIrq()
{
NES.irq_cart = irq_asserted;
}
public override void ClockPPU()
{
clock_counter++;
if (clock_counter == 3)
{
ClockCPU();
clock_counter = 0;
}
}
void ClockCPU()
{
if (!irq_countdown) return;
@ -136,17 +141,46 @@ namespace BizHawk.Emulation.Consoles.Nintendo
}
}
public override void SyncState(Serializer ser)
public override void ClockPPU()
{
base.SyncState(ser);
ser.Sync("prg", ref prg);
ser.Sync("chr_bank_mask_1k", ref chr_bank_mask_1k);
ser.Sync("mirror", ref mirror);
ser.Sync("irq_counter", ref irq_counter);
ser.Sync("irq_countdown", ref irq_countdown);
ser.Sync("irq_enabled", ref irq_enabled);
ser.Sync("irq_asserted", ref irq_asserted);
ser.Sync("clock_counter", ref clock_counter);
clock_counter++;
if (clock_counter == 3)
{
ClockCPU();
clock_counter = 0;
}
}
public override byte ReadPRG(int addr)
{
int bank_8k = addr >> 13;
int ofs = addr & ((1 << 13) - 1);
bank_8k = prg_banks_8k[bank_8k];
bank_8k &= prg_bank_mask_8k;
addr = (prg_bank_8k << 13) | ofs;
return ROM[addr];
}
int CalcPPUAddress(int addr)
{
int bank_1k = addr >> 10;
int ofs = addr & ((1 << 10) - 1);
bank_1k = regs[bank_1k];
bank_1k &= chr_bank_mask_1k;
return (bank_1k << 10) | ofs;
}
public override byte ReadPPU(int addr)
{
if (addr < 0x2000)
return VROM[CalcPPUAddress(addr)];
else return base.ReadPPU(addr);
}
public override void WritePPU(int addr, byte value)
{
if (addr < 0x2000) { }
base.WritePPU(addr, value);
}
}
}