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nes-fix BANDAI-FCG-1 bugs

This commit is contained in:
zeromus 2011-09-18 19:29:53 +00:00
parent a827bb7838
commit bd77e95bfd
1 changed files with 40 additions and 20 deletions
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60
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/BANDAI-FCG-1.cs
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@ -29,12 +29,12 @@ namespace BizHawk.Emulation.Consoles.Nintendo
class BANDAI_FCG_1 : NES.NESBoardBase
{
//configuration
int prg_bank_mask_8k, chr_bank_mask_1k;
int prg_bank_mask_16k, chr_bank_mask_1k;
//state
byte prg_bank_8k, eprom;
ByteBuffer regs = new ByteBuffer(10);
ByteBuffer prg_banks_8k = new ByteBuffer(2);
byte prg_bank_16k, eprom;
ByteBuffer regs = new ByteBuffer(8);
ByteBuffer prg_banks_16k = new ByteBuffer(2);
bool irq_countdown, irq_enabled, irq_asserted;
ushort irq_counter;
int clock_counter;
@ -54,7 +54,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
{
base.Dispose();
regs.Dispose();
prg_banks_8k.Dispose();
prg_banks_16k.Dispose();
}
public override bool Configure(NES.EDetectionOrigin origin)
@ -74,27 +74,34 @@ namespace BizHawk.Emulation.Consoles.Nintendo
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;
prg_bank_mask_16k = (Cart.prg_size / 16) - 1;
SetMirrorType(EMirrorType.Vertical);
prg_banks_16k[0] = 0x00;
prg_banks_16k[1] = 0xFF;
}
void SyncPRG()
{
prg_banks_8k[0] = regs[8];
prg_banks_16k[0] = prg_bank_16k;
}
public override void WritePRG(int addr, byte value)
void WriteReg(int reg, byte value)
{
addr &= 0xC000;
switch (addr)
switch (reg)
{
case 0: case 1: case 2: case 3:
case 4: case 5: case 6: case 7:
regs[addr] = value;
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
regs[reg] = value;
break;
case 8:
regs[8] = value;
NES.LogLine("mapping PRG {0}", value);
prg_bank_16k = value;
SyncPRG();
break;
case 9:
@ -125,6 +132,19 @@ namespace BizHawk.Emulation.Consoles.Nintendo
}
}
public override void WriteWRAM(int addr, byte value)
{
NES.LogLine("writewram {0:X4} = {1:X2}", addr, value);
addr &= 0xF;
WriteReg(addr, value);
}
public override void WritePRG(int addr, byte value)
{
NES.LogLine("writeprg {0:X4} = {1:X2}", addr, value);
addr &= 0xF;
WriteReg(addr, value);
}
void SyncIrq()
{
NES.irq_cart = irq_asserted;
@ -153,11 +173,11 @@ namespace BizHawk.Emulation.Consoles.Nintendo
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;
int bank_16k = addr >> 14;
int ofs = addr & ((1 << 14) - 1);
bank_16k = prg_banks_16k[bank_16k];
bank_16k &= prg_bank_mask_16k;
addr = (bank_16k << 14) | ofs;
return ROM[addr];
}