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nes-a bit of cleanup and add a compatibility note

This commit is contained in:
zeromus 2011-09-26 03:26:47 +00:00
parent dfb375d720
commit 17e0b48a2a
2 changed files with 25 additions and 21 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 Started doesn't work(+159)
016 Bandai Started doesn't work(+159) (probably needs eprom emulation)
018 Jaleco* Nothing
019 Namcot106 Decent (but no sound) (+210)
021 VRC4 Decent

44
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/BANDAI-FCG-1.cs
View File

@ -31,28 +31,33 @@ namespace BizHawk.Emulation.Consoles.Nintendo
//configuration
int prg_bank_mask_16k, chr_bank_mask_1k;
bool has_eprom = false;
//regenerable state
IntBuffer prg_banks_16k = new IntBuffer(2);
//state
byte prg_bank_16k, eprom;
int prg_reg_16k, eprom;
ByteBuffer regs = new ByteBuffer(8);
ByteBuffer prg_banks_16k = new ByteBuffer(2);
bool irq_countdown, irq_enabled, irq_asserted;
bool irq_enabled, irq_asserted;
ushort irq_counter;
int clock_counter;
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("chr_bank_mask_1k", ref chr_bank_mask_1k);
ser.Sync("prg_bank_mask_16k", ref prg_bank_mask_16k);
ser.Sync("prg_bank_mask_16k", ref prg_bank_mask_16k);
ser.Sync("prg_reg_16k", ref prg_reg_16k);
ser.Sync("regs", ref regs);
ser.Sync("eprom", ref eprom);
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);
ser.Sync("has_eprom", ref has_eprom);
if (ser.IsReader)
{
SyncPRG();
SyncIrq();
}
}
public override void Dispose()
@ -83,26 +88,27 @@ namespace BizHawk.Emulation.Consoles.Nintendo
}
if (Cart.mapper == 159)
has_eprom = true;
BaseConfigure();
return true;
}
protected void BaseConfigure()
{
chr_bank_mask_1k = Cart.chr_size - 1;
prg_bank_mask_16k = (Cart.prg_size / 16) - 1;
chr_bank_mask_1k = Cart.chr_size - 1;
SetMirrorType(EMirrorType.Vertical);
prg_banks_16k[0] = 0x00;
prg_banks_16k[1] = 0xFF;
prg_reg_16k = 0;
SyncPRG();
return true;
}
void SyncPRG()
{
prg_banks_16k[0] = prg_bank_16k;
prg_banks_16k[0] = prg_reg_16k & prg_bank_mask_16k;
prg_banks_16k[1] = 0xFF & prg_bank_mask_16k;
}
void WriteReg(int reg, byte value)
{
//Console.WriteLine("reg {0:X2} = {1:X2}", reg, value);
switch (reg)
{
case 0:
@ -117,7 +123,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
break;
case 8:
//NES.LogLine("mapping PRG {0}", value);
prg_bank_16k = value;
prg_reg_16k = value;
SyncPRG();
break;
case 9:
@ -168,7 +174,6 @@ namespace BizHawk.Emulation.Consoles.Nintendo
void ClockCPU()
{
if (!irq_countdown) return;
irq_counter--;
if (irq_counter == 0x0000)
{
@ -192,7 +197,6 @@ namespace BizHawk.Emulation.Consoles.Nintendo
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];
}