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NES - start BANDAI-FCG-1 board (mappers 69 + 159)

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andres.delikat 2011-09-18 02:49:09 +00:00
parent a121ef1c77
commit 7c55b343ae
1 changed files with 152 additions and 0 deletions
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152
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/BANDAI-FCG-1.cs Normal file
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@ -0,0 +1,152 @@
using System;
using System.IO;
using System.Diagnostics;
namespace BizHawk.Emulation.Consoles.Nintendo
{
//AKA mapper 16 & 159
/*
Example Games:
--------------------------
Dragon Ball - Dai Maou Jukkatsu (016)
Dragon Ball Z Gaiden (016)
Dragon Ball Z 2 (016)
Rokudenashi Blues (016)
Akuma-kun - Makai no Wana (016)
Dragon Ball Z - Kyoushuu! Saiya Jin (159)
SD Gundam Gaiden (159)
Magical Taruruuto Kun 1, 2 (159)
PRG_ROM: 128KB
PRG_RAM: None
CHR-ROM: 128KB
CHR_RAM: None
No Batter
Mapper controlled mirroring
No CIC present
*/
class BANDAI_FCG_1 : NES.NESBoardBase
{
//configuration
int prg, chr_bank_mask_1k, mirror;
bool irq_countdown, irq_enabled, irq_asserted;
ushort irq_counter;
int clock_counter;
int addr_reg;
ByteBuffer regs = new ByteBuffer(12);
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "BANDAI-FCG-1":
AssertPrg(128); AssertChr(128); AssertWram(0); AssertVram(0);
break;
default:
return false;
}
return true;
}
protected void BaseConfigure()
{
chr_bank_mask_1k = Cart.chr_size - 1;
SetMirrorType(EMirrorType.Vertical);
}
public override byte ReadPRG(int addr)
{
return ROM[addr + (prg * 0x8000)];
}
public override void WritePRG(int addr, byte value)
{
switch (addr)
{
case 0: case 1: case 2: case 3:
case 4: case 5: case 6: case 7:
regs[addr_reg] = value;
break;
case 8:
prg = value;
break;
case 9:
mirror = value & 0x03;
switch (mirror)
{
case 0: SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical); break;
case 1: SetMirrorType(NES.NESBoardBase.EMirrorType.Horizontal); break;
case 2: SetMirrorType(NES.NESBoardBase.EMirrorType.OneScreenA); break;
case 3: SetMirrorType(NES.NESBoardBase.EMirrorType.OneScreenB); break;
}
break;
case 0xA:
irq_enabled = value.Bit(0);
break;
case 0xB:
irq_counter &= 0xFF00;
irq_counter |= value;
break;
case 0xC:
irq_counter &= 0x00FF;
irq_counter |= (ushort)(value << 8);
break;
case 0xD:
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;
irq_counter--;
if (irq_counter == 0x0000)
{
irq_asserted = true;
SyncIrq();
}
}
public override void SyncState(Serializer ser)
{
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);
}
}
}