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demo altered freeze system for nes

This commit is contained in:
zeromus 2011-08-03 01:42:51 +00:00
parent 74a58186df
commit 0f2b81796f
3 changed files with 34 additions and 16 deletions
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30
BizHawk.Emulation/Consoles/Nintendo/NES/Core.cs
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@ -17,13 +17,38 @@ namespace BizHawk.Emulation.Consoles.Nintendo
public PPU ppu;
public APU apu;
byte[] ram;
MemoryDomain.FreezeData[] sysbus_freeze = new MemoryDomain.FreezeData[65536];
NESWatch[] sysbus_watch = new NESWatch[65536];
public byte[] CIRAM; //AKA nametables
string game_name; //friendly name exposed to user and used as filename base
CartInfo cart; //the current cart prototype. should be moved into the board, perhaps
INESBoard board; //the board hardware that is currently driving things
private struct FreezeRecord
{
public int Address;
public MemoryDomain.FreezeData Data;
}
List<FreezeRecord> sysbus_freeze_list = new List<FreezeRecord>();
List<FreezeRecord> ppubus_freeze_list = new List<FreezeRecord>();
MemoryDomain.FreezeData GetFreeze(List<FreezeRecord> list, int addr)
{
int index = list.FindIndex((fd) => fd.Address == addr);
if (index == -1) return MemoryDomain.FreezeData.Empty;
return list[index].Data;
}
void SetFreeze(List<FreezeRecord> list, int addr, MemoryDomain.FreezeData data)
{
int index = list.FindIndex((fd) => fd.Address == addr);
if (index != -1) list.RemoveAt(index);
if(!data.IsFrozen) return;
FreezeRecord fr = new FreezeRecord();
fr.Data = data;
fr.Address = addr;
list.Add(fr);
}
bool _irq_apu, _irq_cart;
public bool irq_apu { get { return _irq_apu; } set { _irq_apu = value; sync_irq(); } }
public bool irq_cart { get { return _irq_cart; } set { _irq_cart = value; sync_irq(); } }
@ -239,9 +264,6 @@ namespace BizHawk.Emulation.Consoles.Nintendo
else if (addr < 0x8000) ret = board.ReadWRAM(addr - 0x6000);
else ret = board.ReadPRG(addr - 0x8000);
//apply freeze
if (sysbus_freeze[addr].IsFrozen) ret = sysbus_freeze[addr].value;
//handle breakpoints and stuff.
//the idea is that each core can implement its own watch class on an address which will track all the different kinds of monitors and breakpoints and etc.
//but since freeze is a common case, it was implemented through its own mechanisms

12
BizHawk.Emulation/Consoles/Nintendo/NES/NES.cs
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@ -291,14 +291,14 @@ namespace BizHawk.Emulation.Consoles.Nintendo
var CIRAMdomain = new MemoryDomain("CIRAM (nametables)", 0x800, Endian.Little,
addr => CIRAM[addr & 0x07FF], (addr, value) => CIRAM[addr & 0x07FF] = value);
SystemBus.GetFreeze = addr => sysbus_freeze[addr];
SystemBus.SetFreeze = (addr, value) => sysbus_freeze[addr] = value;
SystemBus.GetFreeze = addr => GetFreeze(sysbus_freeze_list, addr);
SystemBus.SetFreeze = (addr, value) => SetFreeze(sysbus_freeze_list, addr, value);
RAM.GetFreeze = addr => sysbus_freeze[addr & 0x07FF];
RAM.SetFreeze = (addr, value) => sysbus_freeze[addr & 0x07FF] = value;
RAM.GetFreeze = addr => GetFreeze(sysbus_freeze_list, addr);
RAM.SetFreeze = (addr, value) => SetFreeze(sysbus_freeze_list, addr & 0x07FF, value);
PPUBus.GetFreeze = addr => ppu.ppubus_freeze[addr];
PPUBus.SetFreeze = (addr, value) => ppu.ppubus_freeze[addr] = value;
PPUBus.GetFreeze = addr => GetFreeze(ppubus_freeze_list, addr);
PPUBus.SetFreeze = (addr, value) => SetFreeze(ppubus_freeze_list, addr, value);
//demo a game genie code
GetWatch(NESWatch.EDomain.Sysbus, 0xB424).SetGameGenie(-1, 0x10);

6
BizHawk.Emulation/Consoles/Nintendo/NES/PPU.cs
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@ -23,7 +23,6 @@ namespace BizHawk.Emulation.Consoles.Nintendo
public DebugCallback NTViewCallback;
public DebugCallback PPUViewCallback;
public MemoryDomain.FreezeData[] ppubus_freeze = new MemoryDomain.FreezeData[16384];
//when the ppu issues a write it goes through here and into the game board
public void ppubus_write(int addr, byte value)
@ -40,10 +39,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
return 0xFF;
nes.board.AddressPPU(addr);
//apply freeze
if (ppubus_freeze[addr].IsFrozen)
return ppubus_freeze[addr].value;
else
return nes.board.ReadPPU(addr);
}