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commodore64: fix VIC color bleeding on screen memory access

This commit is contained in:
saxxonpike 2012-11-07 19:22:53 +00:00
parent f94a1ba798
commit 4e7a7226cd
1 changed files with 8 additions and 6 deletions
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14
BizHawk.Emulation/Computers/Commodore64/VicII.cs
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@ -481,9 +481,11 @@ namespace BizHawk.Emulation.Computers.Commodore64
public int borderTop;
public int characterColumn;
public byte characterData;
public byte characterDataBus;
public byte[] characterMemory;
public bool charactersEnabled;
public byte colorData;
public byte colorDataBus;
public byte[] colorMemory;
public int cycle;
public int cycleLeft;
@ -577,8 +579,8 @@ namespace BizHawk.Emulation.Computers.Commodore64
public void Fetch000C()
{
int cAddress = (regs.VM << 10) | regs.VC;
characterData = mem.VicRead((ushort)cAddress);
colorData = mem.colorRam[regs.VC];
characterDataBus = mem.VicRead((ushort)cAddress);
colorDataBus = mem.colorRam[regs.VC];
}
public void Fetch000G()
{
@ -662,8 +664,8 @@ namespace BizHawk.Emulation.Computers.Commodore64
// idle fetch
public void FetchIdleC()
{
characterData = 0;
colorData = 0;
characterDataBus = 0;
colorDataBus = 0;
}
public void FetchIdleG()
{
@ -721,8 +723,8 @@ namespace BizHawk.Emulation.Computers.Commodore64
if (badLine)
{
FetchC();
characterMemory[regs.VMLI] = characterData;
colorMemory[regs.VMLI] = colorData;
colorMemory[regs.VMLI] = colorDataBus;
characterMemory[regs.VMLI] = characterDataBus;
}
}
else if (cycle == 55)