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AtariHawk - fixes to the E7 mapper, still broken, don't know why, tired of looking at it

This commit is contained in:
adelikat 2012-10-19 00:13:39 +00:00
parent 00934939b0
commit 563065d054
1 changed files with 31 additions and 19 deletions
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50
BizHawk.Emulation/Consoles/Atari/2600/Mappers/mE7.cs
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@ -32,7 +32,7 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
class mE7 : MapperBase
{
int toggle = 0;
int rombank_1k = 0;
int rambank1_toggle = 0;
ByteBuffer rambank0 = new ByteBuffer(1024);
ByteBuffer rambank1 = new ByteBuffer(1024);
@ -40,32 +40,44 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
public override byte ReadMemory(ushort addr)
{
if (addr < 0x1000)
{
return base.ReadMemory(addr);
}
Address(addr);
if (addr < 0x1000) return base.ReadMemory(addr);
else if (addr < 0x1400)
if (addr < 0x1800)
{
if (EnableRam0)
{
return rambank0[(addr & 1023)];
if (addr < 0x1400) //Reading from the write port
{
return rambank0[addr & 0x3FF] = 0xFF; //Reading from 1k write port triggers an unwanted write
}
else
{
return rambank0[addr & 0x3FF];
}
}
else
{
return core.rom[toggle * 2 * 1024 + (addr & 0x7FF)];
return core.rom[(rombank_1k * 0x800) + (addr & 0x7FF)];
}
}
else if (addr < 0x1800)
else if (addr < 0x1900) //Ram 1 Read port
{
return core.rom[toggle * 2 * 1024 + (addr & 0x7FF)];
return rambank1[(rambank1_toggle * 0x100) + (addr & 0xFF)];
}
else if (addr < 0x1A00)
else if (addr < 0x1A00) //Ram 1 Write port
{
return rambank1[toggle * 256 + (addr & 0x255)];
return rambank1[(rambank1_toggle * 0x100) + (addr & 0xFF)] = 0xFF; //Reading from the 256b write port @1800 riggers an unwanted write
}
else if (addr < 0x2000)
{
addr -= 0x1A00;
addr &= 0x5FF;
return core.rom[14848 + addr]; //Fixed to last 1.5K
int offset = core.rom.Length - 0x0600;
return core.rom[offset + addr]; //Fixed to last 1.5K
}
else
{
@ -85,14 +97,14 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
}
else if (addr >= 0x1800 && addr < 0x2000)
{
rambank0[(addr & 0xFF) + (rambank1_toggle * 0x100)] = value;
rambank1[(addr & 0xFF) + (rambank1_toggle * 0x100)] = value;
}
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("toggle", ref toggle);
ser.Sync("toggle", ref rombank_1k);
ser.Sync("rambank0", ref rambank0);
ser.Sync("rambank1", ref rambank1);
ser.Sync("EnableRam0", ref EnableRam0);
@ -104,25 +116,25 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
switch (addr)
{
case 0x1FE0:
toggle = 0;
rombank_1k = 0;
break;
case 0x1FE1:
toggle = 1;
rombank_1k = 1;
break;
case 0x1FE2:
toggle = 2;
rombank_1k = 2;
break;
case 0x1FE3:
toggle = 3;
rombank_1k = 3;
break;
case 0x1FE4:
toggle = 4;
rombank_1k = 4;
break;
case 0x1FE5:
toggle = 5;
rombank_1k = 5;
break;
case 0x1FE6:
toggle = 6;
rombank_1k = 6;
break;
case 0x1FE7:
EnableRam0 = true;