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c64- implement multicolor text mode rendering

This commit is contained in:
saxxonpike 2012-11-06 06:01:45 +00:00
parent 4af6b10971
commit 899efca9d3
1 changed files with 23 additions and 1 deletions
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24
BizHawk.Emulation/Computers/Commodore64/VicII.cs
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@ -813,6 +813,7 @@ namespace BizHawk.Emulation.Computers.Commodore64
vBlank = !visibleRenderY; vBlank = !visibleRenderY;
} }
// standard text mode
private int Plot000(int offset) private int Plot000(int offset)
{ {
byte charData = bitmapData; byte charData = bitmapData;
@ -823,9 +824,30 @@ namespace BizHawk.Emulation.Computers.Commodore64
return regs.BxC[0]; return regs.BxC[0];
} }
// multicolor text mode
private int Plot001(int offset) private int Plot001(int offset)
{ {
return regs.BxC[0]; if ((colorMemory[characterIndex] & 0x08) != 0x00)
{
byte charData = bitmapData;
offset |= 0x01;
offset ^= 0x01;
charData <<= offset;
charData >>= 6;
switch (charData)
{
case 0:
case 1:
case 2:
return regs.BxC[charData];
default:
return colorMemory[characterIndex];
}
}
else
{
return Plot000(offset);
}
} }
private int Plot010(int offset) private int Plot010(int offset)