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megadrive.cpp - fix DrawWindow for 32-cell mode

This commit is contained in:
Barry Harris 2014-08-07 20:17:29 +00:00
parent ad16a8b9fd
commit a1f2f7634f
1 changed files with 7 additions and 3 deletions
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10
src/burn/drv/megadrive/megadrive.cpp
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@ -3427,9 +3427,13 @@ static void DrawWindow(INT32 tstart, INT32 tend, INT32 prio, INT32 sh)
INT32 blank = -1; // The tile we know is blank
// Find name table line:
nametab = (RamVReg->reg[3] & 0x3c)<<9;
if (RamVReg->reg[12] & 1) nametab += (Scanline>>3)<<6; // 40-cell mode
else nametab += (Scanline>>3)<<5; // 32-cell mode
if (RamVReg->reg[12] & 1) {
nametab = (RamVReg->reg[3] & 0x3c)<<9;
nametab += (Scanline>>3)<<6; // 40-cell mode
} else {
nametab = (RamVReg->reg[3] & 0x3e)<<9;
nametab += (Scanline>>3)<<5; // 32-cell mode
}
tilex = tstart<<1;
tend <<= 1;