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[NTVDM]

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Fix the interleaved shift mode.
Don't halve the vertical resolution twice.


svn path=/branches/ntvdm/; revision=61535
This commit is contained in:
Aleksandar Andrejevic
2014-01-04 22:33:05 +00:00
parent 4d933b0747
commit 08b3bef080
1 changed files with 7 additions and 5 deletions
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subsystems/ntvdm/vga.c
+7 -5
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@@ -797,9 +797,9 @@ static VOID VgaUpdateFramebuffer(VOID)
* then 2 bits shifted from plane 1 and 3 for the next 4
*/
BYTE LowPlaneData = VgaMemory[((j / 4) % 2) * VGA_BANK_SIZE
+ (Address + (j / 4)) * AddressSize];
+ (Address + (j / 8)) * AddressSize];
BYTE HighPlaneData = VgaMemory[(((j / 4) % 2) + 2) * VGA_BANK_SIZE
+ (Address + (j / 4)) * AddressSize];
+ (Address + (j / 8)) * AddressSize];
/* Extract the two bits from each plane */
LowPlaneData = (LowPlaneData >> (6 - ((j % 4) * 2))) & 3;
@@ -1032,9 +1032,11 @@ COORD VgaGetDisplayResolution(VOID)
/* Halve the vertical resolution */
Resolution.Y >>= 1;
}
/* Divide the vertical resolution by the maximum scan line (== font size in text mode) */
Resolution.Y /= MaximumScanLine;
else
{
/* Divide the vertical resolution by the maximum scan line (== font size in text mode) */
Resolution.Y /= MaximumScanLine;
}
/* Return the resolution */
return Resolution;