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[NTVDM]

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Simplify code.

svn path=/branches/ntvdm/; revision=59681
This commit is contained in:
Hermès Bélusca-Maïto 2013-08-09 14:01:43 +00:00
parent 431f16ab22
commit 2f3827d040
1 changed files with 4 additions and 9 deletions
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13
subsystems/ntvdm/vga.c
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@ -569,7 +569,7 @@ DWORD VgaGetVideoLimitAddress(VOID)
COORD VgaGetDisplayResolution(VOID)
{
COORD Resolution;
BYTE TextSize = 1 + (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & 0x1F);
BYTE MaximumScanLine = 1 + (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & 0x1F);
/* The low 8 bits are in the display registers */
Resolution.X = VgaCrtcRegisters[VGA_CRTC_END_HORZ_DISP_REG];
@ -597,15 +597,10 @@ COORD VgaGetDisplayResolution(VOID)
/* The horizontal resolution is halved in 8-bit mode */
if (VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_8BIT) Resolution.X /= 2;
}
/* Divide the vertical resolution by the maximum scan line */
Resolution.Y /= ((DWORD)VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & 0x1F) + 1;
}
else
{
/* Divide the number of scanlines by the font size */
Resolution.Y /= TextSize;
}
/* Divide the vertical resolution by the maximum scan line (== font size in text mode) */
Resolution.Y /= MaximumScanLine;
/* Return the resolution */
return Resolution;