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[NTVDM]: Temporarily fix for r65015 before a proper fix.

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svn path=/trunk/; revision=65018
This commit is contained in:
Hermès Bélusca-Maïto 2014-10-26 16:56:14 +00:00
parent b10d8f4686
commit d07dc3a5c2
1 changed files with 16 additions and 9 deletions
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25
reactos/subsystems/ntvdm/bios/vidbios.c
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@ -2296,9 +2296,16 @@ static BOOLEAN VidBiosSetVideoMode(BYTE ModeNumber)
{
BYTE Page;
COORD Resolution;
BOOLEAN DoNotClear = !!(ModeNumber & 0x80);
PVGA_REGISTERS VgaMode;
/*
* IBM standard modes do not clear the screen if the
* high bit of AL is set (EGA or higher only).
* See Ralf Brown: http://www.ctyme.com/intr/rb-0069.htm
* for more information.
*/
BOOLEAN DoNotClear = !!(ModeNumber & 0x80);
/* Retrieve the real mode number and check its validity */
ModeNumber &= 0x7F;
// if (ModeNumber >= sizeof(VideoModes)/sizeof(VideoModes[0]))
@ -2308,8 +2315,13 @@ static BOOLEAN VidBiosSetVideoMode(BYTE ModeNumber)
return FALSE;
}
/* Check if this is the same mode */
if (ModeNumber == Bda->VideoMode) return TRUE;
/* Check if this is the current mode */
if (ModeNumber == Bda->VideoMode)
{
/* Just clear the VGA memory if needed */
if (!DoNotClear) VgaClearMemory();
return TRUE;
}
VgaMode = VideoModes[ModeNumber];
@ -2320,12 +2332,7 @@ static BOOLEAN VidBiosSetVideoMode(BYTE ModeNumber)
VgaChangePalette(ModeNumber);
/*
* IBM standard modes do not clear the screen if the
* high bit of AL is set (EGA or higher only).
* See Ralf Brown: http://www.ctyme.com/intr/rb-0069.htm
* for more information.
*/
/* Clear the VGA memory if needed */
if (!DoNotClear) VgaClearMemory();
// Bda->CrtModeControl;