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[NTVDM]: Fix a bug introduced in revision 64324, where I didn't restore the original values of CF and AX. Fix some keyboard issues in Mystery Mansion.
svn path=/trunk/; revision=64360
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@ -194,6 +194,7 @@ static VOID WINAPI BiosKeyboardService(LPWORD Stack)
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// Keyboard IRQ 1
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static VOID WINAPI BiosKeyboardIrq(LPWORD Stack)
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{
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BOOLEAN SkipScanCode;
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BYTE ScanCode, VirtualKey;
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WORD Character;
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@ -204,18 +205,25 @@ static VOID WINAPI BiosKeyboardIrq(LPWORD Stack)
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* In return, if CF is set we continue processing the scan code
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* stored in AL, and if not, we skip it.
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*/
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BYTE CF, AX;
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CF = getCF();
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AX = getAX();
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setCF(1);
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setAL(IOReadB(PS2_DATA_PORT));
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setAH(0x4F);
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Int32Call(&BiosContext, BIOS_MISC_INTERRUPT);
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/* Check whether CL is clear. If so, skip the scan code. */
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if (getCF() == 0) goto Quit;
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/**/setCF(0);/**/ // FIXME: HACK: Reset CF otherwise we enter in an infinite loop.
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/* Retrieve the modified scan code in AL */
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SkipScanCode = (getCF() == 0);
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ScanCode = getAL();
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setAX(AX);
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setCF(CF);
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/* Check whether CF is clear. If so, skip the scan code. */
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if (SkipScanCode) goto Quit;
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/* Get the corresponding virtual key code */
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VirtualKey = MapVirtualKey(ScanCode & 0x7F, MAPVK_VSC_TO_VK);
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