PRB: Reset A20 Bit Set During DPMI Simulate Interrupt Crash

Last reviewed: July 23, 1997
Article ID: Q76582

3.00 3.10 WINDOWS kbprg kbprb

The information in this article applies to:

Microsoft Windows Software Development Kit (SDK) for Windows versions 3.0 and 3.1

SYMPTOMS

A Windows-based application that specifies "reset interrupt controller and A20 line" when calling the MS-DOS protected mode interrupt (DPMI) function "Simulate Real Mode Interrupt" can cause Windows to crash.

RESOLUTION

Applications that use the "Simulate Real Mode Interrupt" function must ensure that this bit is not set.

MORE INFORMATION

The "Simulate Real Mode Interrupt" function is documented in the DPMI specification.

Additional reference words: 3.00 3.10
KBCategory: kbprg kbprb
KBSubcategory: KrDpmi
Keywords : kb16bitonly

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Last reviewed: July 23, 1997
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