PRB: Reset A20 Bit Set During DPMI Simulate Interrupt Crash (76582)


The information in this article applies to:

  • Microsoft Windows Software Development Kit (SDK) 3.0
  • Microsoft Windows Software Development Kit (SDK) 3.1
This article was previously published under Q76582

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.
Modification Type:MajorLast Reviewed:10/30/2003
Keywords:kb16bitonly KB76582
©2003 Microsoft Corporation. All rights reserved.