Int 2F/AX=1681h

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MS Windows 3+ - BEGIN CRITICAL SECTION

AX = 1681h

Notes: Used to prevent a task switch from occurring. Should be followed by an INT 2F/AX=1682h call as soon as possible. Nested calls are allowed, and must be followed by an appropriate number of "end critical section" calls. Not supported in Windows/386 2.x. Get INDOS flag with INT 21/AH=34h and increment by hand.

See Also: AX=1682h - INT 15/AX=101Bh - INT 21/AH=34h

Category: Windows - Int 2Fh - M

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