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Copyright 1991 David Jurgens |
INT 21,51 - Get Current Process ID (Undocumented DOS 2.x)
AH = 51h
on return:
BX = process ID
- The process ID number is actually the segment address of program's
PSP. This in conjunction with INT 21,50 is useful for TSR's to
access their own file handle table in their respective PSP.
- this function cannot be called while in an INT 28 handler in
DOS 2.x unless the critical error flag is set or stack corruption
will occur
- INT 21,62 is highly recommended for DOS 3.x due to a possible bug
when activated from a TSR. DOS may switch to the wrong internal
stack which may cause a problems with TSR's if called during an
INT 28.
- see INT 21,62 (Get PSP segment) for DOS 3.x applications
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| Esc or Alt-X to exit |
int 21,51 |
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