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AH = 31h AL = return code DX = number of paragraphs to keep resident
Return:
Never
Notes: The value in DX only affects the memory block containing the PSP; additional memory allocated via AH=48h is not affected. The minimum number of paragraphs which will remain resident is 11h for DOS 2.x and 06h for DOS 3.0+. Most TSRs can save some memory by releasing their environment block before terminating (see #01378 at AH=26h,AH=49h). Any open files remain open, so one should close any files which will not be used before going resident; to access a file which is left open from the TSR, one must switch PSP segments first (see AH=50h)
See Also:
AH=00h - AH=4Ch - AH=4Dh - INT 20 -
Category:
DOS Kernel
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Int 21h
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D
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