Int 21H Function 31H
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Description: Terminate and Stay Resident
Terminates execution of the currently executing program, passing a return
code to the parent process, but reserves part or all of the program's
memory so that it will not be overlaid by the next transient program to
be loaded.
Input Output
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AH=31H Nothing
AL=return code
DX=amount of memory to reserve (in paragraphs)
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