INT 21,31 - Terminate Process and Remain Resident

AH = 31h

AL = exit code (returned to batch files)

DX = memory size in paragraphs to reserve

returns nothing

- preferred method for Terminate and Stay Resident programs

- terminates process without releasing allocated memory and

without closing open files

- attempts allocation of memory specified in DX from memory

allocated by DOS at startup. ~INT 21,48~ memory allocation

is not affected

- see ~INT 27~