HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                      INT 21,49 - Free Allocated Memory

       AH = 49h
       ES = segment of the block to be returned (MCB + 1para)

       on return:
       AX = error code if CF set  (see DOS ERROR CODES)

       - releases memory and MCB allocated by INT 21,48
       - may cause unpredictable results is memory wasn't allocated using
         INT 21,48 or if memory wasn't allocated by the current process
       - checks for valid MCB id, but does NOT check for process ownership
       - care must be taken when freeing the memory of another process, to
         assure the segment isn't in use by a TSR or ISR
       - this function is unreliable in a TSR once resident, since
         COMMAND.COM and many other .COM files take all available memory
         when they load
       - see  INT 21,4A

Esc or Alt-X to exit int 21,49 Home/PgUp/PgDn/End ←↑↓→
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