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AX = 251Ch BH = preservation flag (00h preserve contents, 01h discard contents) EDX = number of pages to free BL = address type 00h linear address ECX = linear address of first page to be freed 01h pointer ES:ECX -> first page to be freed
Return:
CF clear if successful CF set on error EAX = error code 08h memory error, swap space full, no VMM or DPMI 09h invalid address
Category: DOS Extenders - Int 21h - P
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