Category: DOS extenders
Flags: available only in protected mode
INT 21 - Phar Lap 386/DOS-Extender VMM v2.1c+ - FREE PHYSICAL MEMORY PAGES 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