Category: DOS kernel
INT 21 - DOS 2.11+ - GET OR SET MEMORY ALLOCATION STRATEGY AH = 58h AL = subfunction 00h get allocation strategy Return: AX = current strategy (see #01679) 01h set allocation strategy BL = new allocation strategy (see #01679) BH = 00h (DOS 5+) Return: CF clear if successful CF set on error AX = error code (01h) (see #01680) Notes: the Set subfunction accepts any value in BL for DOS 3.x and 4.x; 2 or greater means last fit the Get subfunction returns the last value set setting an allocation strategy involving high memory does not automatically link in the UMB memory chain; this must be done explicitly with AX=5803h in order to actually allocate high memory a program which changes the allocation strategy should restore it before terminating Toshiba MS-DOS v2.11 supports subfunctions 00h and 01h, as does the TI Professional MS-DOS v2.13 DR DOS 3.41 reportedly reverses subfunctions 00h and 01h SeeAlso: AH=48h,AH=49h,AH=4Ah,INT 2F/AX=4310h"XMS",INT 67/AH=3Fh