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====== Int 21H, AH=58H, AL=00H ======

===== Version =====

2.11 and higher

===== Brief =====

GET MEMORY ALLOCATION STRATEGY

===== Family API =====


===== Input =====

	AH = 58h
	AL = 00h

===== Return =====

     CF clear if successful
       AX = current strategy (see #01679)

	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
    
    (Table 01679)
  Values for DOS memory allocation strategy:
   00h low memory first fit
   01h low memory best fit
   02h low memory last fit
  ---DOS 5+ ---
   40h high memory first fit
   41h high memory best fit
   42h high memory last fit
   80h first fit, try high then low memory
   81h best fit, try high then low memory
   82h last fit, try high then low memory      
   
===== See also =====

   AH=48h,AH=49h,AH=4Ah,INT 2F/AX=4310h"XMS",INT 67/AH=3Fh

===== Note =====

Text based on [[http://www.cs.cmu.edu/~ralf/files.html|Ralf Brown Interrupt List Release 61]]

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