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  Description:  Get or Set Allocation Strategy     DOS 3 Only
 
  Obtains or changes the code indicating the current MS-DOS strategy for
  allocating memory blocks.
 
  Input                               Output
  ════════════════════════            ══════════════════════════════
  If getting strategy code            If function successful
  AH=58H                              Carry flag=clear
  AL=00H                              and, if called with AL=00H
  If setting strategy code            AX=error code
  AH=58H                              If function unsuccessful
  AL=01H                              Carry flag=set
  BX=desired strategy code            AX=error code
     00H=first fit
     01H=best fit
     02H=last fit
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