Q34576

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Q34576: MASM 5.10 MACRO.DOC: Memory Control

Article: Q34576
Version(s): 5.10   | 5.10
Operating System: MS-DOS | OS/2
Flags: ENDUSER |
Last Modified: 12-JAN-1989

The following information was taken from the MASM Version 5.10
MACRO.DOC file.

MEMORY CONTROL

@FreeBlok (49h)

Frees a block of memory

Syntax:         @FreeBlok [segment]

Argument:       segment     = Starting address of memory to be
                              freed; if none, ES address assumed
Return:         If carry set, error code in AX
Register used:  AX; ES if segment given

@GetBlok (48h)

Allocates a block of memory

Syntax:         @GetBlok paragraphs

Argument:       paragraphs  = Paragraphs (16 bytes) of memory
wanted
Return:         AX and ES   = Segment address of allocated
memory
                BX          = Paragraphs actually allocated (may be
                              less than requested if memory is short)
Register used:  AX and BX

@ModBlok (48h)

Modifies an allocated block of memory

Syntax:         @ModBlok paragraphs [,segment]

Argument:       paragraphs  = Paragraphs (16 bytes) of memory
wanted
                segment     = Starting address of memory to be
freed;
                              if none, ES address assumed
Return:         If carry set, error code in AX, else:
                        ES  = Segment address of allocated memory
                        BX  = If carry is clear, paragraphs allocated
Register used:  AX and BX; ES if segment given