Compatibility: 3.0+

Expects: AX    4310H

Returns: ES:BX far address of the XMS function dispatcher

Info: Obtains the address of the XMS function dispatcher, though which

all eXtended Memory Specification services are accessed.

Before using this fn, use INT 2fH 4300H to check to see if the

XMS provider has been installed.

See Extended Memory Specification (XMS) for information on how to

access XMS services and a description of the available fns.

Example: ;--------------- check for and access an EMM fn

dd  pfEmmFns     ;will hold 32-bit segment:offset addr

.

.

.

mov  ax,4300H

int  2fH

cmp  al,80H      ;is support present?

jne  no_ems      ; no, go

mov  ax,4310H    ;get entry address

int  2fH

mov  word ptr [pfEmmFns],bx

mov  word ptr [pfEmmFns+2],es

;--------------- now call a service

mov  ah,00H      ;get XMS version

call [pfEmmFns]  ; this is a far call

;--------------- on most calls, check for AX=0001 (error)

See Also: INT 2fH 43xxH: HIMEM.SYS Functions

INT 2fH: Multiplex Interrupt

DOS Functions

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