Int 2F/AX=1B00h

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DOS 4+ XMA2EMS.SYS extension internal - INSTALLATION CHECK

AX = 1B00h

Return:
AL = FFh if installed

Note: XMA2EMS.SYS extension is only installed if DOS has page frames to hide.. This extension hooks onto INT 67/AH=58h and returns from that call data which excludes the physical pages being used by DOS.

See Also: AH=1Bh"FRAME INFO"

Category: Memory Management - Int 2Fh - D

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