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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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