X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 2f - multiplex - dos 4+ xma2ems.sys extens internal

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INT 2F - Multiplex - DOS 4+ XMA2EMS.SYS extens internal - GET HIDDEN FRAME INFO
        AX = 1B01h
        DI = hidden physical page number
Return: AX = FFFFh if failed (no such hidden page)
        AX = 0000h if OK, then
             ES = segment of page frame
             DI = physical page number
Note:   this corresponds to the data edited out of the INT 67/AH=58h call
SeeAlso: AX=1BFFh

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