INT 1A - PCMCIA Socket Services - GET PAGE
        AH = 8Ah
        AL = adapter number
        BH = window number
        BL = page number
Return: CF clear if successful
            AH destroyed
            DX = page attributes
                bit 0: page enabled
                bits 15-1 reserved (0)
            DI = memory card offset (4K units)
        CF set on error
            AH = error code (01h,08h,11h) (see AH=80h"PCMCIA")
Notes:  this function is only valid for memory-mapped windows
        the socket being operated on is implied by the previous AH=89h call
SeeAlso: AH=88h,AH=8Bh

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