INT 21 U - LASTBYTE.SYS v1.19 - IOCTL - GET ??? TABLE
        AX = 4402h
        BX = handle for device "LA$TBYTE"
        CX = 0004h
        DS:DX -> DWORD to hold address of 39-byte table of ???
Return: CF set on error
            AX = error code (see AH=59h)
        CF clear if successful
            AX = number of bytes read
Program: LASTBYTE.SYS is part of the shareware "The Last Byte" memory
          management package by Key Software Products
SeeAlso: AX=4402h"HIGHUMM"

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