INT 2F U - Novell NetWare Lite v1.1 - NLCACHE - INSTALLATION CHECK
        AX = D8C0h
Return: AL = FFh if installed
            CL = cache variant (01h NLCACHEC, 02h NLCACHEX, 03h NLCACHEM)
            DH = major version??? (01h for v1.1)
            DL = minor version??? (01h for v1.1)
            ES:DI -> private API entry point (see below)
Program: NLCACHE is a disk cache included with NetWare Lite
SeeAlso: AX=D800h,AX=D880h

Call NLCACHE API entry point with:
        BX = function
            0000h ???
                ???
                Return: CF clear if successful
                            AX = 0000h
                            ???
                        CF set on error
                            AX = error code
            other
                Return: CF set
                        AX = 0001h (invalid function)

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