INT 21 u - Named Pipes - LOCAL DosPeekNmPipe
        AX = 5F35h
        BX = handle
        CX = buffer length
        DS:SI -> buffer
Return: CF clear if successful
            CX = bytes read
            SI = bytes left in the pipe
            DX = bytes left in the current message
            DI = pipe status
                0001h disconnected
                0002h listening
                0003h connected
                0004h closing
        CF set if error
            AX = error code
Note:   this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
SeeAlso: AX=5F38h,AX=5F39h,AX=5F51h

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