[comp.sys.ibm.pc.hardware] Need info on I/O ports

F66204@BARILVM.BITNET (Shaul Wallach) (05/24/91)

    Where can I find complete details about all the I/O ports for
the IBM PC XT and compatibles? I would like to know the meaning
of each bit in all the control and status registers and the data
formats. Our copy of the IBM PC XT Technical Reference doesn't
explain the functions of all the I/O addresses, and the other
books we have are also incomplete.

     Thanks very much for any help available.

Shaul Wallach