[PARPORT] parport_pc misidentifies SMC 37C951FR on Compaq Armada 1540DM + LS-120 problems

From: David Wilson (david@uow.edu.au)
Date: Wed Jun 20 2001 - 10:04:28 EDT

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    My Compaq Armada 1540DM running RH 7.1 appears to misidentify the
    printer port. The Compaq Setup program identifies it as ECP, Win95
    identifies it as ECP but parport_pc says it is:

    PC-style at 0x378 [PCSPP,TRISTATE,EPP]
    cpp_mux: aa55f00f52ad51(00)
    cpp_daisy: aa5500ff(00)
    assign_addrs: aa5500ff(00)

    According to Compaq:

     The ISA bus supports the "MSIO" multifunction Super IO chip (the SMC 37C951FR
     device, integrating an EPP/ECP parallel port, RS-232 serial port, Sir and Fir
     serial IR, keyboard interface/power control chip, and BIOS interface), the
     ESS1878 Audio chip, and the internal Modem.

    The Setup program does not allow changing the mode from ECP to anything
    else so why does parport report EPP and not ECP?

    Also, I have two Imation external parallel port LS-120 drives. The first
    is an old model (simple straight through cable, pass through port on rear
    of drive) and works on the Armada using paride+epat+pf. The second is newer
    and has an intelligent cable with printer pass through on the cable and a
    36 pin connector on the drive. This does not work under Linux on the Armada
    but does with Win95 on the same machine. It does work with Linux using the
    same modules as the older drive. Any ideas?

    David Wilson  School of IT & CS, Uni of Wollongong, Australia

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