[comp.sys.apollo] /dev/pio1 and /dev/pio1.conf help?

mandler@apollo.hp.com (John Mandler) (06/15/91)

>> herb@ajfcal.uucp (Herb Peyerl) writes
>> 
>> ... Now I find myself needing to hook up a QMS-810+ printer
>> to the parallel port on a 400t... I've used the information 
>> in /install/doc/apollo/os.10.3.release_notes and created the
>> file "/sys/node_data/etc/pio1.conf" with the appropriate information
>> from the release notes... However, the printer blocks when I send
>> a postscript document to the printer... ie: it blocks so bad, I
>> can only "sigp -b" the process... After that I have to shutdown 
>> the machine before I can attempt again... I can't locate where
>> the pio1.conf stuff is documented more fully... I'd like some 
>> descriptions of options there are and what the mnemonics mean...

        The problem is a centronics handshaking protocol which is different
        from the parallel port hardware handshake protocol.  After sr10.3
        we discovered a number of printers with this inconsistency , including the 
        QMS 810 . Patches 240 and 243, issued in March 1990, address this problem.
        Install this patch and edit your pio1.conf file to use NSTRB_ONLY handshake
        mode. pskq2 also addresses this problem and is the prefered solution. 

        John Mandler
        UTD East
        Hewlett-Packard Company, Apollo Division
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