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From: jpederse@encad.Wichita.NCR.COM (John Pedersen)
Newsgroups: comp.sys.hp
Subject: Hardware flow control from S300
Message-ID: <398@encad.Wichita.NCR.COM>
Date: 7 Apr 88 20:25:01 GMT
Organization: NCR Corporation, Wichita, Kansas
Lines: 34
Keywords: flow

I'm trying to get my Series 310 to use hardware flow control and am having no
luck. Heres the setup

Series 310 running HP-UX 5.5 (6.0 is still in the box)
98628 buffered serial interface card (highly recommended)
other assorted cards (4 Meg, DMA, FHPIB)

I am trying to use uucp through an Ungerman Bass 180 NIU to another machine
at the other end of the factory.

When information comes from the NIU at 9600 baud it overrunns the 98628.

According to the HP 4951 protocol analyzer the HP tries to stop the data by
sending XOFF but the NIU is ignoring it, thus data overrun.

The board switches are set as the uucp manual recommends (4 on 5 off Full duplex
modem connection.

I have tried various /dev entries using all combinations of direct/modem
US/CCITT data in/data out. The protocol analyzer still shows the 98628 to be
using XON/XOFF which just doesn't work.

Thus I am heading toward the getty,gettydefs and inittab files to see if I can
find anything there that may set up the serial port, but the outlook doesn't 
look bright. (P.S. the HPUX is the single user version since the machine is
mainly used as an instrument controller, thus I don't think it will have an
entry in inittab as there are no incoming connections only outgoing)

Anyone know the answer and care to point me in the right direction?

-- 
John.Pedersen@Wichita.NCR.COM
NCR Engineering & Manufacturing
EMC Engineering Wichita KS
316-636-8837