Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!tut.cis.ohio-state.edu!n8emr!uncle!jbm
From: jbm@uncle.uucp (John B. Milton)
Newsgroups: comp.sys.3b1
Subject: Re: Eliminating the OBM
Message-ID: <1991Mar2.072157.1220@uncle.uucp>
Date: 2 Mar 91 07:21:57 GMT
References: <295@platypus.uofs.edu>
Organization: U.N.C.L.E.
Lines: 24

In article <295@platypus.uofs.edu> bill@platypus.uofs.edu (Bill Gunshannon) writes:
>Has anyone tried removing the OBM and converting /dev/ph1 to a real TTY?
>Is there anyone on the net who can provide a schematic of the motherboard
>for the 3b1?  I would like to do some modifying, but can't possibly afford
>the whole set of tech manuals even if I could find them.

John Lydic has this one completely worked out, and it does work. With his idea
you will have to set the baud rate with a dip switch, but hey! I'd do that to
get another serial port. John has just received an EIA card and he recently
got a TB, so he will soon become more net-connected.

BTW, John Lydic has done a lot on something called the "Mondo Combo" card,
which has already been designed from a schematic point of view, but has not
yet been layed out as a board. It will have SCSI, 4M of RAM (2 expansion and
2 RAM disk), 8 serial ports and a few other goodies. He is planning to see
bare boards and PALs. The board is designed so that, for the most part one
can populate only the common bus interface and the part you're interested in.
John selected a Western Digital SCSI chip which he has written OS/9 drivers
for.

John
-- 
John Bly Milton IV, jbm@uncle.UUCP, n8emr!uncle!jbm@osu-cis.cis.ohio-state.edu
(614) h:252-8544, w:785-1110; N8KSN, AMPR: 44.70.0.52; Don't FLAME, inform!