Xref: utzoo comp.unix.i386:586 comp.unix.xenix:7800
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!gatech!psuvax1!psuvm!cunyvm!ndsuvm1.bitnet!nu013809
From: NU013809@NDSUVM1.BITNET (Greg Wettstein)
Newsgroups: comp.unix.i386,comp.unix.xenix
Subject: Re: Mylex SCSI Controller, 16550A UARTS
Message-ID: <2834NU013809@NDSUVM1>
Date: 26 Sep 89 13:46:49 GMT
References: <111016@nstar.UUCP> <707@fiver.UUCP>
Organization: North Dakota Higher Education Computer Network, Fargo, ND
Lines: 25

I am in the process of updating a terminal emulator that we use extensively
in house under VPIX.  As long as I am going to have the async. drivers taken
apart I was thinking about adding support for the 16550A.

I have been looking around for a source for a couple of these chips but have
not been successful.  I know that about 8 months ago someone on the net was
advertising single quantities from a large stockpile they had purchased but
I have not heard anything about this since.  If anyone has any information
about sources or has a couple they would like to part with please contact me
either through mail or via the net.  I would also be interested in locating
any and all information on the technical aspects of programming this device.
From my understanding of the subject it is possible for application software
to 'sense' the presence of a 16550A and enable the FIFO's.  I gather from his
documentation that Chuck Forsberg of Omen does this with this DSZ and YAM
packages.

So if anybody has source or technical information on the 16550A I would be
eager to hear from you.  When I get 16550A support into the emulator I will
advise the net if I see any performance changes running under DOS/VPIX.
Once again thank you to everyone for offering an attentive ear(eye).


                                     As always,
                                     Dr. Greg Wettstein
                                     NU013809@NDSUVM1