Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!b-tech!zeeff
From: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Newsgroups: comp.unix.microport
Subject: Re: 16550A in uport 3.0e ('386)
Message-ID: <5113@b-tech.ann-arbor.mi.us>
Date: 14 Feb 89 02:56:15 GMT
References: <5111@b-tech.ann-arbor.mi.us> <379@twwells.uucp>
Reply-To: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Organization: Branch Technology Ann Arbor, MI
Lines: 30

>: I have problems with the machine locking up when I install a 16550A
>: on a uport 3.0e system and enable the fifo.
>Yes.

>I enable it by writing 0xC9 to I/O port 0x3FA when I boot.  I have
>the standard driver. 

This is what I do and after some time (like overnight), I find that the
process using the port is hung.  If I kill it and start another, the
entire machine locks up.  It sounds like a driver problem to me, although
I suppose it could be caused by some interaction with my serial card or
the 16550A I have.

BTW, have those poeple who had 16550A drivers in
>beta released them yet?

Good question.

>I've always had problems with my modem locking up, in that the modem
>transmits to the system but the system doesn't hear it. This has not
>changed since I installed the 16550A. However, this has never brought

I've seen this problem under Dos Merge, but never from Unix.  I did find
that the 16550A cured all the problems I had with using the serial ports
at 2400 bps under Dos Merge.


-- 
  Jon Zeeff			zeeff@b-tech.ann-arbor.mi.us
  Ann Arbor, MI			mailrus!b-tech!zeeff