Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bloom-beacon!spdcc!dyer
From: dyer@spdcc.COM (Steve Dyer)
Newsgroups: comp.sys.ibm.pc.rt
Subject: Re: 4-port card problem with 12/88 AOS
Message-ID: <3383@ursa-major.SPDCC.COM>
Date: 26 May 89 22:11:21 GMT
References: <39727@cmcl2.NYU.EDU> <39755@cmcl2.NYU.EDU> <66@archet.UUCP>
Reply-To: dyer@ursa-major.spdcc.COM (Steve Dyer)
Organization: S.P. Dyer Computer Consulting, Cambridge MA
Lines: 30

In article <66@archet.UUCP> wlm@archet.UUCP (William L. Moran Jr.) writes:
>Yes, this problem is known to IBM (and has been for at least 18
>months), A friend and I have done a great deal of experimentation to  
>determine what causes (or exacerbates) the problem and have the found 
>the following:
>
>[lots of hardware discussions]

I hope that the remaining people at IBM who are responsible for AOS 4.3 support
aren't unduly misled by this list, because although I'm sure what you
describe may be a serious problem itself, it is NOT the problem that Jan
and I are describing because different software with the same hardware
behaves differently.  There is a clear software problem.  Something
broke between Sep 88 and Dec 88.

I have a system with one EESDI controller, and one ST506 controller; 3
drives in all (1 ESDI, 2 ST506).  One 4 port buffered card with one port
used constantly as a 19.2kb SLIP line and the remaining 3 ports in use
with Telebits ranging from 1200 to 19.2kb.  An APA16.

Simply put, the Dec 88 kernel doesn't work on the 4 port serial lines AT ALL.
I am running with a Dec 88 software base but with a Sep 88 kernel.  This
set-up works fine.  I can't imagine why it should take IBM so long to fix
this.  After all, something changed within a 3 month release cycle, and
both sources are presumably available to them for inspection.

-- 
Steve Dyer
dyer@ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
dyer@arktouros.mit.edu