Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!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: <3349@ursa-major.SPDCC.COM>
Date: 23 May 89 22:10:33 GMT
References: <39727@cmcl2.NYU.EDU>
Reply-To: dyer@ursa-major.spdcc.COM (Steve Dyer)
Organization: S.P. Dyer Computer Consulting, Cambridge MA
Lines: 23

In article <39727@cmcl2.NYU.EDU> edler@cmcl2.UUCP (Jan Edler) writes:
>Someone posted something about this a few weeks ago, but I don't
>remember who, and never saw a followup.  We just tried to bring up the
>December 1988 AOS kernel on an RT with a buffered 4-port asynchronous
>card, and discovered that, indeed, it doesn't work.  We can keep
>running the September 1988 kernel on this system for awhile, but does
>anyone have a fix?  I've looked at the driver, and I think the problem
>is fairly obvious, but I'd rather not have to fix it myself.

Yes, I was the one posting about this.  I haven't heard squat, and
I'm still running the Sep. kernel.

I tried removing the software interrupt processing from the driver,
the feature which seems to be responsible for diffs in the TTY subsystem's
code (TTY layer, ldisc and drivers) between Sep 88 and Dec 88, but what
I ended up with was an almost continual screenful of "asyN: overrun"-type
errors given even the slightest input.  I may have blown it, but I don't
think so.

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