home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!mcsun!sun4nl!hgatenl!tedux!F_HOME!leo
- From: leo@ahwau.ahold.nl (Leo Weppelman)
- Newsgroups: comp.sys.m68k
- Subject: Re: problems with m68882
- Keywords: m68882
- Message-ID: <239@F_HOME.ahwau.ahold.nl>
- Date: 10 Sep 92 14:03:28 GMT
- References: <219@F_HOME.ahwau.ahold.nl> <92Sep08.184615.11893@acs.ucalgary.ca>
- Sender: usenet@F_HOME.ahwau.ahold.nl
- Lines: 38
- Nntp-Posting-Host: ontnix
-
- In <92Sep08.184615.11893@acs.ucalgary.ca> norm@enel.ucalgary.ca (Norm Bartley) writes:
-
- >In article <219@F_HOME.ahwau.ahold.nl> leo@ontnix2.ahwau.ahold.nl (Leo Weppelman) writes:
- >>I am working on an multi-tasking kernel on my Atari-TT. It contains an
- >>68030 main processor and an 68882 coprocessor on 33Mhz.
- >>
- >>I am getting coprocessor protocol violations at random but especially
- >>when a lot of interrupts occur (i.e. during disk accesses).
-
- >I have had similar problems on my Amiga while trying to add 68882
- >support to Amiga Minix. I followed the exact same procedure as you for
- >saving/restoring/initializing the 68882 context. I would get coprocessor
- >protocol violations at random -- a process might bomb immediately, or it
- >might run for a few seconds and then bomb.
-
- >I was never been able to resolve this problem. I, too, suspected
- >interrupts from various things, but I added code to the kernel to
- >catalogue and report all interrupts -- nothing had anything to do
- >with the 68882.
- I got responses indicating that is was probably a hardware problem
- on the first TT series. So I contacted Atari and they confirmed having
- the same problem with their Unix V4 implementation. They had a fix for it
- and I hope that I can apply it this weekend.
- Maybe the Amiga has a simular problem!?
- I don't plan to let the problem rest and have a useless coprocessor
- in my system.
-
- >Best wishes,
- >Norm Bartley, norm@enel.ucalgary.ca
-
- I will post the result of the hardware patch. Thanks to every body who
- replied.
-
- To be continued...., Leo.
- --
- Leo Weppelman @ Albert Heijn bv, UUCP: ....!hp4nl!leo@ahwau.ahold.nl
- Winkelautomatisering Internet: leo@ahwau.ahold.nl
- Ebbehout 31, 1507 EA Zaandam. Phone: +31 75 593938 Fax: 351240
-