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- Newsgroups: comp.unix.bsd
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!Sirius.dfn.de!chx400!bernina!torda
- From: torda@igc.ethz.ch (Andrew Torda)
- Subject: Fixed: Runs at 8MHz, Crashes at 33MHz, 386bsd
- Message-ID: <1992Sep8.070731.21159@bernina.ethz.ch>
- Summary: buy faster memory
- Sender: news@bernina.ethz.ch (USENET News System)
- Organization: Computational Chemistry, ETH, Zuerich
- Date: Tue, 8 Sep 1992 07:07:31 GMT
- Lines: 41
-
- Some time ago, I complained with the following problem:
-
- At 8 MHz, my machine appears perfectly stable.
- At 33 MHz, I get repeated trap type 12 panics.
-
- What can be dependent on timing like this ?
- If there are any suggestions as to where I can insert
- debugging lines ?
-
- I am not sure if this particular panic (trap type 12) holds all
- the answers. The machine (at 33 MHz) has often done a
- crash/reboot and wiped the errors off the screen.
-
- Machine details:
- 386 clone (Blackship), no maths chip, 8M memory
- ATI motherboard (ATI-386/B2-33, 64K cache)
- AMI BIOS (04/09/90)
- video: ET4000 based, DFI VG-5000 with 1 Mb
- pc0 <color> at 0x60 irq1 on isa
- com1 at 0x3f8 irq4 on isa
- com2 at 0x2f8 irq3 on isa
- wd0 (MAXTOR LXT-213A> at 0x1f0 irq 14 on isa
- fd0 drives 0:1.2M, 1: 1.44M at 0x3f0 irq 6 drq2 on isa
-
- The most concrete suggestions were to either add wait states or buy
- faster memory. Couldn't add any more wait states, but I managed to
- swap 8Mb of 80ns simms for 70 ns simms.
-
- Instantly, I could rebuild kernels or run my little crash program
- which simply allocated ever increasing amounts of memory and scribbled
- through it.
- The peculiarity is that with the old memory, I had been able to run
- dos, windows in enhanced mode and even SCO unix.
- It would still be nice to know what the cause is and why 386bsd
- provokes the problem.
-
- Thanks to several, especially forsyth@minster.york.ac.uk
- -Andrew
- --
-
- Andrew Torda, Computational Chemistry, ETH, Zurich, torda@igc.ethz.ch
-