*BSD News Article 14654


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Xref: sserve comp.os.386bsd.questions:1720 comp.os.386bsd.bugs:517
Newsgroups: comp.os.386bsd.questions,comp.os.386bsd.bugs
Path: sserve!newshost.anu.edu.au!munnari.oz.au!spool.mu.edu!agate!ames!cae780!bkp
From: bkp@csi.com (Brian K. Pheiffer)
Subject: silo overflows and failed fixes -- trying syscons-0.2 and trap 12
Message-ID: <1993Apr18.202524.12821@csi.com>
Keywords:  syscons-0.2,CGD,com-beta.0.2.1,silo overflow
Organization: Comdisco Systems Inc., Foster City, CA
Date: Sun, 18 Apr 1993 20:25:24 GMT
Lines: 30

I've been running a 486DX (with patch level 0.2.2, Orchid Prodesigner
IIs, 3com 3c503 at 0xDC000, com1, com2, com4 at irq 5, 32Mb, Maxtor IDE
230 Mb) with no problem except silo overflows.  I've been trying 
different ways to fix this problem but keep hitting a wall.

I first tried Gene Stark's mods to CGD's comkit.  This booted and
worked fine except I wasn't able to use my com ports *at all*.  Every
command (tip,cu,kermit) would hang trying to open the port.

I saw that his was based on patchkit 0.2.2 + syscons-0.2 so I tried
installing syscons-0.2.  I rebuilt the kernel and right before the
fsck check on reboot -- the kernel paniced with:

| trap type 12 code = fe010002 eip = fe0103d5 cs = 8 eflags = 10206 \
| cr2 2726148 cpl 4040
| panic: trap
| hit reset please

So that wasn't optimal.  I also tried CGD's com-beta.0.2.1 patches,
but they also had the same problem as Stark's: I couldn't open the
devices.

I'm fairly sure the source tree was clean before trying each of these
three senarios since I rebuild a plain kernel between each.

All I'm trying to do is fix the com port silo overflow problem.  Any
suggestions on which approach or what I could try next?

Brian Pheiffer
bkp@csi.com