PANICS on Xenix 2.3 and Tandy 4000

[Mark J. Bailey]

Does anyone know where Panic error codes are documented?  I am having
a recurring panic (nightly):

kernel: PANIC: General Protection Trap

The error code is '8'
The pc register is at: 0020:0000001C

This is happening every night, and sometimes thru the day.  It has the
same values EVERY time.  I know that General Protection indicates a 
hardware fault, but where?  The pc value points to a "start" routine
in the kernel in segment 0020:00000000.  Does anyone know how I can
go about analyzing the data I am getting from the error messages to 
help determine the culprit.  I swapped out my EGA board and am planning
some memory tests.

The only thing the manual tells me is that it points to hardware fault.
I saw a discussion in comp.unix.xenix a month or so ago about locating
the routines in the kernel.  But "start" doesn't tell *ME* anything.

If anyone knows how I might narrow down my search, I would be greatly in 
your debt!  This is really starting to bug me!  By the way, the problem
started *AFTER* we replaced a defective hard drive with a new one, although
I cannot immediately see why a new harddisk would be the problem.  We
are using a Data Technology RLL 2-harddrive controller on the Tandy 4000.

Any ideas?  You can email me responses to "mjbtn!root at killer.Dallas.TX.US.

Thanks in advance!

Mark.

-- 
Mark J. Bailey                                    "Y'all com bak naw, ya hear!"
USMAIL: 511 Memorial Blvd., Murfreesboro, TN 37130 ___________________________
VOICE:  +1 615 893 4450 / +1 615 896 4153          |         JobSoft
UUCP:   ...!{ames,mit-eddie}!killer!mjbtn!root     | Design & Development Co.
DOMAIN: root at mjbtn.MFEE.US.TN                      |  Murfreesboro, TN  USA