SUMMARY: Stack Underflow on a 450

From: Adam Bisbe <bblp_at_bisbe.net>
Date: Sun Dec 02 2001 - 19:53:58 EST
Thank you all.

That's Greg's answer.

On 12/02/01 07:41 AM, Adam Bisbe wrote:
> I have an E-450 with 2 16GB discs, yesterday the machine stop to the ok
> prompt, when I typed ? it answered:
>
> 10000000
> Stack Underflow

The ? forth word expects an address on the stack so it can fetch the word
at that address and print it.  If there's no address on the stack the
interpeter will notice the stack underflow and display that message,
it's not generally harmful.  The ? word is the same as executing the two
words "@ ." ("at" and "dot").  The OpenBoot reference manual at
http://docs.sun.com/ mentions @ (and l@, x@, etc) and uses l? (32-bit
version of ?) in examples but I couldn't find ? or l? in the "memory
reference" section.

> later rebooting the machine I noticed:
> Dec  2 11:33:00 dbcn scsi: [ID 107833 kern.warning] WARNING:
> /pci@1f,4000/scsi@2 (glm1):
> Dec  2 11:33:00 dbcn    Resetting scsi bus, data overrun: got too much data
> from target from (6,0)
> Dec  2 11:33:00 dbcn scsi: [ID 107833 kern.warning] WARNING:
> /pci@1f,4000/scsi@2 (glm1):
> Dec  2 11:33:00 dbcn    Target 6 reducing sync. transfer rate

Which isn't related at all.

> Can someone tell what kind of problem do I have?

Something like: improper SCSI termination, flakey or loose scsi cables,
a flakey scsi target device, etc.


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Received on Sun Dec 2 18:55:18 2001

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