Finally fixed it! (was: Re: Complete success, OS/8 is up and running :) not so fast...)

Ethan Dicks ethan.dicks at
Mon Jun 18 17:21:48 CDT 2007

On 6/18/07, Charles <charlesmorris at> wrote:
> After intensive head scratching and hair pulling (accompanied by
> appropriate curses and a bit of scope and logic analyzer work ;) I
> finally found the problem with my 8/A this afternoon.

Well done.

> Of course the system now still won't boot (I can hear the drive
> head move, and then the RL02 FAULT light comes on) but it's likely
> the OS/8 image got clobbered when the chip failed and the CPU
> started writing to odd places.

Hmm... I don't think filesystem problems will cause the Fault light to
light up, just problems within the drive.  You may need to trace back
all of the causes that sum up to "Fault" to see what's going on.

> You can't write-protect the pack
> either, since OS/8 swaps in and out frequently to maintain such a
> tiny "footprint" in core.

Unfortunately not.

> Anyhow I'm leaving tonight for three weeks of vacation in sunny
> Crete so it can just wait until I get home!

Kalo Taxithi


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