[Techtoolslist] Undocumented Errors: 9010A with 6800 pod - error message on Bus Test "ADD ERR @ 0000-LOOP?"

[William Stillwell]

Yeah, I have had that before, seems when the data and address bus are
bridged you get a goofy error.

William Stillwell




On Fri, Jan 10, 2025 at 7:24 PM John Robertson via Techtoolslist <
techtoolslist at flippers.com> wrote:

> Hi folks!
>
> This is a new error message on me, and I am having a problem figuring
> out exactly what it means. No reference to it is the 9010A nor the 6800
> pod manuals under Bus Test - or any other test. Perhaps this was an
> added treat for version 3A?
>
> Note that the R/W line is not tied low or high, all address lines seem
> fine. Pod reads 0000 just fine, but if I try to Write AAh to 0000 I get
> this error msg too, but not if I write 55h. Curious I then try writing
> 01h, 02h, 04h (all good), 08h - nasty error message! Then again with
> 10h, 20h, 40h, and 80h - all good. The problem turned out to be a tiny
> solder bridge between D3 and A2! Pity the Fluke couldn't say anything
> about that then this cryptic message.
>
> This is the second undocumented error message I've found - we need to
> list them somewhere...I'll put them on the Fluke page on flippers, and
> folks are welcome to publish elsewhere although I do like a wee note
> that it was found on TTL.
>
> Thanks!
>
> John :-#)#
>
> --
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