KY11 - ever debug one?

[Gooijen, Henk]

> -----Original Message-----
> From: cctalk-bounces at classiccmp.org 
> [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Brad Parker
> Sent: zondag 22 april 2007 2:44
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: KY11 - ever debug one?
> 
> I could swear there was a discussion recently (like in the 
> last week) about 11/34 consoles and KY11 documentation.  Or 
> maybe I dreamed that up.

Yup, but it was only the wiring to the console :-)

> Anyway, it prompted me to try and figure out why my 11/34 
> console was blank.  The serial monitor works fine, as does 
> the cpu, but the "digits"
> in front are blank and only the run and dc-ok lights are on.
> 
> [...snip...]
> 
> -brad

I worked on the M7859, a year ago, so things are hazy already.
See www.pdp-11.nl/pdp11-34a/cpu/options/m7859/troubleshoot.html

I will check this evening if I still have the printout of the
schematics with all kind of notes scribbled on it ...

- Henk, PA8PDP.




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