help - 11/34 console problem -- CNTRL key behaviour

[Gooijen, Henk]

Tony wrote: 

> > Ok, so the CNTRL key behaviour analysis is a good point
> > to start with.
> 
> Well, it's a definite fault. I would guess the firmware is 
> doing the wrong thing (I can't see how a hardware fault in 
> the keyboard or display could do this). 
> 
> > But I will first inspect the two RAM chips!
> 
> What are the RAMs? From the description, they sound like the 
> little TTL RAMs that DEC also used for register storage on 
> some of the '11 CPUs
> 
> -tony

If my eyes read it correct, the RAMs are DEC 85S68. A Google
search shows that it was made by National Semiconductor and
that it is a 64-bit static RAM.  My eyes are still good :-)
I did not find a datasheet, unless you order and pay for it!
The schematic is clear enough to figure things out ...

- Henk, PA8PDP.

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