help - 11/34 console problem -- first LA output

[Tony Duell]

> > Do you have a logic analyser? If so, then I would try looking at the 8080=
> 
> > address bus. See what bit of the program it's executing, see if it does
> > the right things when you press the keys, etc.
>  =
> 
> I have, it's a Biomation K100-D. When I first set it up Sunday afternoon,

Amazingly that's what I have... I didn't get the pods with mine, but a 
bit of work and some 10124 TTL-ECL translators got the thing useable with 
TTL level signals

[...]

> That depends on the length of the instruction. Anyway, I see the addresses
> 60-110 (octal) in the correct order and see the address jump at 101 to the
> address 335 (a subroutine). I see the complete execution of the subroutine
> and the return. Indeed going to address 105. That means the stackpointer
> and the memory must be OK! ReturnPC stored in RAM, and retrieved correctly.=

Be careful!. I have in the back of my mind the idea that the 8008 has an 
internal (8-ish level) return stack and doesn't use RAM for this. So you 
could still have RAM problems.

-tony