Nascom 2 keyboard connector

[Tony Duell]

> I'll hopefully chuck some pics up in a few days; there's not a lot left
> to do construction-wise. Then I get the joy of fixing the machine if
> needs be...

There's a procedure given in the manual, where you add chips a few at a 
time, power up, and test signals, etc.

A word of warning. Firstlu, there's at least one mistake in that 
procedure (one test require a gate from a chip you've not fitted yet!). 
Secondly, one of the counters (IIRC) in the video chain is used in a 
marginal way. IIRC NatSemi chips work there, TI don't (or vice versa). 
The same chip is used somewhere else on the board, I had no end of fun 
tracking down a video problem when I accidentally swapped them round.

-tony