Date   : Thu, 16 Aug 2007 21:44:53 +0200
From   : robert@... (Robert Schmidt-Cisternas)
Subject: Acquired Beeb with symptoms...

Jules wrote:
>Hmm, I just tried a known-good machine with the serial ULA (IC7)
removed, and 
>it operates fine without it. Now, all the circuitry to do with IC35
*only* 
>interacts with the serial ULA - which suggests that if your machine's
still 
>causing problems with the serial ULA removed, then the problem lies
elsewhere...

Thanks - good point!

> Hmm, I think that's a 6850 chip... unfortunately on this machine I
have it's 
> not socketed (perhaps it is on yours).

That's IC4, then.  Mine is also soldered, so I'll leave it for now.

Cheers,
Rob

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