Date   : Fri, 17 Aug 2007 09:38:41 +0100 (WET-DST)
From   : pcoghlan@... (Peter Coghlan)
Subject: Acquired Beeb with symptoms...

>
>It's the 6850 ACIA. You can also yank out the ADC (u7002), any speech chips
>(TMS5220/TMS6100), the disc controller (8271), econet (68B54), and still
>have something that'll boot. Note, not all these parts may be present since
>some were offered as upgrades,
>

If you (or someone who got there before you) take out IC78 the 8271 disk
controller, you should close link S9 to avoid generating continuous NMIs
(which if not the original problem, will likely make the problem worse!)
Similarly if IC91 in the Econet department is missing, you should ensure
link S2 is closed. Be sure to open the appropriate link before plugging
in either of these chips though.


                         Regards,
                           Peter.