[sdiy] OB8 assistance needed

[The Old Crow]

  Offhand dont-have-an-OB8-but-steeped-in-8bit-hardware-lore guess:

  Bad address decoder.  Similar thing happened to a Prophet-5 I 
overhauled.

Crow
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On Tue, 1 Feb 2005, Cary Roberts wrote:

> So anyone with an OB8 and an oscope care to look at pins 2 and 9 on U58
> and verify that they are only going low for one period as pins 5 6 12
> and 15 are?
> 
> Oh yeah, and then tell us what we need to look at next.