Looking for 8085a CPU

allison ajp166 at verizon.net
Mon Nov 7 19:57:29 CST 2016

If you were on this side of the pond it would be easy.
The 8085A is a really common part with many vendors and all work.

Also if a different one gets hot (they nominally run warm not hot to the
check to see if there is a bus or address driver shorted or stuck in the
wrong direction.
Make sure the 8085A is the only warm part.


On 11/07/2016 06:32 PM, Adrian Graham wrote:
> Hi folks,
> Still working on this STC Executel and it looks like the CPU isn't too good
> given how hot it gets within a minute or so. The display is the same whether
> there's a CPU physically present or not. I built this circuit to test it:
> http://saundby.com/electronics/8085/freerun.shtml
> Using a 4mhz crystal the address lines are all over the place - I'm using a
> logic analyser rather than LEDs.
> Has anyone got a spare they'd like to sell me? I'm struggling to think of
> something I've got that may have a socketed 8085...

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