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 touch) 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. Allison 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... >
