[sdiy-interim] EPROM Armageddon?

[David Brown]

I just picked up a Data IO 29B with a Unipack 1.  It's been so long 
I've forgotten how to really use it but figured it would be useful some day.

I designed a three part harmony doorbell in 1976 and it's programmed 
in a 2708.  It died one day and I was sure it would be the eprom, but 
it was the electrolytics in the power supply.  I managed to save a 
hex dump just in case but it's been going solid and powered on for 30 
years straight.  I ought to calculate how many times the 8080 has 
gone through the check doorbell switch routine in all those years.

Dave 


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