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frank

wrote:
The EPROMs are the 2716 so I had better check.

also be aware that one manufacturer (I think Texas Instruments) made a 2716
variant that needed 3 supply voltages instead of only +5V as all the other
variants. If I recall correctly, those where the TMS2716. So not all "2716"
are made equal.
I have several programmers that can handle the single supply 2716 and none
that can work with the TMS2716 without an adapter to add the other power
rails.

Keep your eyes out for a UV EPROM eraser.
If you're ever gonna do anything with those bits you saved,
you're gonna need one.
I don't suppose a UV LED would work, would it? Or what about leaving
the EPROM in direcr sunlight for several hours?

sunlight never worked in decent times for me (and also the part gets really
hot most of the times). When I was really young and couldn't find a real UV
tube, I had good success with "black light" tubes with exposures of a few
hours or even regular fluorescent tubes with exposure of several hours.
Real UV tubes are easy to find nowadays but never ever stare or look at them
even for a few seconds. I recomend getting an EPROM eraser with a lock
sensor that can cut the power when you open the lid.
HTH
Frank IZ8DWF