[Coco] Programming a 68766 EPROM

Bruce W. Calkins brucecalkins at bellsouth.net
Fri Aug 25 21:45:18 EDT 2006

I vaguely remember something about the CoCo ROMs needing +5 volts somewhere
to be read.  No, I can't dredge up anything more at the moment.

I had thought that it would have been just a matter of setting up the
address lines, and the higher programming voltage for the 68766 EPROMs.  I
have a couple I was planning on using for just such a project.

Bruce W.

> I need some suggestions on what kind of programmer I can use to burn an
> MCM68766 EPROM? I already have a Willem (PCB3) programmer which works
> for 27 series EPROMS, but I haven't been successful in wiring an adapter
> it that will work with the CoCos 24 pin format. I can't even get it to
> any of the CoCos ROMs.

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