I've built an in-circuit serial programmer out of
the normal programmer I use.

My programmer is a cheapy (about $50) "Dak-kit" programmer,
comes as a kit, but you can assemble the kit in an hour or so.

It plugs into a parallel port on a PC.

It actually only takes 4 lines (gnd, +5, a control line, and the +13 programming
 voltage)
to program. I've got a DIP adapter with a cable for these four pins,
and a connector that matches my device's ICP connector.

This has one extra advantage - I have a little scrfipt that runs the programmer
code. It also keeps a count. My theory is that I'll have a check - the number is
 245,
but I have 246 boards in the "done" box, I have a problem.
Nice to do but not done yet would be a check - if it's already got code in it,
blow a whistle.

Consider adapting a commercial programmer. The Dak-kit one is nice because
the kit comes with an article about how it works (it was apparently a
hobby mag project originally), which makes it easier to figure out where
to tap into it.

I don't have contact info for Dak - kit, but can give you name of a
retailer that has them in Vallejo, CA

--
Anniepoo
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