> User programmable
> 512 x 12-bit program ROM

Interesting... "User programmable"...while having ROM memory? So if I buy one
from a catalog, I'll probably get it with a mask ROM for some other device,
who knows which, and it will be pretty much unusable. Nice :-)
And, the other company which had them marked as only "PIC1650"...who knows
what they are, but probably still some other ROM.

> Read/Modify/Write on the I/O pins) and the PIC1663, PIC16C64, PIC1665
> that are 64-pin with external ROM for development and prototyping.

Now I could say, WOW! :-) If only I could find some of them nowadays...

> If someone is interested I can try to scan some pages from the databook
> and put them on the web.

I could even pay you for xeroxing the pages and sending them to me...

> Is there someone on the list that happen to have (and wishing to sell,
> even surplus) some AY-3-8500, AY-3-860x or AY-3-8765 (they are listed in
> the book)? These are the chips for the (very) old videogames like: balls
> & paddle, roadrace, motor cycle, etc. I would just *love* to have one to
> build an unit...

I found AY-3-8500 in one repair catalog. No such luck with the others, though.
The chip is listed with a price of 38 FIM which is something like $7.