[bcsco]

I’d be interested. Built some PC’s back in the early 90’s, thought about programming but took classes on networking instead. It’d be fun to do.

[Bobalu]

If I end up doing this it will be about
Programming this particular controller in C
and assembly. It runs at 16.5mhz without a crystal
and at up to 20mhz with one. I never use a crystal
since it costs you 2 I/O pins.

This processor has internal RAM, EPROM and flash memory. It can easily communicate with a PC using USB. It's a great chip for beginners as it's so cheap and can do so much.

I usually get them 100 at a time and they cost about 1.25 each. I buy from Mouser.com but lots of people stock them.

Here is the pdf datasheet

I use these little processors to build hobby type fun projects. But they can be called on to do serious work as well. It's basically a whole computer for a buck and a quarter.

The compiler is free and of excellent quality, as is the free IDE.