emulating an Apple II+ in an FPGA

Brian Lanning brianlanning at gmail.com
Wed Jan 6 10:52:08 CST 2010

On Wed, Jan 6, 2010 at 10:27 AM, Keith Monahan <keithvz at verizon.net> wrote:
> I've got to subscribe -- sounds like a neat article.  I recently subscribed
> to Nuts and Volts, and I like the fact that you get access to all of the
> back issues back to like 2004 for free included w/ your subscription.

I was an EE major my first year of college before switching to CS.  It
was probably a good career move, but I miss playing with electronics.
I really don't need another hobby though.

> The whole retro-computing thing in an FPGA floats my boat.  Very neat stuff.
>  Lots of people have been reverse-engineering or duplicating the
> functionality of these old custom chips which is fantastic.  Plus I love how
> it scales.  Got two custom chips? 10 custom chips?  The logic will fit into
> a small FPGA.  And then throw the soft-core processor onto the same FPGA and
> you have the system-on-a-chip idea.  And there's little wiring to do because
> everything is internal.

That's how the minimig is.  Someone reimplemented the amiga custom
chips and a 68000 in an FPGA.  I believe the new c64 chameleon works
like this also.

> As far as less time-consuming goes, I wouldn't count on it.

I agree.  There's so much to learn and nowhere near enough time.  I'd
like to learn to weld also, but that's not likely to happen any time
soon either.

I'll probably stick with tinkering with 6502 machine language.  At
least I'm already equipped to do that.  The learning curve should be


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