Re: 65816 chip in Apple IIe?

[Bill Bach <bbach@cncdsl.com>]

I had a project based on 65xxx series chips a while back.  At the end, I
had a few 65802 (not 65816) chips rated to 4Mhz.  This chip *IS* perfectly
pin-compatible with the 65C02, so I replaced a few Apple //e CPU's with the
new ones.  Doesn't do much unless you know how to program to the larger
instruction set, and then you can't send those programs to anyone unless
they have the same chip, so I didn't do much with it after that.  I still
have one of these systems running labels in my dad's warehouse...
 Goldstar Software Inc.
 Building on Btrieve(R) for the Future(SM)
 Bill Bach
 BillBach@goldstarsoftware.com
 http://www.goldstarsoftware.com
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Ross Archer wrote:

> Looking at the specs of the 65C816, it looks like it's "mostly"
> pin-compatible
> with the 65C02 processor, but not entirely so.  It looks like maybe it
> might be
> possible to basically unplug the 65C02 from my IIe
> and replace it with the 65816?  Has this been done with any measure of
> success,
> or will I cause a major thermonuclear event by so doing? :)
>
> I'm asking because although I go way back with 8 bit 6502 systems, I
> never paid
> the slightest bit of attention to 65816s. Now for a variety of reasons,
> I'd like
> to "play" with one.  Specifically, uCos-II ought to run very well on
> this CPU
> when in "native" mode...
>
> Cheers.  Any advice apreciated.
>
> -- Ross