Re: 65816 chip in Apple IIe?

["Ross Archer" <dogbert@mindless.com>]

"Bill Bach" <bbach@cncdsl.com> wrote in message
3D1BC565.95558CE8@cncdsl.com">news:3D1BC565.95558CE8@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

Okay, thanks!  I kind of figured not.
It just seemed like they went to a fair
bit of trouble to keep the address and
data pins in the same place, that maybe
there was still cause for hope. :)

I may investigate the possibility of an "adapter socket"
yet, with possibly a few gates for clock, etc.,
as AFAIK the 65802 is no longer produced, whereas
the 65816 is still being made by WDC.

Does anybody know where one might find a
schematic of the IIe?

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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
>