Re: 65c02 in an Apple II+? Different 65c02s

[et472@FreeNet.Carleton.CA (Michael Black)]

Dosius (steve@dosius.zzn.com) writes:
> dempson@actrix.gen.nz (David Empson) wrote in message news:<1g0v3of.1t48yflaetc96N%dempson@actrix.gen.nz>...
>> Dosius <steve@dosius.zzn.com> wrote:
>> 
>> > dempson@actrix.gen.nz (David Empson) wrote:
>> > > The Rockwell R65C02 instruction set is a superset of that used by the
>> > > WDC 65C02 (and clones thereof).  It should be perfectly capable of being
>> > > used in an Apple II and will run all software which expects a "standard"
>> > > 65C02.
>> > > 
>> > > The Rockwell variant adds 64 extra opcodes (all hex values x3, x7, xB
>> > > and xF) which deal with manipulating or testing individual bits in zero
>> > > page locations.
>> > 
>> > Hm, is the R65C02 compatible with the G65SC02?
>> 
>> I don't know who makes hte G65SC02, but as far as I am aware, there are
>> only two fundamental variants of the 65C02:
>> 
>> - The original one from Western Design Center (and clones thereof, such
>> as the GTE).
>> 
>> - The Rockwell R65C02.
>> 
>> The latter's instruction set is a superset of the former.
>> 
>> Any other brands should be a second source of either of the above, and
>> are most likely to be identical in functionality to the WDC 65C02.
> 
> *cracks open the case of his Platinum //e*
> 
>    GTEu
> G65SC02P-2
> CP300008P
>    8643
> 
> The SC02 had bit-banging ops (BBS1, etc), which the C02 didn't, AFAICT
> (http://www.6502.org and elsewhere).
> 
> -uso.

Something like that is what I'm remembering.  It struck me as odd
at the time that there were two variants, and neither had all the extra
instructions.  

  Michael