Re: Hardware emulation of 6509 using 6502?

From: André Fachat <*afachat_at_gmx.de*> Date: Wed, 15 Nov 2017 23:27:33 +0100 Message-ID: <15fc1cb6408.2813.b4d1f2b66006003a6acd9b1a7b71c3b1@gmx.de> · afachat_at_gmx.de

Am 15. November 2017 4:16:40 PM schrieb smf <smf@null.net>:

>
> On 15/11/2017 14:06, Gerrit Heitsch wrote:

>>> Conventiently that covers the c64/plus4/c128, so as long as the
>>> undocumented opcodes are stable across all three then they are safe
>>> to use no matter what process the chip was made with.

> Besides, the 65c02 isn't only incompatible because of undocumented
> opcodes. There were a few other changes too.

Ah sorry because of the mentioning of Rockwell I got the idea of the CMOS 
part. But I see it's the NMOS with the undocumented opcodes that is the 
problem. And of course that isn't produced anymore.

Thanks
André

       Message was sent through the cbm-hackers mailing list