On Fri,
20 Nov 2009, Brent Hilpert wrote:
> The Osborne book lists 9 variants:
>  65x2  x=0|1
>  65x3
>  65x4
>  65x5
>  6506
>
>            
 I'p pretty suee I've seen a 6507, at least in a databook.
And the 6509
 was a Commodore-special with a built-in MMU sicruit used in the PET II
 (P500 etc).
        
  The 6507 was used in the Atari VCS (2600).  Basically a 6502 limited to
 an 8K address space, and in a smaller (28-pin?) package.
 - Josh