On Fri, 20 Nov 2009, Brent Hilpert wrote: > The Osborne book lists 9 variants: > 65x2 x=0|1 > 65x3 > 65x4 > 65x5 > 6506 And there's the 6500 (yes, '00'). It's a 40 pin microcontroller, and it was used eg. on Seagate ST-225 drives. Christian