68K Macs with MacOS 7.5 still in production use...

Some can. The TMS 9900 is indisputably 16-bit; it even has 16-bit memory addressing, in addition to 16-bit registers, a 16-bit ALU and 16-bit internal datapaths. For that matter, the CRU is 16-bit, too. The PDP-8 and Intersil 6100 had 12-bit registers and 12-bit addressing, at least natively. If you ignore address bus size, lots of the 8-bits are clearly 8-bit, like the 6502 and the Signetics 2650, which have 8-bit registers and 8-bit ALUs and no doubling or splitting. I'm not aware of an 8-bit with an 8-bit address bus [that isn't multiplexed], though I'm sure there's some wacky microcontroller variants around that qualify. And then there's the MC14500B ... I think this only starts getting blurry when you get above the 8-bit threshold. "No, honey, that's *not* his trunk." -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Jesus loves you, and I'm trying to. -- Jack Thompson -----------------------