elwell@osu-eddie.UUCP (Clayton M. Elwell) (06/06/85)
I haven't bought the microcode listing & architecture description for the 68000 from the U.S. Patent Office, but from examination of the Motorola spec sheet, and looking at when signals have to be ready, it looks as though it's clocked by all CLK transitions, not just rising ones. This makes some sense; it means you don't have to run 16MHz-32MHz signals around your board (I've been bitten by that on a 80186--16MHz signals on a wire wrap are not fun...). --Clayton Elwell