OK, my curiousity is piqued. What is the HC in MC68HC000 chips? The one I have is on a DEC RF31 disk drive controller. Paul On Tue, 25 May 1999, Pete Turnbull wrote: > On May 25, 21:47, Tony Duell wrote: > > Subject: Re: 68020 vs 68EC020 > > > > > > An A1200 question: what's the difference between the 68020 and 68EC020? > > > > I believe the 'EC' version is for Embedded Control, and lacks some of the > > functions of the plain 68020 (probably MMU-related or something). > > I'm not sure of the other details, but "EC" = "Embedded Control", as you > say. According to my Motorola cribsheet, it's a 68020 with only 24-bit > addressing, without the dynamic bus sizing, ands restricted speed range. > It does have the co-pro interface, though, and probably most if not all of > the instruction set (the crib sheet doesn't get very detailed). > > -- > > Pete Peter Turnbull > Dept. of Computer Science > University of York >