CompuServe Messages

80×86 is more complicated as an 80386 can run as a 386/286 and 8086. Addressing changes in each so an program written for an 8086 has to be run in 8086 mode etc. 68060 runs in one mode, 68000/020/030 & 040. The only problem is with mmu's as they aren't compatible. There is no reason why you have to write software that will only run on an 020, there are some instructions on the 020 and up that can sometimes give you speed benefits. But you can just write 68000 code if you want to. Phill