CompuServe Messages

MS: with the 68EC020 it can only access 10megs of memory total, rather MS: than 64megs? that the 'real' 68020 can access. Actually the EC020 has a "24-bit address" for 16-megs of "space", which boils down to 10-megs after ROM, I/O, and other support chips are mappedinto the address space. The EC020 also has certain support lines removed, this preventing the addition of a MMU. This actually makes the EC020 faster, freeing a support cycle(?) for CPU use. The full 020 has a "32-bit address" which allows 4-gigs (4096-megs), although I don't know of anyone that uses that much RAM. — MS: the 68EC040 I think you can get it either without the MMU, or without MS: the FPU, or without either the MMU or FPU (they might have other MS: designations other than EC, I'm not really sure). The 68ec040 has the MMU (or was it the FPU?) removed, while the 68lc040 has both the FPU & MMU removed. MS: Originally the EC stood for Embeded Controller, […] Embedded Controllers are also used in hardware such as printers, intelligent peripherals, and other computerized equipment that uses CPU's but doesn't need the extended "memory managment" or "floating point math" features. Ron. – ap'ing with AP. (Eagles may fly, but weasles aren't sucked into jet engines.)