New commands! HSET MEM copies ROM to RAM and leaves CoCo in RAM mode. HRESET MEM re-enables ROM. (Same thing as POKE &HFFDE,0) In the usual places: ROM: https://dl.dropboxusercontent.com/u/15643089/16k-hdbdw3cc2.rom Patch: https://dl.dropboxusercontent.com/u/15643089/hdbdos-16krom.patch I should stop avoiding the IDE thing, shouldn't I? Juan