hi.. i have a working 9100a unit and i'm in the UK becasue i delivered dave's unit to him the same time i picked mine up :) i will happily copy disk and whatever t get the other unit running.. we had intended to do this anyhow.. sounds like we have progress.. We got two mainframe units, knowing one was bad, but neither of them were labelled which was which, it was pot luck that i got the worker and dave got the duffer :) heh anyhow.. i think we're also on the case of reading/writing os9 disks as i am anxious to get some programs written on the PC and used on the unit, seeing as the rs-232 seems like its not intended for file transfer... i'm just getting my teeth into asteroids and galaxians right now.. Andy