Using audio cassette

Hello I am a new member of the list in digest mode. I have read quite a bit about the early homebrew computer club days and processor techniques. I am currently designing my own computer and want to come up with a easy cheap method of mass storage. I have been thinking about hacking a tape recorder's read/write/erase heads and support equipment into my computer. I would just make a small modem thing to turn my data to sound and record it on the tape. Using a 90 minute tape, with a 10 second sector size, I would put a File allocation table at the start of the tape and that would tell the machine where to go to get a piece of data. Has anyone experimented with this sort of set up? I figured on audio tape because they are small, robust, and cheap. The computer will only be 16-bit so I don't think the speed of the storage would be a problem as my files won't be that big. It's got to be better than paper tape anyway. BTW, would anyone happen to know where I could find circuit diagrams/logic diagrams for either the PDP6 or PDP10? Thanks, David P.S. Could you please CC' your response to me? Otherwise I won't see your replies for a week... :-) -- David Findlay ---------- Email: david_j_findlay(a)yahoo.com.au Homepage: http://users.bigpond.com/nedz/ Segmentation Fault. (Core dumped)