home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!gatech!destroyer!cs.ubc.ca!yukongold.cs.ubc.ca!not-for-mail
- From: phillips@cs.ubc.ca (George Phillips)
- Newsgroups: comp.sys.tandy
- Subject: Re: Model 1 cassette tape backup method?
- Date: 11 Jan 1993 22:36:53 -0800
- Organization: Computer Science, University of B.C., Vancouver, B.C., Canada
- Lines: 27
- Distribution: na
- Message-ID: <1itou5INN8r8@yukongold.cs.ubc.ca>
- References: <1993Jan7.232950.13623@netcom.com>
- NNTP-Posting-Host: yukongold.cs.ubc.ca
-
- In article <1993Jan7.232950.13623@netcom.com> lachman@netcom.com (Hans Lachman) writes:
- >I have an old TRS-80 Model 1 with cassette tapes. I would like to
- >keep this system well-preserved so that 50 years from now I can
- >show it off as a working antique computer. I am concerned about
- >deterioration of data on cassette tapes. Is there a good way to
- >back up these tapes? I would perfer a method whereby the computer
- >reads the data and makes a fresh recording on a new tape (as opposed
- >to tape-to-tape recording, which would carry forward any deterioration
- >thus far).
-
- If you have access to a computer which can record sound you could use it
- to make a digital copy of your tapes. The sampled file size would not
- have to be too big as a 2 Khz sampling rate would be sufficient. Each
- digital copy could be verified by playing it back to tape and loading
- it on your TRS-80. Built-in system software is more than up to the
- task on any PC or UNIX workstation I can think of.
-
- But if you're going to digitially copy the tape, you may as well go
- all the way and save a bit-for-bit (or even byte-for-byte) representation
- of a tape file on a disk. Getting the data off the tape may be a bit
- tricky. I did something like this on my old Model III TRS-80 by writing
- a tape loader which dumped files from the tape into memory and then
- out the RS-232. If you have some programming experience it shouldn't
- be hard to take a digitally sampled version of the tape file and convert
- it to a decoded bit stream. Converting bit streams back to audio format
- should be easy enough too (especially if you get them via sampling), but
- heck, you've got 50 years to figure that one out fully.
-