Messages in this thread | | | Date | Mon, 14 Sep 1998 19:16:02 +0200 (CEST) | From | Geert Uytterhoeven <> | Subject | Re: NEWSFLASH! Linux ported to Commodore VIC-20!! |
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On Mon, 14 Sep 1998, Neil Conway wrote: > Anders Melchiorsen wrote: > > Neil Conway <nconway.list@ukaea.org.uk> writes: > > > Hmm, quickndirty calc for 90 minute tape at 64kbits =40megs or so. If > > > you can only get 32kbits then you still get 20megs... The sound > > > engineers among us can no doubt confirm bandwidth and S/N issues, but I > > > would have thought that at least 32kbits would be doable with a little > > > error correction ? > > > > So a 4 hour video tape could carry like 60MB if your data is correct. > > > > > Maybe this isn't such a crap idea after all ;-)) (I still haven't > > > bought a backup device for my new PC). > > > > If your numbers are anywere near correct (others have quoted values of > > 1200 or 2400 bits per second, but these are for the ancient devices > > from 1982 or so) I think I would actually be interested in such a > > driver. I also have no backup device and floppy disks are a nuisance; > > but if I could get just the core of my system backed up rather easily > > (though slowly) I would probably consider doing it. > > Hmm, well if you only use the AUDIO input to your video recorder then > yeah, I guess you would get something of the order of 60MB on a 4hr > video tape. However, as you may know, cards already exist to let you > store data on the video portion of a video tape (rough cost is US$50) > and the bandwidth for this is obviously WAY higher (I seem to recall > claims of a couple of gigs per tape but don't quote me).
These devices exist since ages. For Amiga, you had a cable that connected to the video port (for writing) and the serial port (for reading). The actual hardware was next to nothing (a TTL IC and some capacitors and resistors).
> "Danmere Backer" is one such device whose brandname comes to mind, but > I've never used one. > > As for my figures, well they're a guess, but hey, if we can get 33kbps > down a phone line, then I'll bet my ass that a decent tape recorder > can't be far behind (and probably a LOT better).
What about DAT? :-)
Greetings,
Geert
-- Geert Uytterhoeven Geert.Uytterhoeven@cs.kuleuven.ac.be Wavelets, Linux/{m68k~Amiga,PPC~CHRP} http://www.cs.kuleuven.ac.be/~geert/ Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium
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