24 Aug
2004
24 Aug
'04
4:24 p.m.
----- Original Message -----
From: "William Maddox" <wmaddox(a)pacbell.net>
Years ago, I owned a data cassette drive made by a
company called National Multiplex, presumably long
defunct. It was obviously a modified audio cassette
recorder, but in which the internal electronics had
been completely replaced. Unlike the prevailing
standard for cassette-based data storage on micros
in that day, this drive used saturation recording
(NRZI, I believe) instead of a modulated audio
carrier.
I wonder if it is functionally comparable to some Philips cassette drives I
have. I've been looking for info on the drives, but as yet to no avail. The
onlythings I can remember, is that they used serial I/O, with 6V logic.
There are two versions; one where the cassette is pushed in, much like a
3.5" floppy, and one where the cassette is mounted just like the old
Exabytes 8200's.
I have two or three drives, but all rubber bands have dissolved.
Nico
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