19 Jul
2010
19 Jul
'10
1:42 p.m.
In article <BLU145-W4E5759E0F6332DE691D00BABD0 at phx.gbl>,
Randy Dawson <rdawson16 at hotmail.com> writes:
If you mean as opposed to a helical recording (like video tapes, etc),
then it is.
IRIC the Tekky 405x series didn't use any of the standard encodings,
though. They had a 2 coil head that read/wrote 2 tracks at the same time.
A pulse on one track was a '0' bit,a pusle on the other track was a '1'.
Whether simultaneous pulses on both tracks were used as some kind of
marker I don;t know, many otehr similar systems did use that.
oject. He has a 4051. Also a bunch of tapes with
the belt and capstan degr=
ade problem=2C and I mentioned the idea of transplanting the media to a new=
dc300 cartridge.
As I understand it the DC300/DC100 cartridges are a linear encoding
format (according to Wikipedia, anyway). I've also been wondering about building a circuit
that creates fake
analog signals to the existing tape drive circuitry so that you can
"play back" the archived tapes into an existing device without having
to worry about physical media. First I think its more important to
create a device for safely archiving the media, though.
Since the first things that';s done with the analogue signals from the
head is that they're converted into digital pulses, it may be easier to
feed the data in at that point, similar to the flopy drive emulators
9using SD cards, etc) that are around now.
-tony