10 Nov
2007
10 Nov
'07
1:52 a.m.
The tape drive in a 405x predates QIC. The head is
fixed in place and
uses one track for clock and one for data. It is more similar to digital
cassettes than the later QIC drives.
I thought, from a brief look at a friend's 4052 service manual (how I
wish I had a 405x myself...), that it was 2 tracks, a transition on one
is a '0' and a transition on the other is a '1' (And a transition on both
together is a marker?). _Very_ like the BMS digital cassetes I use.
-tony