10 Nov
2007
10 Nov
'07
2:02 a.m.
On Sat, 10 Nov 2007, Tony Duell wrote:
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.
Yes, that's how it is described in the 4051 service manual. BTW the IBM
5100/5110 tape drive has a two tracks head, too. The difference is that
one head is used for header records and the other for data records. They
are used alternatively.
Christian