22 Dec
2007
22 Dec
'07
1:28 p.m.
A quick scan of the Qume 242 maint manual from bitsavers shows there
is no separate sector signal.
The Shugart 455/465 manual talks about a combined index/sector signal.
Looking at the northstar controller, they just refer to the incoming signal
as 'hole' and decode it in the controller.