26 Nov
2006
26 Nov
'06
6:44 a.m.
hard-sector
certainly. but "high-density"? ISTR N* using Shugart SA400
I'm assuming that you'd want to keep the 8" format. It sounds as if
the NS postdates the old Tarbell controller. IIRC, the Tarbell
didn't support 5.25" drives. index off the
spindle, instead of the photo-cell. But then you have to
line up the rotational position of the diskette every time you insert it.
You could do that, but it might be simpler just to use the photocell
and spit out sector pulses. If there was some concern about long-
term speed variations, one could use a PIC to measure the rotational
speed and generate the pulses accordingly.