6 May
2007
6 May
'07
10:19 a.m.
On 6 May 2007 at 18:05, Philip Pemberton wrote:
By that I assume you mean that they use the index
pulse to mark the sectors,
but ignore the track start marker?
Right.
The ones I'm thinking of are 8" systems, where the drive has separate
outputs for SECTOR and INDEX. There's no compelling reason to pay
attention to INDEX in many applications--and some systems reflect
this.
That was the other thing that I wanted to mention--that 8" drives
separate sector marks from index marks for you. Most do it with a
couple of one-shots--precision timing isn't terribly important, given
that HS 8" disks had at most 32 sectors. Given that, you may want to
make your determination of index and sector marks optional for those
wishing to make use of the drive capabilities.
If you haven't gotten a volunteer for your CW samples, drop me a
private email and I'll make some up for you.
Cheers,
Chuck