On Apr 9, 6:26 pm, Mike Willegal <m...@willegal.net> wrote:
Hi Michael,
Are you sure about the analog recording thing? I was speculating that
whole track was simply written with some repeating pattern like 1s and
0s. Last night I was looking at the signals coming from a regular
formatted disk and it shows many of the same patterns that are seen in
service manual, with a lot of added noise and jitter. I figure that the
noise and jitter came from the sector headers and actual data not being
a consistantly repeating pattern.
Regards,
Mike Willegal
Michael J. Mahon wrote:
Mike Willegal wrote:
Hi Tom,
Perfect, just need to find or make a good alignment diskette.
Finding may be easier--it's an analog recording!
-michael
NadaPong: Network game demo for Apple II computers!
Home page: http://members.aol.com/MJMahon/
"The wastebasket is our most important design
tool--and it's seriously underused."
The cats-eye signal was written on a floppy by a machine that had a
wobble between tracks 15 and 17 (or whatever two tracks) and that way
you had a perfect sine wave on your scope on track 16. As I recall
Dysan charged $50 each for them floppies back in the late 70's early
80's. I wore out and messed up a few of them.