Hey I remember this...
Any disk drive without a track 0 sensor (Apple ][,
Commodore, etc). The
heads bang themselves out of alignment with time.
OPEN 15,8,15,"I0:NEWDISK,ND"
BRRRRRRRAAAAAAAPPPPPPPPP!!!!!!!!!!! (let the record reflect that the email
author made a Sten machinegun noise).
I remember making a timing light for Commodore 1541 drives out of a neon lamp
and a 1N4007 diode, which one would play on the timing marks on the drive
spindle. Then there was a pot you could adjust to change the rate of the
spindle motor.
--
Bill Layer
Sales Technician
<b.layer(a)vikingelectronics.com>