10 Nov
2001
10 Nov
'01
11:25 a.m.
On Thu, 8 Nov 2001, Tony Duell wrote:
No, but as I clearly stated, in my experience there was never any reason
for NEEDING one. I've never had to align an Apple ][ disk.
As far as I
know, there is no procedure in the Disk ][ manual for aligning
a drive, and as far as I know, there is no reason for needing one.
There is no procedure in PC user manuals for aligning the floppy
drives. Are you saying such a procedure does not exist? I have the
service manuals for the Teac drives used in my PCs and they include
alignment procedures. Anyway, look at the schematic on page 146 of the Apple
DOS manual
(Circuit Schematic : Disk II Analog Board). TP8 and TP9 are the points
to connect a differntial-input 'scope to (the outputs of the read
filter, as usual). Pop in an alignment disk, move the head to the
correct track, turn the stepper motor to get the right catseye
pattern.
Cool. I'll keep this info handy in the rare or unlikely event that I ever
need to do this.
The Apple ][ disk mechanism is solid.
Sellam Ismail Vintage Computer Festival
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