Re: Apple IIc disk drive pinout confusion

[Kevin Dady <kevin@hackaday.com>]

Thanks all

I hacked up a printer cable with a hacksaw and rewired it, the other
end is on a little breakout board I made, I was going to bus the 12v
connections together, and I am glad I second guessed it cause sending
+12 down a -12 line would have been real bad.

Another question, maybe to save me a little bit of time, what voltages
do the stepper motor phases operate at? I will be getting the
technical manual tonight, but I have to do it in my sleep as I just
dropped to the lowest teir comcast service, and it makes downloads a
priority ... thus hosing any access for the entire house while
downloading anything, and a couple hundred megs takes a min at 1.5mbs

I do plan on hooking all this up to "proper" test gear but my scope is
almost as old as the //c (1988) and thus does not save a huge amount
of info in its digital storage mode, and my LA is just a slapped
together AVR + software thing I would rather not send negative or
excessive voltages to as that would release the blue smoke from its
buffer chips (and of course a meter is not going to be very accurate
at the speeds these things run at).

The info I have on hand is a photocopy of chapter 9 out of
"understanding the apple II" (minus page 9-7) and while it does a good
job in explanation its not 100% in its facts.

Thanks again