Re: 1571 images as G64

From: Pete Rittwage <>
Date: Thu, 30 May 2013 13:04:27 -0400 (EDT)
Message-ID: <>
I found a discussion about this on the Kryoflux forums.

-Pete Rittwage

On Thu, May 30, 2013 12:51 pm, Pete Rittwage wrote:
> On Thu, May 30, 2013 12:31 pm, wrote:
>> Still interesting.. in CBM drives we can access half-tracks because the
>> stepper is an 80 tracks one and the DOS moves it in double-steps. To
>> move
>> it in quarter-tracks would require different stepper I believe. Apart
>> from
>> this, if they need a special circuit to move it in quarter-tracks - does
>> it make any sense when the non-modified drive can't access those anyway?
> It's not a special circuit or a mod... it's more that there is no circuit
> there at all to do it for you.  You don't just tell the drive to step up
> or step down like the CBM, you manipulate the magnetic field coils a
> certain way to move the drive head (push-pull electromagnets) purely in
> software on the Apple.  Because of this, you have very free movement
> withing track boundaries.
> -Pete Rittwage
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Received on 2013-05-30 18:01:18

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