Re: usb disk controller to read c64 disks.

From: Wolfgang Moser <womo_at_news.trikaliotis.net>
Date: Thu, 22 Sep 2011 22:02:02 +0200
Message-ID: <j5g403$nhh$1@vs5413.trikaliotis.net>
Hi Olaf,

Rhialto schrieb:
> On Wed 21 Sep 2011 at 23:31:28 +0200, Wolfgang Moser wrote:
>> so then get a Panasonic JU-475-4 or -5 drive and file away the
>> mechanical stop a little bit. The rails and other mechanical parts are
>> long enough to allow the head to step back to track -4 (ca. 2.15mm).
> 
> Won't that mean that if you format a new disk on it, it will have the
> tracks on the top offset by (about) 4?

I did not test this yet, but there is still the optical track-00 sensor.
Because I didn't touch it it should be still correctly aligned so that
disks get formatted correctly. The Kryoflux people reserved one of the
lines of their controller to temporarily disable the track-00 signal so
let the drive controller IC "think" that the sensor is not hit yet. If
this line is not active, then the sensor is in fact hit, recognised by
the drive controller and therefore the head is repositioned to track 00.

Does this make sense for you?


Womo

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Received on 2011-09-22 21:00:16

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