Grrr - !%#*^@# Kaypro!

[Dwight K. Elvey]

>From: "Fred Cisin" <cisin at xenosoft.com>
>
>On Wed, 3 Aug 2005, Dave Dunfield wrote:
>> Tried ImageDisk on some Kaypro disks this morning...
>> Buggers recorded side1 as additional sectors of side0.
>> The different set of sector numbers didn't bother
>> ImageDisk, but it had a bit of a tantrum with the Head
>> ids which didn't match the physical head selection.
>
>Quite common :-(
>765 insists on accurate sector headers;
>WD 179x can ignore the head # field in the sector headers.
>The Kaypro won't even mind reading/writing a disk,
>if you FORMAT it with a 765 using valid sector headers!
>
>
>> I can imagine that someone somewhere does weird things
>> with the Cylinder ids on a track as well ...
>
>Rare.  I've only seen it a few times.
>

Hi
 At least for Dave's setup, he could get by with
a bypass switch on the head selector. It is always
funny what different setups have done. At least there
is a potential bypass for this one.
 I'd guess the fellow that wrote the driver for the
Kaypro didn't have a problem so he didn't notice the
missing head information in the sector header. He
may have thought the controller took care of this
somehow. I know when I've fiddled with the disk controller
directly, it isn't always clear when and where
each register takes effect. There are a few places
that it seem that there is redundant information.
Dwight