[sebhc] Access to the SEBHC archive

Dan Lanciani ddl-cctech at danlan.com
Tue Aug 31 22:35:01 CDT 2004


"Dwight K. Elvey" <dwight.elvey at amd.com> wrote:

|Hi Mark
| It appears to be the same. At most, it might include
|different interleaving. I expect to look at it tonight
|to check it out. I don't think the sectors of HDOS were
|physically interleaved

They were not interleaved; however, some versions of the driver did
offset sector 0 on each successive track so that spiral reads did not
miss a rotation each time.  As with any physical sector manipulation,
none of this matters to images.  It's only logical interleave (where the
driver knows a mapping between real sector numbers and those in the
headers) that causes problems.  As far as I know, this was never done
on H17-style disks.

I've now uploaded the three CP/M distributions and my collection of HUG
disks (some of which probably duplicate what is alread there).

			Dan Lanciani
			ddl at danlan.*com
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