Writing single density disks on a PC?

From: Dwight K. Elvey <dwightk.elvey_at_amd.com>
Date: Mon May 19 15:25:00 2003

>From: "Fred Cisin (XenoSoft)" <cisin_at_xenosoft.com>
>
>Try Hypercross/PC-Xzap from Hypersoft.
>I'd like to hear from anybody who has SUCCESSFULLY used 22DISK for

Hi Fred
 I tried 22DISK for my M20 but it didn't work. The tables
were wrong, as well as that my computer didn't deal
with single density. Since it had no way of ignoring
track 0, easily, I gave up on it.
 I found that the single density,
on track zero, was solved by using the M20 to pre-format
the disk and then used my routines to write the double
density stuff to the remaining tracks. If Geoff has the
same issue, he might be able to deal with the single
density the same way. I found that the first track
being single density was just a boot compatability issue.
The first track would just have enough code to switch
to double density and then the main loader was on
track 1. This meant that the code was basically the
same on all of the track zero's.
 I'd forgotten that the BIOS wouldn't deal with the
single density. I was thinking more in terms of number
and size of sectors.
Dwight


>anything other than CP/M, or used ANY commercial product for SD.
>Yes, Catweasel or Option board THEORETICALLY could do it.
>Posters about any product that "can do it", but don't differentiate
>between "CAN DO" and HYPOTHETICAL POSSIBILITY can go F themseves.
>(During the life of my products, I constantly competed with rumored,
>but non-existent, capabilities of some products)
Received on Mon May 19 2003 - 15:25:00 BST