Re: ADT - at a loss...

["Jayson Smith" <nospamratguyspambegone@nospamplease.bellsouth.ihatespam.net>]

Hello,
I have a thought on this.  I was having similar problems, disks transferred
okay but wouldn't boot.  Here's what I found...
The volume number.  On most newly formatted disks, this is 254.  However, on
some disks it's different.  This number is encoded into every sector of the
disk! which makes it a pain to change once it is set.  A DOS made to boot
one volume won't boot when it's on a disk with a different volume number.
Thus, if you have a disk image with, say, volume number 026 and you transfer
that image to a disk formatted with volume number 254, then the DOS on that
disk won't boot, as it's expecting 026 but getting 254 instead.  The VTOC on
track $11, sector $00 contains a record of the disk volume number.  However,
DOS doesn't use that when it does a catalog, it looks at the raw nibbles
instead.  Aparently some emulators make every disk image look like volume
254, so other volumes won't boot.  I know of one emulator which aparently
looks at the VTOC and gives the emulated disks their proper volume numbers.
The seventh byte of the VTOC gives the disk's volume number.  Look at that
to find out the volume number of the disk image you're transferring.  Then
look at the volume number of the floppy onto which the image is to be
copied.  A simple 'catalog' is good enough on the real Apple.  If they
differ, reformat the floppy to have the proper volume number.  To do this,
from Applesoft with DOS 3.3 loaded, type
inithello,vxxx
where xxx is the volume number.
Hope this helps!
Jayson.

"Craig Bower" <to.email.me@post.a.request.message> wrote in message
news:hH6ud.38471$6f6.32324@edtnps89...
> Hi All,
>
> I'm at a loss.  For the past week or so now, I can't get ADT to transfer a
> working floppy.  It worked absolutely fine for me before and I haven't
> messed
> with anything.  It'll send the "meat" of the disks, but apparently will
not
> send a
> proper DOS of any type over the wire ... What gives?  Anyone else run into
> this problem before?
>
> Any help, much appreciated ...
>
> Later,
> Craig
>
>