[Coco] Re: NitrOS-9 V03.02.01 Release
Frederick D Provoncha
elderpav at juno.com
Fri May 21 21:41:46 EDT 2004
On Fri, 21 May 2004 10:08:11 +0000 (UTC) Rodney_Hamilton at GBRonline.com
(Rodney V Hamilton) writes:
> In article <20040520.230456.1004.1.elderpav at juno.com>,
> elderpav at juno.com says...
> >> The version of DSKINI.EXE probably is OK. There have been issues
> in the
> >> past using 5 1/4" drives that require BIOS adjustments. Since I
> use a
> >> 3.5" drive on both PC and Coco, I've not paid too much attention
> to BIOS
> >> settings. Do a Google newsgroup search for this.
> >> My suggestion would be to get a 3.5" drive and install it on the
> >> By the way, what do you see on your 5.25' drive when you boot
> into OS-9
> >> with a different system disk attempt to read the problem disk?
> The June 8 2003 DSKINI.EXE is indeed the latest version. The main
> from previous versions is that it formats ALL the tracks even if the
> image file is less than the full size. If your 5.25-inch drive is a
> unit, there may be a problem with DSKINI - a note on Jeff Vavasour's
> suggests telling the BIOS it is a 720K unit instead. The 3.5-inch
> should work fine since no track-stepping tricks are needed.
> >I forgot to mention that I already have a 3 1/2" drive installed on
> >Coco. So why am I using 5 1/4" disks? Because I haven't had any
> >using DSKINI to transfer the images to a 3 1/2" disk, either. Even
> if I
> >do succeed in executing the command without getting a write error,
> >resulting disk is unreadable on the Coco. I get "Error 249 - Wrong
> Fred, have you looked at LSN0? The NitrOS-9 DD80 image has the
> byte at offset $0010 set to $07 (96tpi DSDD) but your drive
> for the 3.5 drive is probably still set to DNS=1 (48tpi DSDD). To
> it, try setting the DNS value to 3 (eg: DMODE /D1 DNS=3) and see if
> can now read the 3.5 disk. Alternately, you can patch LSN0 on the
> disk and change the DD.FMT value from $07 to $03 - this is what I do
> my disks so I can read 3.5-inch 720K disks with the default /D1.
> If I change DD.FMT to $02, I can read the 80tk DSDD image in the
> emulators, and even boot from it with my double-sided boot patch.
> >When I boot OS-9 using another boot disk and then analyze the
> >disk, I can DIR the root directory and the DEFS directory, but I
> get a
> >seek error when I try DIR-ing the SYS directory. When I tried
> DIR-ing the
> >CMDS directory, it gave me a 'no permission' error, and when I
> >the attributes, CMDS is listed as a file, not a directory!
> Obviously the
> >disk is garbled, due to a faulty DSKINI operation I imagine.
> >Fred Provoncha
> Again, check the LSN0 settings - it's almost certainly a density
> mismatch between the disk and the descriptor.
> I hope this helps.
> Rodney Hamilton
I will try that and let you know. It'll take a few days though, as I'm in
the process of moving. Thank you for the suggestions!
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