[Coco] Unusual problem

[Luis Antoniosi (CoCoDemus)]

only the grey full height are in fact 35 tracks only. All the others do
support 40 tracks


On Fri, Nov 1, 2013 at 8:50 PM, Christopher R. Hawks <chawks at dls.net> wrote:

> On Fri, 1 Nov 2013 17:56:15 -0400 (EDT)
> Bill Pierce <ooogalapasooo at aol.com> wrote:
>
> >
> > Bill,
> > I think I see your problem right off the bat.
> > While others are talking hardware and solder problems, no one seemed
> > to notice you said you were trying to boot from a 40 trk disk image.
> > From RSDOS (or hdbdos), a 40 trk image will not work. The boot track
> > (track 34) is in the wrong place and rsdos will not find it as it is
> > treating the disk image as  a 35 trk image. I have tried and tried to
> > get someone on the Nitros9 team to make the Nitros9 images in a 35
> > trk disk image as well as the other sizes/formats. This would solve
> > many, many problems people are having trying to boot from the
> > repository images. If you make a 35trk disk image from your working
> > copy then take that into the office and try it, I think you'll find
> > it works. Also, if you are using the 40 trk image from the repo,
> > there are NO 40trk DW images in the repo. All the 40 trk images are
> > for standard (real) drives which again, will NOT work in a 35 trk
> > disk system. So if you stick a 40trk image in dw4, it will start to
> > boot then look to the floppy for it's bootfile then fail.
> >
> > All in all, use a DW boot disk from the repo and cobbler a 35 trk
> > disk while in that system. Copy the CMDS (all will not fit, only
> > important ones like grfdrv, shell etc.) and SYS as well as sysgo and
> > startup to that disk and I think you'll find it works.
>
>         What?? You mean all these years (30) I actually havn't been
> able to boot 40 and 80 track disks with DECB???
>
>         You better look again. Unless you are a Dragon disk, the boot
> track is _ALWAYS_ on track 34 whether it's a 35, 40, 80 track
> drive.(Oh, and it's _ALWAYS_ on the first side.) I haven't had a 35
> track single sided drive in years. And I've been booting OS9 for 3
> decades.
>
>
> Christopher R. Hawks
> HAWKSoft
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