[Coco] NitrOS-9 on a 128k Coco-3

[Gene Heskett]

On Wednesday 18 June 2014 17:33:10 Kandur did opine
And Gene did reply:
> Robert, I don't have DW, yet.
> None of the xmode /term commands worked,
> these made no changes in columns or colors.
> The display 1b xx xx commands worked.
> http://qdv.pw/coco/blog/2014/06/18/boot/
> Ok, will check out dEd, that's next.
> /d1 is a Panasonic JU-475-4, it works fine in a PC as a 1.2 MB drive.

Then it is set for a 500kb data rate, minor detail, but much more 
important, 360 rpm.  Your 80 track 720k disk is a 250kb data rate, and 300 
rpm.
The JU-475 has jumpers for the disk speed switch, but I do not recall its 
name.

> I want to read a 5.25" DS DD 96TPI 80 floppy. (160 tracks total)
> http://qdv.pw/coco/blog/2014/06/18/temporary-setup/

You will have to locate that speed jumper clip and reset it for 300 rpm.  
The data rate will take care of itself when hooked to a coco controller.
 
> Kandur
> 
> Wednesday, June 18, 2014, 6:03:12 AM, you wrote:
> > Kandur wrote:
> >> Thanks for the link Bill and many thanks to all who helped.
> >> I've got 'nos96809l2v030300coco3_80d.dsk' up and running on my 128k
> >> Coco-3. It came up with a very dark green background with black
> >> letters, hardly legible. Edited the startup file, changed the
> >> display to white background with black letters. It looks great, but
> >> after every new boot I have to run '/DD/startup' manually, despite
> >> it's attributes are set to e and pe. It seems the startup file is
> >> ignored at boot. Help please! I'm feverishly studying the 'OS-9
> >> Level II and the Tandy Color Computer 3' excellent tutorial by
> >> Rodger Alexander. Oh boy, I forgot almost everything, and worse
> >> then that, I'm mixing up the os-9 and linux commands. (:
> >> While I have your ears, can someone tell me, what fd descriptor do I
> >> need for my 5.25" drives, to read 160 track diskettes? Yes, my os-9
> >> backups are on DS, 80track on each side, 5.25" floppies. In
> >> general, is there a good place to find fd and hd descriptor
> >> samples, tutorials somewhere?
> >> 
> >> Kandur
> > 
> > You may have damaged the startup file. What
> > does it say after you edited it?
> > Startup does not require e or pe attributes to be used.
> > 
> > How did you change the display to white
> > background with black letters? By
> > implication you did something to startup (you
> > mentioned nothing else) but that
> > should be done by changing /term either with
> > xmode and cobbler or using dEd to
> > edit term in OS9Boot.
> > 
> > If you are booting from a Drivewire disk (has
> > dw in the name) then you will find
> > examples of descriptors in the directory tree
> > NitrOS-9/6809l2/modules/rbf. You
> > can also use the command
> > dmode /D0
> > to get an idea of the default parameters for a
> > floppy drive. Hard drives are not
> > standard in size so you will need to specify a
> > specific unit and the specs
> > before we can advise on descriptor settings.


Cheers, Gene Heskett
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