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

[Kip Koon]

Hi Kandur!
Well you little rascal!  :)  I have several Panasonic 1.2MB drives, actually
quite a few 1.2MB drives come to think of it, and I never realized that at
least some of them could be strapped for the low density mode!  The next
time I need 5.25" 720KB floppy drives I will definitely need to keep this
1.2MB floppy drive modification in mind.  Thanks to all for this.  I will
have to see what all the 1.2MB floppy drive models I have in my possession.
Thanks again for opening up my eyes to this possibility.  Take care my
friends.

Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/Kip_Koon
http://computerpcdoc.com/



-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Kandur
Sent: Wednesday, June 18, 2014 11:13 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] NitrOS-9 on a 128k Coco-3

Thanks Gene,
I got the service manual and the jumper settings for that drive.
I think, I found the speed select jumper.
http://qdv.pw/coco/blog/2014/06/19/panasonic-ju-475-4-5-14-fd/
First I couldn?t boot OS-9 from a 3.5" drive, because it's drive select was
soldered to /d1, took it apart and managed to change it to /d0.
http://qdv.pw/coco/blog/2014/06/19/changed-a-3-5-drives-drive-select-to-d0-f
rom-d1/ 

Heard, that you have a Coco running headless os-9 in the basement and access
it from a terminal (program?) from upstairs.
I used to have a similar setup with 4 VTUs connected to a Coco.
Would you mind to give me some pointers on how to set this up please?

Kandur

Wednesday, June 18, 2014, 4:36:31 PM, you wrote:
> 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
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page
> <http://geneslinuxbox.net:6309/gene>
> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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