[Coco] Issues with NitrOS9 build

[Bob Devries]

Well, I got it to work, but I fail to understand why.

I changed offset $10 (DD.FMT) in LSN 0 from $07 to $03, and it boots 
correctly.

That change makes the disk a 48TPI instead of 96TPI.

Why does the TPI setting have *any* effect on the operation especially in an 
emulator. *something's* not right here.

Regards, Bob Devries
Dalby, QLD, Australia

----- Original Message ----- 
From: "Bill Pierce" <ooogalapasooo at aol.com>
To: <coco at maltedmedia.com>
Sent: Saturday, January 25, 2014 2:55 PM
Subject: Re: [Coco] Issues with NitrOS9 build


>
> Bob,
> Could it be that Vcc drive emulation is not recognizing the 80trk 
> properly? After all, it is a 35trk SSDD emulation when in rsdos/rgbdos. 
> Personally, I've never had any luck booting 80trk disks in Vcc, but the 
> repo has never had disks this good either :-)
>
>
> Bill Pierce
> "Today is a good day... I woke up" - Ritchie Havens
>
>
> My Music from the Tandy/Radio Shack Color Computer 2 & 3
> https://sites.google.com/site/dabarnstudio/
> Co-Webmaster of The TRS-80 Color Computer Archive
> http://www.colorcomputerarchive.com/
> Co-Contributor, Co-Editor for CocoPedia
> http://www.cocopedia.com/wiki/index.php/Main_Page
> E-Mail: ooogalapasooo at aol.com
>
>
>
>
> -----Original Message-----
> From: Bob Devries <devries.bob at gmail.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Fri, Jan 24, 2014 11:43 pm
> Subject: Re: [Coco] Issues with NitrOS9 build
>
>
> I did a CMP of the os9boot files on the 40 track disk
> (nos96309l2v030209coco3_40d_1.dsk) and the os9boot file on the 80 track 
> disk
> (nos96309l2v030209coco3_80d.dsk) and found that the only differences were
> two bytes in each Dx module (IT.TYP and IT.CYL) and of course, the CRC 
> bytes
> for each of those (4) modules.
>
> So why the failure of the 80 track image?
>
> Regards, Bob Devries
> Dalby, QLD, Australia
>
>
>
>
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