[Coco] Issues with NitrOS9 build

[Robert Gault]

Bob Devries wrote:
><snip>
> I found that the dmode of D0 has TYP set to 21 and dns set to 01. AFAIK, this is
> for 3.5" disk drives *only*. That is why the later versions can't be read on my
> 'older' version of NitrOS9, since that uses TYP=20 DNS=03.
>
> Question: when did NitrOS9 start using 3.5" drives, and is there some kind of
> option we could engineer to select 5.25" drives instead?
>
> Regards, Bob Devries
> Dalby, QLD, Australia
>

Probably when we started distributing 80-track disk images. All 40-track disks 
were assumed to be standard 5.25" 48tpi floppies. Currently the most available 
larger drives are 3.5" drives that can be used with 135tpi 80-track MF2DD disks.

Are 5.25" 96tpi drives still being sold?

Robert