[Coco] Issues with NitrOS9 build

[Bob Devries]

Gene,

I'm with you on that one.

I suggest an entry in rules.mak. That would mean just a single line change 
in rules.mak at build time to change the value to 5.25" or 3.5".

E.g. D80TRK=5
or D80TRK=3

and based on that, the 80 track descriptors should be correctly built, and 
also the format command will select the correct DD.FMT value for LSN0 for 
5.25" or 3.5" at the discretion of the user/builder.

More thoughts anyone?

Regards, Bob Devries
Dalby, QLD, Australia



----- Original Message ----- 
From: "Gene Heskett" <gheskett at wdtv.com>
To: <coco at maltedmedia.com>
Sent: Sunday, January 26, 2014 6:42 PM
Subject: Re: [Coco] Issues with NitrOS9 build


> On Sunday 26 January 2014 03:38:36 Bob Devries did opine:
>
>> One more comment on the 3.5" vs 5.25" situation:
>>
>> If I bring an image to my coco3, and copy it to a floppy, I can't then
>> backup that floppy with my now existing NitrOS9 system without hacking
>> the descriptors.
>>
>> Why was this change made? I believe that the original OS9 used DNS=03
>> and TYP=20 for 720K drives.
>>
> Correct, the 3.5" drive is DNS=1 TYP=21.
>
> There may be makefiles to adjust yet.  But, while doing that, how about we
> reename the *^$# descriptors to something that not only tells the tracks,
> but also the inch size of the disk so folks can more easily differentiate
> and pick the _right_ descriptor?
>
>> Regards, Bob Devries
>> Dalby, QLD, Australia
>>
>> ----- Original Message -----
>> From: "Tormod Volden" <lists.tormod at gmail.com>
>> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>> Sent: Sunday, January 26, 2014 5:42 PM
>> Subject: Re: [Coco] Issues with NitrOS9 build
>>
>> > On Sun, Jan 26, 2014 at 7:15 AM, Bob Devries wrote:
>> >>> Gene explained (in detail) here on the list why no Coco >disk should
>> >>> use DNS=3 except maybe the 5.25 80trk >720k disks(??).
>> >>
>> >> Which is *exactly* what I'm using, and always have. I only very
>> >> rarely use
>> >> 3.5" disks, and in fact don't have such a drive connected now.
>> >
>> > Bob, sorry for repeating myself, but did you try the JVC header I
>> > suggested to you? I haven't seen your answer to this.
>> >
>> > Tormod
>> >
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>
>
> Cheers, Gene
> -- 
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