[Coco] Issues with NitrOS9 build

[Gene Heskett]

On Sunday 26 January 2014 18:56:27 Tim Fadden did opine:

> On 1/26/2014 12:42 PM, Robert Gault wrote:
> > Bob Devries wrote:
> >> 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
> > 
> > If you look in the technical section of OS-9 Level2 you will find that
> > IT.TYP bit 0 is defined 0=5" floppy so you would expect 1=3.5" floppy.
> > ITDNS is defined as bit0 0=FM 1=MFM, bit1 0=5" 48tpi 1=5" 96tpi. It
> > does not seems to be explicitly stated but DD.FMT bit0 0=single sided
> > 1=double sided bit1 is density.
> > 
> > NitrOS-9 has followed this convention and there is no need to change
> > these definitions. What would make sense is to decide what format we
> > want an 80-track disk to have. It seems reasonable to me that all
> > 40-track disk images be 5.25" 48tpi disks and all 80-track disk images
> > be 3.5" 135tpi. By convention in the current rbf.d file, 48tpi and
> > 135tpi disks are both assigned DNS.STD while 96 tpi is assigned
> > DNS.DTD.
> > 
> > ==================
> > It should be clear to all, that the initial report of this problem did
> > not indicate anything about the actual hardware in use for drives.
> > Please please everyone, in future when reporting problems present
> > enough data for the problem to be solved. In this case, reporting a
> > problem with DD.FMT and not indicating the version of NitrOS-9 in use,
> > whether actual hardware or an emulator was used for testing, and what
> > drive hardware was used made it impossible to formulate any theories.
> > 
> > Robert
> 
> So, I assume my Three 5 1/4 inch 80 track disk drives will still work?
> 
> Tim

Until their heads or drive belts if any, wear out. 
 
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco


Cheers, Gene
-- 
"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>

NOTICE: Will pay 100 USD for an HP-4815A defective but
complete probe assembly.

"At least they're ___________EXPERIENCED incompetents"
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
         law-abiding citizens.