[Coco] Issues with NitrOS9 build

[Tim Fadden]

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
>
>
> -- 
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
>
So, I assume my Three 5 1/4 inch 80 track disk drives will still work?

Tim