[Coco] Drivewire, NitrOS9, and floppy drives

[Willard Goosey]

On Tue, Apr 07, 2009 at 10:29:54PM -0400, Robert Gault wrote:

[...]
> LevelII or maybe LevelI version 2, contained a driver that correctly 
> handled double sided disks. Now users had a choice of how disks should 
> be formatted, but old disks formatted as two singles might still need to 
> be used.

Eeeck!  I didn't know anyone ever did that with OS-9 disks.  I guess I
assumed that anyone who wanted DD drives "back in the day" sprang for
SDISK.

> You can increase the number of "drives" that rb1773 handles from 4 to 6, 
> maybe 7. The drive mask table would be $01,$02,$04,$40,$41,$42,$44. That 
>  could give you /d0 /d1 and /d2 as true doubles, /d3 would be a single 
> sided drive, /d4 /d5 and /d6 would be the back sides of /d0 /d1 and /d2.

OK, if you need to access some truly ancient disks.  

Otherwise, it's an interesting idea.

Willard
-- 
Willard Goosey  goosey at sdc.org
Socorro, New Mexico, USA
I search my heart and find Cimmeria, land of Darkness and the Night.
  -- R.E. Howard