[Coco] a quick question

[Phill Harvey-Smith]

Robert Gault wrote:
> Neil Morrison wrote:
> 
>> Tracks 0 - 34 Directory on 17
>> Sectors 1 - 18

And if it helps, and this may be of general interest, DragonDos is 
pretty similar except that it can also deal with 80 track and double 
sided disks.... so

Tracks 0..39 or 79, directory on 20, copy on 16
Sides 0 or 1
Sectors 1..18 (though the Sread and Swrite commands ignore the sides
and use sector numbers 19..36 for side 1).

> And if that is not enough info, the sectors have a skip factor of 4 
> under Disk Basic. That is the sectors exist on a disk in the following 
> order: 1, 12, 5, 16, 9, 2, 13, 6, 17, 10, 3, 14, 7, 18, 11, 4, 15, 8.

Dragondos also uses an interleave of 4 so, it must have been pretty much 
optimal for a 0.9MHz 6809.

Cheers.

Phill.

-- 
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !

"You can twist perceptions, but reality won't budge" -- Rush.