You are right, but I haven't used /tried any of this kind of disks.fridgemagnet wrote: One more observation (although it doesn't affect me because I don't have any disks in this format), your logic for setting the sectors/track to 36 on detection of a disk with 1440 sectors isn't correct for an 80T/SS disk.
This 'special case' should come as total sectors = $5A0 (offset 0-1-2), sectors/track = $12 (offset 3), $2 for just one side (offset 16)
And to compensate, offset 7 must be $2 or we will not get to 1440 sectors anyway.
What my dweeb does in this case is create a VDK that is double sided instead of double track density, the same amount of sectors ... I will format a disk like that
DSKINIT1,1,80 and copy there some files.
Then I will transfer it to a VDK file to see how it has been created ... will let you know
cheers
pere