[Coco] How to create an 80 track 2 sided disk with SDC

[Nick Marentes]

On 17/12/2015 9:52 AM, Darren A wrote:

> SDC-DOS will not access the 2nd side of a double-sided DSK image. The trick
> used in DECB for floppy disks (patching the drive selects table) will not
> work.
>
> If you just want to create an 80 track, double-sided image for use with
> OS-9, you can try the following commands:
>
> DRIVE 1, "NEWDISK.DSK", NEW
> DRIVE 1, 4
> DSKO$ 1,19,18,"",""
> DRIVE 1,UNLOAD
>
> All this does is enlarge the size of the DSK file to hold 2880 sectors (2
> sides * 80 tracks * 18 sectors-per-track).
>
> - Darren
>

Ok. How then can I create an 80 track single sided DSK?

I have no interest in OS-9. What does the DRIVE 1,4 actually do?

Is there a document I should be reading that explains all this?

Nick