[Coco] 720k sssd

[Darren A]

On 2/27/10, Stephen H. Fischer wrote:
> Hi,
>
> That's what  thought.
>
> The Flex disk reading program I remember takes entire control of the disk
> controller, the first DECB disk reading program did also.
>
> Later the OS-9 disk driver added support for reading DECB disks.
>
> I think that all CoCo disk controllers could do SD.
>

---

The CoCo disk controllers can do SD, but the standard OS-9 drivers
cannot.  Setting the controller for single-density mode disables the
Non-Maskable Interrupt (NMI) which the driver depends on. You would
need a specialized program or driver.

Darren