[Coco] The difference between /SD0 and /D0

[Darren A]

On Wed, Nov 5, 2014 at 3:19 PM, Brett Gordon wrote:

> William:
>
> Are the d# descriptors and sd# descriptors really mutually exclusive?
> I'm now under the impression that NOS9's sd descriptors are really
> access different logical drives ( the two possible LBA ones) than the
> regular D# drives.  Darren:  are the LBA mode drives different than
> the FD drives on the SDC?  or are the FD drives mapped to the LBA
> drives somehow ?    IF they are different drives, I don't see any
> reason for not including them in your OS9BOOT.   My first message to
> Nick was botched... I thought the llsdc drivers for NOS where just
> fancy versions of rb1773
>
>
They are not mutually exclusive. The controller supports two simultaneously
mounted disk images (0 and 1). These images can be accessed either through
the native LBA mode or through emulation of the floppy controller hardware.

Darren