[Coco] Problem with Disto driver and PCdos in Nitros9

[Robert Gault]

mmarlett at isd.net wrote:

> Charlie,

> 

> I'm sure it is the driver. I use PCdos on my machine all the time. That is

> how you got the "dir" command last night. My system reads/writes in

> 180k/360k/720k/1.44mb modes Auto detects the disk type and switches the

> controller's transfer rates accordingly on the 720k/1.44mb.

> 

> As I recall, the PCdos utility also had to patch the driver for 512byte

> sector mode or something like that. I believe that the drivers for NitrOS-9

> does this but third party support might not. Robert???

> 

> Mark

 ><snip>

Far as I know, the Disto drivers will work with PCDOS. At least it works 
on my system.

I have a hunch Charlie is trying to read a high density disk instead of 
a medium density disk on the Coco. That is not going to work.

If it turns out Charlie was using an appropriate disk, I do have a 
driver that will with a Disto SCII. I just need to know which addresses 
are being used, $FF58 or $FF74.