[Coco] enable no-halt disto driver

[Robert Gault]

Mike Pepe wrote:
> hey guys,
> 
> playing with a disto SC2 here. how do I get the no-halt mode to work in 
> nitros9? I'm guessing I need to build a new boot file with the proper 
> driver installed?
> 
> I forget how to do it...
> 
> -Mike
> 

Decide whether you need 6809 or 6309 for the CPU and select the correct 
80 track disk as that contains the needed modules. For example, change 
to the directory NitrOS-9/6309L2/BootLists and List the standard.bl 
file. You will see many entries for the WD1773 disk controller.

Comment out the Tandy rb1773.dr and select the Disto SCII driver 
required for your system based on the needed I/O address, $FF74 or 
$FF58. It hardly matters with an emulator but is important with 
hardware. The I/O port is controlled by a jumper in the controller and 
should be set so that there are no conflicts with for example a hard 
disk interface.
Select the desired descriptors for the drives you have.

Now you can change directories to NitrOS-9/6309L2/Scripts and use mb to 
create a bootable disk with the no-halt drivers.