[Coco] Nitros9 technical question....

[Robert Gault]

Phil,

This list ought to be as good as anything else but you can try:
https://sourceforge.net/projects/nitros9/
Look at the Support and Discussion panels.

Regards your specific question, you could study the current NitrOS-9 disk I/O code as it also needs 
to deal with simultaneous disk access when more than one program is running. I assume that the disk 
code should ask the system for permission to access a disk and/or the system should keep track of 
the number of current requests for disk access.
Either disk or system code would, in your case, then keep track of the A/O AVR values and prevent 
cross routing.

Robert

Phill Harvey-Smith wrote:
> Hi all,
>
> Is there still a Nitros mailing list that might be a more appropriate place for this?
>
> Anyway I have a mostly working boot & disk driver for the DragonMMC interface, which can boot and
> access any mounted disk images. What I want to do is to convert the ROM utilities that allow you to
> list the contents of the SD card, and mount / unmount images to command line utilities for Nitros.
>
> The DragonMMC works by having the FAT & SD reading part of the system handled by and AVR
> microcontroller, the 6809 side of things uses a set of I/O locations to exchange data with the AVR.
> This works for the disk driver code, and would be able to work for the utility code, however being a
> multi-tasking OS I need to ensure the utilities don't interfere with disk I/O that may be going on
> in the background.
>
> Does anyone have any suggestions as to the correct way to do this?
>
> Cheers.
>
> Phill.
>