[Coco] OS-9/68K raw disk access syntax

[Bob Devries]

Off the top of my head, I used BASIC to read the disks something like this:

open #inpath, "/d0@", READ
open # outpath, "diskimage.dsk", WRITE

You need to either get the disk size from LSN0, or just hardcopy it in 
from the dmode output, then just read the sectors from 0 to maxsector-1

It worked for me... YMMV

Regards, Bob Devries
Dalby, QLD, Australia


On 2016-01-02 2:43 AM, Joel Ewy wrote:
> So, as another attempt to make a disk image file on the MM/1, I thought
> I would write the floppy image to a ramdisk (since I don't have a
> working hard drive on the MM/1 at the moment), then compress it, and see
> if I could squeeze it back on a FAT formatted floppy disk.  I thought I
> might be able to do this like so:
>
> copy /d1@ /r0/image.dsk
>
> Copy complains:  "can't get file descriptor.  Error #000:214". errmsg
> says "The file was found, but is inaccessible in the requested mode.
> Check the file's owner ID and access attributes."
>
> The OS-9 manual mentions that you need to be superuser to use raw disk
> access, and it sounds like maybe that is tripping me up here. But there
> are no user accounts set up on this boot floppy, as far as I can tell.
> Wouldn't superuser be the default, or is there some 'su' equivalent I'm
> forgetting about?  Or do I just have the syntax wrong?
>
> JCE
>