[Coco] Toolshed help

[Robert Gault]

Mike Rowen wrote:
> Here is the output of dmode /d0:
>
> nam=D0 mgr=RBF ddr=rb1773
> hpn=07 hpa=FF40 drv=00 stp=03 type=20 dns=01 cyl=0028 sid=02
> vfy=01 sct=0012 t0s=0012 ilv=03 sas=08 wpm= ofs= rwc=
>
>
>

Mike,
That tells you what the default settings for /d0 are but does not tell you how 
the disk in question was formatted. If you format a new disk while running OS-9 
without any parameters, you will get a double sided 40-track disk with these 
dmode values. It may or may not match the disk in question.

You need to read the disk you want to backup to determine its format. The 
easiest way to do that is   free /d0  . You can deduce the structure from the 
number of sectors reported. For more exact info, you can do
ded /d0@
and read the data from sector 0 which will give the precise format.
Bytes      Meaning in Hex
0-2        number of sectors
3          sectors per track
$10        Format bit#0 0=single sided 1=double sided
                   bit#1 0=single density 1=double density
                   bit#2 0=48 tracks/inch 1=96 t/i