[Coco] Technical OS9 Q.

[Robert Gault]

Maybe not but just look at the OS-9 manual p5_2 where a map of disk 
sector LSN0 is given. If you don't have the manual, look at the NitrOS-9 
source code from nitros9.org in defs/rbfdefs and you will find
DD.OPT rmb 32          as the last entry for LSN0. It should also be in 
the rbfdefs as part of the standard OS-9 defs directory.

Even though you specified that this was a PC problem and not an OS-9 
one, any emulation must follow the OS-9 rules so LSN0 of a disk image 
must contain the above information.

Bob Devries wrote:
> Robert Gault said:
> 
>> LSN0 should contain at DD.OPT ($3F) path descriptor options. That 
>> would put a copy of PD.SAS at LSN0 $4D.
> 
> 
> OK, I didn't know that. The header file direct.h, which has the ddsect 
> structure, does not have anything beyond dd_name. It mentions nothing 
> about the pd.opts section. Is there a better direct.h file than what's 
> included with MW C?
> Thanks for the heads up.
> -- 
> Regards, Bob Devries, Dalby, Queensland, Australia
> 
> Isaiah 50:4 The sovereign Lord has given me
> the capacity to be his spokesman,
> so that I know how to help the weary.
> 
> website: http://www.home.gil.com.au/~bdevasl
> my blog: http://bdevries.invigorated.org/
> 
>