[Coco] HDB-DOS Question

[Gene Heskett]

On Thursday 14 May 2020 05:27:54 Jeff Teunissen wrote:

> On Thu, May 14, 2020 at 3:42 AM Gene Heskett <gheskett at shentel.net> 
wrote:
> > On Thursday 14 May 2020 00:22:30 tonym wrote:
> > > Anyone know how to pull the "offset" you entered when creating a
> > > drive?
> > >
> > > Years ago, I setup a Glenside IDE with a 512MB CF card, and
> > > generated the HDBDOS ROM file, which I flashed to my SDC. Can't
> > > find the paperwork where I wrote the information down, but I think
> > > I still have the .DSK image I used when generating.
> > >
> > > Is there a peek() I can do while under the HDB ROM that will give
> > > me the offset I used?
> >
> > That offset, generally, is the first 3 bytes of the drive, (DD.SIZ
> > in the defs) plus 1. Everything beyond that point that is still
> > reachable with that 24 bit address limit, is free for rsdos vdisk
> > use.
>
> He wasn't trying to find out the size of the disk, he was trying to
> find how big a disk to make to match the offset burned into his
> HDB-DOS ROM. That information can only be gotten by reading the ROM
> itself.
Ahh, generally the disk and the rom match. if they were configured at the 
same time.  But I haven't done the peeks in 25 years, so I picked the 
way I am familiar with.

Cheers, Gene Heskett
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