Re: COOLSCAN II backend
Rogier Wolff (R.E.Wolff@BitWizard.nl)
Thu, 7 Aug 1997 14:00:46 +0200 (MET DST)
Didier Carlier wrote:
>
>
> Rogier Wolff writes:
>
> > Ohhh.. The coolscan wdb looks pretty normal.
> >
> > Didier do you have the SCSI spec? So does "section 14" mean anything
> > to you?
>
> Sure
>
> > Anyway, the Windows driver issues a "change units" command, and then
> > programs the window in pixels. The scan range is about an inch, so it
> > sets the units to 1/2800th of an inch or something close to that.
> >
> > You can also try to simply specify a window of 0, 0 to 0.5, 0.5
> > (600,600 in the default resolution of 1/1200th of an inch).
>
> Would you have a trace of a scan from the Windows driver that you
> could send by email ? That could probably help.
>
> What puzzles me is that all commands are accepted up to the first
> READ, at which point the front panel led flashes rapidly for a couple of
> seconds. This, according to the user's manual indicates an error
> condition, but the return code from the function is ok.
> All further READs also complete successfully, without flashes of
> the led on the front panel and at the end I get a black image (all
> zeroes).
>
> I guess there are a lot of places where a 'vendor specific' field of a
> command is required to be set to some value for the scanner, so
> debugging this without the specs (or possibly a trace ?) might be non
> realistic.
The "expensive" machine that we used to trace the stuff is actually
pretty old. So we had to copy over the bytes by hand.... So it is
possible that some errors were made.
I can't find the trace that Peter Knoppers might have sent me. It is
HIS coolscan, and he typed the trace.... He is getting a CC, and is
hereby requested to send the trace to Didier (carlierd@acm.org)....
Roger.
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