On Tue, 2005-10-11 at 22:51 +0200, Philipp Schmid wrote:
> Brian J Densmore schrieb:
>
> Hello,
>
> So I think the only reasonable thing we could do is to devel one general SANE
> backend that
> is able to work with all TWAIN-drivers. But I'm not a man of TWAIN and I
> can't say if
> this is theoretical possible and how much time would be necessary to devel
> such a backend.
This is essentially the opposite of what is currently being done for
MacOS X. All applications on MacOS X use TWAIN for communicating with
the scanners. However, there is very little support from the scanner
vendors in providing TWAIN drivers for MacOS X.
So, what to do. The sane backends compiles and works (more or less) on
MacOS X, since it has a unix kernel and a gcc compiler, and the USB and
SCSI sane internals has been ported to the MacOS X IO kit APIs.
But since all MacOS X applications communicates via TWAIN, this alone is
not enough. However, there is a TWAIN SANE Interface which acts as a
TWAIN driver and accepts TWAIN requests from the applications and at the
same time as a SANE client forwarding the requests to the SANE backends.
So essentially you have the "one general" TWAIN driver that talks to
whatever scanner SANE supports.
Mattias
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From br...@amason.net Thu Oct 13 08:32:30 2005
From: br...@amason.net (Brian J Densmore)
Date: Thu Oct 13 09:21:14 2005
Subject: [sane-devel] Genesys - CanoScan 8400F (pt1)
Message-ID: <434e1b9e.9060...@amason.net>
I've tried posting this twice. I'm breaking it up into parts to see if
it posts.
My investigation of the CanoScan 8400F has so far found the following.
------------------------------------------------------
chips :
Scanner chip = GL843 [1]
I'm trying to get the datasheet on this. It's not
downloadable yet that I can see. I'll use the 842 datasheet for now.
I suspect the main differences between the 842 and 843 are increased
memory support and increased resolution support. The 8400F supports
3200x6400 scanning and any transparency up to 6x22cm.
Samsung K4S6411632H-UC75, 64Mb, 4Mb x 16 x 4 banks SDRAM = 8MB. [2]
Wolfson WM8199CDS image digitizer [3]
Allegro A3967SLB microstepping motor driver [4]
Allegro L6219DS Dual full-bridge PWM motor driver. [5]
A few other chips I didn't identify.
------------------------------------------------------
Brian JD
