Backend for CanoScan D1250U2?

Hi,
I bought a CanoScan D1250U2 two years ago which I would like
to use with
Linux now. Although from time to time there where people
working on a
backend its still unsupported. Last thing I heard of it was
that Norbert
Lataille did achieve some functionality 3 years ago. When I
tried to
contact him I did'nt get an answer.

Robert Jansen 3 years ago speculated that a SQ Scan09 ASIC
and a Philips
ISP1581 USB 2.0 Controller might be used in the D1250U2.
To make sure I opened my scanner, removed the
electromagnetic shield
from the circuit board and shot some photos. What I found
was that:

http:/
/jens-herrmann.gmxhome.de/MB-D1250U2.JPG

>From left to right:

* IC1: http://jens-h
errmann.gmxhome.de/IC1.JPG
is a IS41C16256-25K (DRAM)

* IC2: http://jens-h
errmann.gmxhome.de/IC2.JPG
128 Pin, has no logo or type on it, the 610800009721 is a
Part-Nr. .
I was not able to identify this IC.

* IC3: http://jens-h
errmann.gmxhome.de/IC3.JPG
is a L66219 (Step-Motor driver)

* IC4: http://jens-h
errmann.gmxhome.de/IC4.JPG
48 Pin, has no logo or type on it, the 610800010009 is a
Part-Nr. which
is listed here
http://www.hkinventory.com/public/OfferInventResult.asp?
Order=1&pnums=610800010009&crit1=&crit2=&cat
egory=&product=&keywords=&words=3&country=&a
mp;postdate=&brand=&crit3=&crit4=0&datecode=

and here
http://www.hobid.com
/bin/sep.php
when you search for it, but the type can't be found there
too.
I was not able to identify this IC either.

What can be said is that the ISP1581 is not used here,
because it is a
64 Pin type. Can anyone help with identification? What would
a repair
shop do when in need for one of these IC's? I called up a
reseller for
electronic components but they could'nt help.

I also would appreciate code examples for the D1250U2.
Please send an
Email to jemihegmx.de when working on the backend.

Thanks in Advance
Jens Herrmann
(from Germany)

-- 
sane-devel mailing list: sane-devellists.alioth.debian.org
http://lists.alioth.debian.org/mailman/listinfo/sane-d
evel
Unsubscribe: Send mail with subject "unsubscribe
your_password"
             to sane-devel-requestlists.alioth.debian.org