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<title>sane-devel: Does anybody recognize this inquiry information ?</title>
<h1>Does anybody recognize this inquiry information ?</h1>
<b>Bernd Schroeder</b> (<a href="mailto:bernd@aquila.muc.de"><i>bernd@aquila.muc.de</i></a>)<br>
<i>Sat, 17 Oct 1998 17:16:51 +0200</i>
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Hi,<br>
<p>
some weeks ago someone asked, whether his "Black Widow" scanner is<br>
supported by sane, and I suggested to try it with one of the microtek<br>
backends, because it was mentioned, that this device had an "empty"<br>
vendor string in its inquiry information.<br>
<p>
In the meanwhile I have received the complete inquiry information, which is<br>
as follows:<br>
<p>
[inquiryresult]<br>
0: 060002015b000000<br>
8: 2020202020202020<br>
16: 466c617462656420<br>
24: 5363616e6e657220<br>
32: 312e393000000000<br>
40: 0000000000000000<br>
48: 0000000000000000<br>
56: 0000000000000000<br>
64: 0000000000000000<br>
72: 0000000000000000<br>
80: 0000000000000000<br>
96: 0000000000000000<br>
<p>
The vendor string consists of 8 spaces, and the model string is simply<br>
"Flatbed Scanner ".<br>
<p>
The inquiry information looks similar to what the microtek2 backend<br>
expects.<br>
<p>
- Microtek uses 8 spaces as a vendor id.<br>
<p>
- The format of the revision level is the same as for Microtek devices<br>
(1 digit major revision, then a dot, then 2 digits minor revision level).<br>
Of course, other manufacturers may use this format as well.<br>
<p>
But there are also some things, that are unusual for Microtek scanners.<br>
<p>
- The response type code is 0x01 instead of 0x02, which, according to<br>
my understanding of the SCSI-2 spec, means, that it is some kind<br>
of pre-SCSI-2 standard (CCS). I don't know, if a backend should take<br>
care of this.<br>
<p>
- Normally there is a model code != 0x00 at inquiryresult[36].<br>
<p>
If the backend is modified to accept a model code of 0x00 the system locks<br>
up, when the next SCSI command is executed, which is a vendor specific<br>
read command:<br>
<p>
28008200000000001f0000<br>
<p>
Since the device does not return a 'check condition' I assume that it<br>
understands a read with a data type code of 0x82.<br>
<p>
Now I am unsure, which company is the manufacturer of this device.<br>
Especially the vendor id lets me believe, that it is a Microtek, because<br>
manufacturers should register this vendor string with a committee to<br>
avoid conflicts.<br>
<p>
Bernd<br>
<p>
<pre>
--
Bernd Schroeder
Email: <a href="mailto:bernd@aquila.muc.de">mailto:bernd@aquila.muc.de</a>
PGP public key available: <a href="mailto:pgp@aquila.muc.de">mailto:pgp@aquila.muc.de</a> | Subject: send key
<p>
<pre>
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<li> <b>Next message:</b> <a href="0188.html">Tobias Ernst: "XPhotocopy question"</a>
<li> <b>Previous message:</b> <a href="0186.html">Peter Daum: "Re: xscanimage works, scanimage not (Umax Astra 1220S)"</a>
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<li> <b>Next in thread:</b> <a href="0189.html">Wolfgang Goeller: "Re: Does anybody recognize this inquiry information ?"</a>
<li> <b>Reply:</b> <a href="0189.html">Wolfgang Goeller: "Re: Does anybody recognize this inquiry information ?"</a>
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