sane-project-website/old-archive/1997-07/0102.html

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<!-- name="Gregory Trubetskoy" -->
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<title>sane-devel: More on Mustek 8000SP adventures...</title>
<h1>More on Mustek 8000SP adventures...</h1>
<b>Gregory Trubetskoy</b> (<a href="mailto:grisha@ispol.com"><i>grisha@ispol.com</i></a>)<br>
<i>Sun, 20 Jul 1997 01:54:28 -0400 (EDT)</i>
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Finally, past midnight, the Mustek scanner seems to be responding. Now the<br>
problem is that the image quality leaves quite a lot to be desired -<br>
whenever I use color mode, the image looks gray with lines running<br>
perpendicular to the direction of the scan ( horizontal lines, if you will)<br>
<p>
To get it to work so far, I did the following:<br>
<p>
( I am on Linux 2.0.30 using an ncr 810 card )<br>
<p>
Edited the ncr53c8xx.c with the guideline "to fix errors, eliminate the<br>
error checking!" : <br>
<p>
1. I was getting "extraneous data discarded" error, so I just commented<br>
out the error checking somewhere near the line 4509. The entire block<br>
beginning "if (cp-&gt;xerr_status != XE_OK)". I don't have a clear idea of<br>
what this does, I imagine it's necessary for something... <br>
<p>
2. I was getting another error "ncr dead?". For this, I changed line 5323<br>
from "if (np-&gt;latetime&gt;10)" to "if(np-&gt;latetime&gt;100". Once again I'm not<br>
sure what this did. I was guessing that 10 was in seconds, but it seems<br>
like after the change to 100 it completes scans that take way more than<br>
100 seconds. This 100 sends was picked completely out of the blue, but it<br>
seems to improve things...<br>
<p>
Now if only comebody could help me fix this image quality problem...<br>
<p>
Any comments would be highly apreciated. If this doesn't work ( SANE, that<br>
is ) I will officially declare Mustek Paragon 800SP ( == 8000SP ) a total<br>
piece of crap that only works on Windows 95 and only with their card.<br>
<p>
Thanks in advance for any help,<br>
<p>
------------------------------------------------------------<br>
Gregory (Grisha) Trubetskoy<br>
<a href="mailto:grisha@ispol.com">grisha@ispol.com</a><br>
<a href="http://www.ispol.com/home/grisha">http://www.ispol.com/home/grisha</a><br>
------------------------------------------------------------<br>
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<li> <b>Next message:</b> <a href="0103.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: More on Mustek 8000SP adventures..."</a>
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