https://dsibrew.org/w/index.php?action=history&feed=atom&title=User%3ARemark%2FPit-fixcrc.c 2026-04-30T10:18:16Z Revision history for this page on the wiki MediaWiki 1.43.1 https://dsibrew.org/w/index.php?title=User:Remark/Pit-fixcrc.c&diff=1935&oldid=prev 2009-08-10T20:16:29Z

<p><a href="/wiki/Pit-fixcrc.c" class="mw-redirect" title="Pit-fixcrc.c">Pit-fixcrc.c</a> moved to <a href="/wiki/User:Remark/Pit-fixcrc.c" title="User:Remark/Pit-fixcrc.c">User:Remark/Pit-fixcrc.c</a></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 00:16, 11 August 2009</td> </tr><tr><td colspan="4" class="diff-notice" lang="en"><div class="mw-diff-empty">(No difference)</div> </td></tr> <!-- diff cache key dsibrew-dsi_:diff:1.41:old-1929:rev-1935 --> </table>

LoganA https://dsibrew.org/w/index.php?title=User:Remark/Pit-fixcrc.c&diff=1929&oldid=prev 2009-08-10T17:00:02Z

<p>New page: &lt;source lang=&quot;c&quot;&gt; // DSi pit-fixcrc // written by remark // thanks blastey #include &lt;stdio.h&gt; typedef unsigned char u8; typedef unsigned short u16; /* standard crc16 implementation : 0x...</p> <p><b>New page</b></p><div>&lt;source lang=&quot;c&quot;&gt;<br /> // DSi pit-fixcrc<br /> // written by remark<br /> // thanks blastey<br /> <br /> #include &lt;stdio.h&gt;<br /> <br /> typedef unsigned char u8;<br /> typedef unsigned short u16;<br /> <br /> /* standard crc16 implementation : 0x8001 */<br /> const u16 crc_table[256] = {<br /> 0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,<br /> 0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,<br /> 0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,<br /> 0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,<br /> 0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,<br /> 0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,<br /> 0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,<br /> 0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,<br /> 0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,<br /> 0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,<br /> 0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,<br /> 0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,<br /> 0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,<br /> 0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,<br /> 0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,<br /> 0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,<br /> 0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,<br /> 0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,<br /> 0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,<br /> 0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,<br /> 0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,<br /> 0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,<br /> 0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,<br /> 0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,<br /> 0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,<br /> 0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,<br /> 0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,<br /> 0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,<br /> 0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,<br /> 0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,<br /> 0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,<br /> 0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040<br /> };<br /> <br /> #define CRC(crcval,newchar) crcval = (crcval &gt;&gt; 8) ^ \<br /> crc_table[(crcval ^ newchar) &amp; 0x00ff]<br /> <br /> u16 crc16(const u8* message, int length)<br /> {<br /> int i;<br /> u16 crc = 0;<br /> for(i = 0; i &lt; length; i++)<br /> CRC(crc, message[i]);<br /> return crc;<br /> }<br /> /* end crc16 implementation */<br /> <br /> #define PIT_SIZE 0xBB90<br /> <br /> int main(int argc, char* argv[])<br /> {<br /> if(argc != 2)<br /> {<br /> return 0;<br /> }<br /> <br /> FILE* fp = fopen(argv[1], &quot;rb&quot;);<br /> if(fp == NULL)<br /> {<br /> perror(&quot;fopen&quot;); return 1;<br /> }<br /> <br /> char buf[PIT_SIZE];<br /> if(fread(buf, PIT_SIZE, 1, fp) != 1)<br /> {<br /> perror(&quot;fread&quot;); return 1;<br /> }<br /> <br /> // set crc-field to zero and calc!<br /> buf[0x14] = 0;<br /> buf[0x15] = 0;<br /> u16 new_crc = crc16(buf, PIT_SIZE);<br /> <br /> // endian conversion<br /> buf[0x14] = new_crc&amp;0xFF;<br /> buf[0x15] = (new_crc&gt;&gt;8);<br /> <br /> fp = freopen(argv[1], &quot;wb+&quot;, fp);<br /> if(fwrite(buf, PIT_SIZE, 1, fp) != 1)<br /> {<br /> perror(&quot;fwrite&quot;); return 1;<br /> }<br /> <br /> fclose(fp);<br /> return 0;<br /> }<br /> &lt;/source&gt;</div>

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