http://wiki.webos-internals.org/index.php?action=history&feed=atom&title=NVRAM 2026-04-06T04:27:36Z Revision history for this page on the wiki MediaWiki 1.35.1 http://wiki.webos-internals.org/index.php?title=NVRAM&diff=9972&oldid=prev 2010-05-19T11:46:14Z

<p></p> <table class="diff diff-contentalign-left diff-editfont-monospace" 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 11:46, 19 May 2010</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l20" >Line 20:</td> <td colspan="2" class="diff-lineno">Line 20:</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  tokens:  contains the [[Tokens]] area</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  tokens:  contains the [[Tokens]] area</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  logo-boot, logo-chg, logo-badchg, logo-nobatt, logo-badsys, logo-nosys, logo-panic, logo-disk: bitmap images</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  logo-boot, logo-chg, logo-badchg, logo-nobatt, logo-badsys, logo-nosys, logo-panic, logo-disk: bitmap images</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">The CRC polynomial is 0xedb88320.</ins></div></td></tr> </table>

IDG http://wiki.webos-internals.org/index.php?title=NVRAM&diff=9970&oldid=prev 2010-05-19T11:37:44Z

<p>Content of the NVRAM area</p> <p><b>New page</b></p><div>The NVRAM section of the flash has the following layout:<br /> <br /> Magic: 0x4d52564e 'NVRM'<br /> Version: 0x00000001<br /> Header size: 0x00001000 including magic, version, size and crc<br /> Header CRC: 0x???????? the CRC is computed on all the header treating the 4 CRC bytes as zeroes<br /> <br /> each entry in the NVRAM header has the following layout:<br /> <br /> Magic: 0x31434f54 'TOC1'<br /> Offset: 0x???????? offset of the content of the entry, starting from 0 at the NVRAM header<br /> Size: 0x???????? size in bytes of the entry<br /> Version: 0x00000001<br /> Name: up to 16 bytes, zero padded name of the entry.<br /> <br /> The following entries are present:<br /> <br /> envelope: contains all the NVRAM data.<br /> env: contains the environment variables (stored as name and values in zero terminated strings)<br /> tokens: contains the [[Tokens]] area<br /> logo-boot, logo-chg, logo-badchg, logo-nobatt, logo-badsys, logo-nosys, logo-panic, logo-disk: bitmap images</div>

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