ebdadump

Revision 1 as of 2011-08-17 11:06:02

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Firmware Test Suite - ebdadump utility

This utility locates the Extended BIOS Data Area (EBDA) and produces a hex dump of the data. The EBDA can contain firmware generated dynamic data structures such as MultiProcessor "floating" table headers and perhaps the ACPI Root System Description Pointer (RSDP).

An example output is as follows:

00012 ebdadump        Dump EBDA region.
00013 ebdadump        ---------------------------------------------------------------------------
00014 ebdadump        Test 1 of 1: Dump EBDA region.
00015 ebdadump        EBDA region: 9f800..a0000 (2048 bytes)
00016 ebdadump          9f800: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00017 ebdadump          9f810: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00018 ebdadump          9f820: 00 00 00 00 00 00 08 02 00 00 00 00 00 00 00 00  ................
..
..
00136 ebdadump          9ff80: 00 80 14 00 01 00 00 0a 00 00 00 00 00 00 00 02  ................
00137 ebdadump          9ff90: 00 00 00 00 00 80 14 04 01 00 40 0d 00 00 00 00  ..........@.....
00138 ebdadump          9ffa0: 00 00 c0 00 00 00 00 00 00 81 08 09 01 00 00 00  ................
00139 ebdadump          9ffb0: 00 82 08 00 00 00 00 00 00 82 08 00 00 01 00 00  ................
00140 ebdadump          9ffc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00141 ebdadump          9ffd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00142 ebdadump          9ffe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00143 ebdadump          9fff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................

Examples:

sudo fwts ebdadump - 

..runs the ebdadump on your machine and dumps the output to stdout.