## page was renamed from Kernel/Reference/fwts/bios32
## page was renamed from Kernel/Reference/fwts/apciinstance
== Firmware Test Suite - apicinstance test ==

This test checks that the [[http://www-pc.uni-regensburg.de/hardware/TECHDOK/BIOS_32BIT_SERVICE.PDF|Standard BIOS 32-bit Service Directory]] header is sanely configured. 

Example output from this test:

{{{
Check BIOS32 Service Directory.
--------------------------------------------------------------------------------
Test 1 of 1: Check BIOS32 Service Directory.
This test tries to find and sanity check the BIOS32 Service Directory as defined
in the Standard BIOS 32-bit Service Directory Proposal, Revision 0.4 May 24,
1993, Phoenix Technologies Ltd and also the PCI BIOS specification.
Found BIOS32 Service Directory at 0x000f2550
  Signature  : _32_
  Entry Point: 0x000fc200
  Revsion    : 0x00
  Length     : 0x01
  Checksum   : 0x0b

PASSED: Test 1, Service Directory Entry Point 0x000fc200 is not in high memory.
PASSED: Test 1, Service Directory Length is 1 (1 x 16 bytes) as expected.
PASSED: Test 1, Service Directory Revision is 0x00 and is supported by the
kernel.
PASSED: Test 1, Service Directory checksum passed.
}}}

=== Examples: ===

{{{sudo fwts bios32 -}}}

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

== Explanation of test results ==

Certain test results may require a little more explanation. This section will try and give some context to specific test failures.

||Error ID||Explanation||
||BIOS32SrvDirEntryPointHighMem||Service Directory Entry Point is in high memory and hence cannot be used by the kernel.||
||BIOS32SrvDirEntryLength||Service Directory structure is the wrong size, it should be 16 bytes long.||
||BIOS32SrvDirRevision||Service Directory revision is not recognised and may not be supported by the kernel.||
||BIOS32SrvDirCheckSum||Service Directory checksum error.||
||BIOS32MultipleSrvDirInstances||Multiple Service Directories were found, there should be just one.||