Intel® Server System S7000FC4UR TPS BIOS Role in Server Management
Revision 1.0
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18.5.1 Access Methods
Two access methods are defined for the SMBIOS structures.
The first method provides the SMBIOS structures through a PnP function interface. This
method is not supported by the BIOS.
The second method is the table convention. The table convention allows the SMBIOS
structures to be accessed under 32-bit protected-mode operating systems.
The total number of structures can be obtained from the SMBIOS entry-point structure. The
system information is presented to an application as a set of structures that are obtained by
traversing the SMBIOS structure table referenced by the SMBIOS entry-point structure.
18.5.1.1 Structure Table Entry Point
The SMBIOS entry point structure can be located by application software by searching for the
structure information in the following table within the physical memory address range of
000F0000h to 000FFFFFh. The SMBIOS tables are located above physical address 100000h.
Table 72. SMBIOS Table Entry Point Structure
Offset Name Length Value Description
00h Anchor String Four bytes "_SM_"
04h Entry Point Structure
Checksum
Byte Varies Checksum of whole structure.
05h Entry Point Length Byte 1Fh
06h SMBIOS Major
Revision
Byte 02h
07h SMBIOS Minor
Revision
Byte 05h
08h Maximum Structure
Size
Word Varies Size of largest supported structure.
0Ah Entry Point Revision Byte 00h
0Bh Formatted Area Five bytes
10h Intermediate Anchor
String
Five bytes "_DMI_"
15h Intermediate Checksum Byte Varies Checksum from 10h to end of structure.
16h Structure Table Length Word Varies Total length in bytes of structure pointed at by offset
18h.
18h Structure Table
Address
DWord Varies 32-bit physical starting address of the SMBIOS
structure table.
1Ch Number of SMBIOS
Structures
Word Varies Total number of SMBIOS structures present.
1Eh SMBIOS BCD Revision Byte 24h Bits 7:4 - Major revision
Bits 3:0 - Minor revision
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