Dmi Sub-Structure Tables - HP Vectra VL5 4 Technical Reference Manual

DMI SUB-STRUCTURE TABLES

Each type of table has a pre-defined format. Although the structure can evolve over time, new
fields are always added to the end of the table and the length value reflects this new size.
To parse several tables in order to find a specific table, simply use the table length. Using this
method will ensure that the parser can function even when the tables evolve over time.
To locate specific BIOS information, use the DMI sub-structure tables which are listed on the
following pages.
Type 1 : BIOS Information
Field
Type
Length
Vendor
BIOS Version
BIOS Starting
Address
BIOS Release Date
BIOS
Characteristics
BIOS ROM Size
Type 2: Component ID
Field
Type
Length
Manufacturer
Product
Version (oard
Revision)
Serial Number
Offset Length
0h 1 byte
1h 1 byte
2h 4 bytes
(DWORD)
6h 4 bytes
(DWORD)
Ah 2 bytes
(WORD)
Ch 4 bytes
(DWORD)
10h 4 bytes
(DWORD)
14h 1 byte
Offset Length
0h 1 byte
1h 1 byte
2h 2 bytes
(WORD)
4h 2 bytes
(WORD)
6h 2 bytes
(WORD)
8h 2 bytes
(WORD)
Value Description
1 BIOS information table
15h Table length (in bytes)
variable Far pointer to string containing BIOS vendor
name.
variable Far pointer to string containing BIOS version
number.
variable Segment location of BIOS starting address,
i.e. E800h.
variable Far pointer to string containing BIOS release
date.
variable Bit field value indicating which functions the
bit field BIOS supports.
variable Value indicating the size of the BIOS ROM:
0 64K,
1 128K,
2 256K,
3 512K, etc.
Value Description
2 Component ID table
0Ah Table length
variable Near pointer to string containing
manufacturer's name.
variable Near pointer to string containing product
name.
variable Near pointer to string containing date code.
variable Near pointer to string containing serial
number.