HP Vectra XM5 4 Technical Reference Manual page 48

4 Retrieve the position and length of the DMI structures.
5 Calculate the check-sum value for the DMI structures.
6 Verify this value against the check-sum given for the DMI structures.
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.
Field
Type
Length
Vendor
BIOS Version
BIOS Starting
Address
BIOS Release
Date
BIOS
Characteristics
BIOS ROM
Size
Field
Type
Length
Manufacturer
Product
Version
(Board Revision)
Serial Number
Type 1 : BIOS Information
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
Type 2: Component ID
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
bit field the 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.