Chapter 7 BIOS ROM
Compaq Deskpro EXS and Workstation 300 Personal Computers
Featuring the Intel Pentium 4 Processor
First Edition - December 2000
7-12
7.5
CLIENT MANAGEMENT FUNCTIONS
Table 7-4 lists the client management BIOS functions supported by the systems covered in this
guide. These functions, designed to support intelligent manageability applications, are Compaq-
specific unless otherwise indicated.
Table 7-4. Client Management Functions (INT15)
Table 7-4.
Client Management Functions (INT15)
AX
Function
Mode
E800h
Get system ID
Real, 16-, & 32-bit Prot.
E813h
Get monitor data
Real, 16-, & 32-bit Prot.
E814h
Get system revision
Real, 16-, & 32-bit Prot.
E816h
Get temperature status
Real, 16-, & 32-bit Prot.
E817h
Get drive attribute
Real
E818h
Get drive off-line test
Real
E819h
Get chassis serial number
Real, 16-, & 32-bit Prot.
E820h [1]
Get system memory map
Real
E81Ah
Write chassis serial number
Real
E81Bh
Get hard drive threshold
Real
E81Eh
Get hard drive ID
Real
E827h
RIMM EEPROM Access
Real, 16-, & 32-bit Prot.
NOTE:
[1] Industry standard function.
All 32-bit protected-mode functions are accessed by using the industry-standard BIOS32 Service
Directory. Using the service directory involves three steps:
1.
Locating the service directory.
2.
Using the service directory to obtain the entry point for the client management functions.
3.
Calling the client management service to perform the desired function.
The BIOS32 Service Directory is a 16-byte block that begins on a 16-byte boundary between the
physical address range of 0E0000h-0FFFFFh. The format is as follows:
Offset
No. Bytes
Description
00h
4
Service identifier (four ASCII characters)
04h
4
Entry point for the BIOS32 Service Directory
08h
1
Revision level
09h
1
Length of data structure (no. of 16-byte units)
0Ah
1
Checksum (should add up to 00h)
0Bh
5
Reserved (all 0s)
