Compaq 850 manual Client Management Functions INT15, Function Mode

Chapter 7 BIOS ROM

7.5CLIENT 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)

7-12Compaq Deskpro EXS and Workstation 300 Personal Computers Featuring the Intel Pentium 4 Processor

First Edition - December 2000