Compaq W4000 Manual De Usuario

Chapter 7  BIOS ROM 

 

 

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) 

 

 

 

   

 

      Client Management Functions (INT15)

 

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 

DIMM 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) 

7-12