BIOS ROM

8.5.1 System ID and ROM Type

Diagnostic applications can use the INT 15, AX=E800h BIOS function to identify the type of system. This function will return the system ID in the BX register. systems have the following IDs and ROM family types:

Table 8-5

System ID

System (Form Factor)

System ID

 

 

USDT

0980h

 

 

SFF/ ST:

 

DDR

097Ch

DDR2

09D0h

 

 

 

uT:

 

DDR

0984h

DDR2

09CCh

 

 

 

CMT:

 

DDR

0968h

DDR2

09C8h

 

NOTE: All systems use BIOS ROM Family 786C1 and PnP ID CPQ0968.

The ROM family and version numbers can be verified with the Setup utility or the Compaq Insight Manager or Diagnostics applications.

8.5.2 Temperature Status

The BIOS includes a function (INT15, AX=E816h) to retrieve the status of a system's interior temperature. This function allows an application to check whether the temperature situation is at a Normal, Caution, or Critical condition.

8.5.3 Drive Fault Prediction

The BIOS directly supports Drive Fault Prediction for IDE (ATA)-type hard drives. This feature is provided through two Client Management BIOS calls. Function INT 15, AX=E817h is used to retrieve a 512-byte block of drive attribute data while the INT 15, AX=E81Bh is used to retrieve the drive's warranty threshold data. If data is returned indicating possible failure then the following message is displayed:

1720-SMART Hard Drive detects imminent failure

Technical Reference Guide

361834-002

8-17