HP dc7800 System ID and ROM Type, Temperature Status, Drive Fault Prediction, System ID Numbers

SYSTEM BIOS

8.4.1 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 8-3

System ID Numbers

		Subsystem
System (Form Factor)	System ID	Device ID
USDT	0AA4h	281Ah
SFF	0AA8h	2818h
CMT:	0AACh	2819h

NOTE: For all systems, BIOS ROM Family = 786F1, PnP ID = CPQ0968, and Subsystem vendor ID = 103Ch.

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

8.4.2 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.

8.4.3 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

8-6 www.hp.com Technical Reference Guide