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8-6 www.hp.com Technical Reference Guide

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:

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

Table 8-3

System ID Numbers

System (Form Factor) System ID

Subsystem

Device ID

USDT 0AA4h 281Ah

SFF 0AA8h 2818h

CMT: 0AACh 2819h

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HP Compaq dc7800 Series Specifications

General

Processor	Intel Core 2 Duo, Intel Pentium Dual-Core, Intel Celeron
Chipset	Intel Q35 Express
Memory	Up to 8 GB DDR2 SDRAM
Audio	Integrated High Definition Audio
Form Factor	Ultra-slim desktop, Small form factor, Convertible minitower
Storage	80GB to 500GB SATA HDD
Graphics	Integrated Intel Graphics Media Accelerator 3100
Optical Drive	DVD-ROM, DVD+/-RW
Network	Integrated Gigabit Network Connection
Ports	USB 2.0, VGA, serial, parallel, audio in/out
Operating System	Windows Vista, Windows XP, FreeDOS
Expansion Slots	1 low-profile PCI, 1 low-profile PCI Express x16
Power Supply	240W