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 = 786G7.
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.
Table 8-3
System ID Numbers
System (Form Factor) System ID
USDT 3648h
SFF 3646h
CMT 3647h
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