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Chapter 8 BIOS ROM
Compaq iPAQ Family of Internet Devices
First Edition - March 2000
8-4
8.2.1 SYSTEM ID
The INT 15, AX=E800h BIOS function can be used to identify the type of system. This function
will return the system ID in the BX register.
System ROM Type PnP ID System ID
Compaq iPAQ 686J1 CPQB1A0 0630h
8.2.2 SYSTEM INFORMATION TABLE
The System Information Table (SIT) is a comprehensive list of fixed configuration information
arranged into records. The INT 15 AX=E807h BIOS function accesses the SIT by returning a
pointer in ES:BX to indicate the location of the SIT. This system includes the following SIT
records:
Record # Function
01h Power conservation
02h System standby
03h Display screensave
04h Hard drive timeout counter
05h Security features
06h Processor, memory, cache attributes
07h General peripheral & input device information
08h Memory module information
09h Timeout default value
0Ah CMOS information
0Eh Extended disks information
0Fh System information
10h Product name header
12h Processor micro-code patch data
The SIT records are used by Compaq applications such as Diagnostics, Inspect, and Insight
Manager. Other applications may use SMBIOS firmware to obtain system data.