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Chapter 2 System Overview
Compaq iPAQ Family of Internet Devices
First Edition – March 2000
2-8
2.4 SYSTEM ARCHITECTURE
The Compaq iPAQ Internet Device features an Intel Celeron or Pentium III processor and the
810e chipset. As indicated in the following table and shown in Figure 2-6, four architectural
configurations are available:
♦
Legacy-free with Celeron processor
♦
Legacy-free with Pentium III processor
♦
Legacy-light with Celeron processor
♦
Legacy-light with Pentium III processor
Legacy-free systems provide five Universal Serial Bus (USB) ports for connecting peripherals
(including the supplied USB mouse and USB keyboard). Legacy light systems provide two USB
ports along with the traditional PS/2 connectors for the supplied mouse and keyboard as well as
parallel and serial port connectors.
All systems use the 810e chipset. The 810e chipset includes the 82810e-DC100 GMCH designed
to provide control for SDRAM and also integrates an AGP 2X graphics controller. Pentium III-
based systems come with an additional 4-MB display cache to compliment the graphics
controller.
The 810e chipset also includes an 82801 I/O Controller Hub (ICH) that provides two IDE
interfaces, two USB interfaces, and a PCI bus controller. The 82802 Firmware Hub (FWH)
component is loaded with Compaq BIOS
Table 2-1 lists differences between system architectures:
Table 2-2.
Architectural Comparison
Table 2-2
.
Architectural Comparison
Celeron-Based Pentium III-Based Celeron-Based Pentium III-Based
Host bus (FSB)speed [1] 66 MHz 100 MHz 66 MHz 100 MHz
4-MB Display Cache? No Yes No Yes
PS/2 Mouse/Keyboard? No No Yes Yes
Serial port? No No Yes Yes
Parallel port? No No Yes Yes
# of USB ports 5 5 2 2
NOTES:
[1] As configured with 500-MHz processor.
Legacy Free Legacy Light