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Chapter 2 System Overview
2.4.4 SYSTEM MEMORY
Two memory types are used in these systems:
♦ PC133-based with three DIMM sockets supporting up to 3 gigabytes of SDRAM memory
♦ 266-MHz DDR-based with two DIMM sockets supporting up to 2 gigabytes of DDR
memory.
NOTE: The maximum memory amounts stated above are with 1-GB memory modules
using 512 Mb technology DIMMs.
Industry-standard SDRAM DIMMs and DDR266 DIMMs are not interchangable in these
systems.
2.4.5 MASS STORAGE
All models include a 3.5 inch 1.44-MB diskette drive installed as drive A. Most models also
include a CD-ROM and either a 10-, 15-, or 20-GB hard drive. Standard hard drives feature Drive
Protection System (DPS) support. All systems provide two (one primary, one secondary) PCI
bus-mastering Enhanced IDE (EIDE) controllers integrated into the chipset. Each controller
provides UATA/100 support for two drives for a total of four IDE devices, although the form
factor will determine the actual number of drive spaces available.
2.4.6 SERIAL AND PARALLEL INTERFACES
All models include two serial ports and a parallel port accessible at the rear of the chassis. Each
serial port is RS-232-C/16550-compatible and supports standard baud rates up to 115,200 as well
as two high-speed baud rates of 230K and 460K, and utilize DB-9 connectors. The parallel
interface is Enhanced Parallel Port (EPP1.9) and Enhanced Capability Port (ECP) compatible, and
supports bi-directional data transfers through a DB-25 connector.
2.4.7 UNIVERSAL SERIAL BUS INTERFACE
All models feature a minimum of two Universal Serial Bus (USB) v1.1 ports that provide a
12Mb/s interface for peripherals. The Compaq Evo desktop and configurable minitower models
may be upgraded to include two additional USB ports on the front panel. All small form factor
and Workstation models include front panel USB ports in the standard configuration. The USB
provides hot plugging/unplugging (Plug ’n Play) functionality.
2.4.8 NETWORK INTERFACE CONTROLLER
All models feature a Network Interface Controller (NIC) integrated on the system board.
Equivalent to the Intel 82562 10/100 NIC, the controller provides automatic selection of 10BASE-
T or 100BASE-TX operation with a local area network and includes power-down, wake-up, and
Alert-On-LAN features. An RJ-45 connector is provided on the rear panel.
Compaq Evo and Workstation Personal Computers
Featuring the Intel Pentium 4 Processor
Second Edition – January 2003
2-16