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-

Tor 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.

2-16Compaq Evo and Workstation Personal Computers

Featuring the Intel Pentium 4 Processor

Second Edition – January 2003

Page 42
Image 42
Compaq W4000 manual System Memory, Mass Storage, Serial and Parallel Interfaces, Universal Serial BUS Interface