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System I/O, PCI Auto-Configuration, ISA Plug and Play Capability - cmos setup

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1.3.8 System I/O The onboard I/O controller integrates the functions for the serial and parallel ports, diskette drives, the keyboard and mouse. This component provides support for the following: s Multimode bidirectional parallel port t Standard mode: Centronics-compatible operation t High-speed mode with support for an enhanced capabilities port (ECP) and enhanced parallel port (EPP) s One RS-232C compatible 9-pin serial port s Integrated real-time clock s 242-byte, battery-backed CMOS RAM s Integrated 8042-compatible keyboard controller s Industry-standard diskette drive controller that supports 360-kilobyte and 1.2-megabyte 5.25-inch drives 1.3.9 System BIOS The system BIOS provides ISA and PCI compatibility. Contained in a flash memory device on the system board, the BIOS provides both the Power-On Self-Test (POST) and PCI and EIDE autoconfiguration utilities. The system BIOS is always "shadowed." Shadowing allows any BIOS routines to be executed from fast 64-bit onboard DRAM instead of from the slower 8-bit flash device. PCI Auto-Configuration The PCI auto-configuration utility works in conjunction with the Setup program to support using PCI expansion boards in the system. When you turn on the computer power after installing a PCI board, the BIOS automatically configures interrupts, I/O space, and PCI devices. If problems arise or you wish to reconfigure the device, refer to Chapter 2, "Compaq Utilities," which explains how to use the Setup program. The PCI auto-configuration program complies with version 2.1 of the PCI BIOS specification. IDE/EIDE Auto-Configuration If you install an IDE/EIDE drive into the computer, the IDE/EIDE auto-configuration utility automatically detects and configures the drive for operation in the computer. This utility eliminates the need to run the Setup program after you install an IDE/EIDE drive. ISA Plug and Play Capability ISA Plug and Play capability provides auto-configuration of Plug and Play ISA boards and resource management for legacy (non-Plug and Play) ISA boards when used with Computer Setup or a Plug and Play-compatible operating system like Microsoft's Windows 95. 1-8 Product Description

Section	Page
NOTICE	3
CONTENTS	5
PRODUCT DESCRIPTION	13
1.1 Compaq Deskpro 2000 Series of Personal Computer Models	14
1.2 Features	15
1.3 System Design	17
1.4 Desktop Computer Features	26
1.5 Minitower Computer Features	29
1.6 Enhanced Keyboard	34
1.7 Options	36
COMPAQ UTILITIES	39
2.1 Getting Ready	39
2.2 Computer Setup	41
2.3 Computer Checkup (TEST)	48
2.4 View System Information (INSPECT)	49
2.5 Create a Diagnostics Diskette	50
2.6 Managing the Diagnostics Partition	50
2.7 Exiting the Compaq Utilities Menu	51
2.8 Compaq Enhanced Insight Personal Edition (Diagnostics for Windows)	51
2.9 Power-On Self-Test (POST)	51
2.10 ROMPaq	52
2.11 Compaq Intelligent Manageability	53
ILLUSTRATED PARTS CATALOG	66
3.1 System Unit	67
3.2 Mass Storage Devices	71
3.3 Cables	73
3.4 Standard and Optional Boards	75
3.5 Keyboards	79
3.6 Monitors	81
3.7 Miscellaneous Hardware Kit	84
3.8 Miscellaneous Plastics Kit	85
3.9 Miscellaneous Parts	87
3.10 Shipping Boxes	89
REMOVAL AND REPLACEMENT PRELIMINARIES	94
4.1 Electrostatic Discharge Information	94
4.2 Routine Care	97
4.3 Service Considerations	99
REMOVAL AND REPLACEMENT PROCEDURES - DESKTOP	101
5.1 Serial Number	101
5.2 Disassembly Sequence Chart	102
5.3 Preparation for Disassembly	103
5.4 Feet	104
5.5 Cable Lock	105
5.6 System Unit Cover	106
5.7 Speaker	107
5.8 Expansion Board	109
5.9 System Board Components	112
5.10 Riser Board	118
5.11 Riser Brace	119
5.12 Expansion Board Guide	120
5.13 Replacement Battery	121
5.14 Front Bezel Assembly	123
5.15 Power Supply Assembly	127
5.16 Mass Storage Devices	130
5.17 Drive Cage	137
5.18 LED Cable	138
5.19 System Board	140
REMOVAL AND REPLACEMENT PROCEDURES - MINITOWER	143
6.1 Serial Number	143
6.2 Disassembly Sequence Chart	144
6.3 Preparation for Disassembly	145
6.4 Feet	145
6.5 Cable Lock	146
6.6 Exposing the Chassis	147
6.7 Riser Brace	149
6.8 Expansion Board	150
6.9 Expansion Board Guide	152
6.10 Riser Board	153
6.11 Speaker	154
6.12 System Board Components	155
6.13 System Board	161
6.14 Replacement Battery	164
6.15 ISA Option Board Retainer	166
6.16 Front Bezel Assembly	167
6.17 Power Supply Assembly	171
6.18 LED Cable	174
6.19 Mass Storage Devices	176
JUMPER AND SWITCH INFORMATION	184
7.1 System Board Switches	185
7.2 System Board Jumpers	189
7.3 Hard Drives	193
7.4 CD-ROM Drive Jumper Settings	201
7.5 Optional PD-CD Drives	201
7.6 Diskette Drive	202
SPECIFICATIONS	203
8.1 System	203
8.2 Drives	209
8.3 Audio System	216
8.4 Keyboard	216
8.5 Mouse	217
8.6 Supported Graphics Resolutions	217
CONNECTOR PIN ASSIGNMENTS	219
POWER CORD SET REQUIREMENTS	225
HARD DRIVES	227
DIAGNOSTIC ERROR CODES	232
POST ERROR MESSAGES	243
TROUBLESHOOTING WITHOUT DIAGNOSTICS	246
INTEL 440LX CHIPSET MEMORY LIMITATIONS	258

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1-8

Product Description

1.3.8

System I/O

The onboard I/O controller integrates the functions for the serial and parallel ports, diskette drives,

the keyboard and mouse. This component provides support for the following:

■

Multimode bidirectional parallel port

Standard mode: Centronics-compatible operation

High-speed mode with support for an enhanced capabilities port (ECP) and enhanced parallel

port (EPP)

■

One RS-232C compatible 9-pin serial port

■

Integrated real-time clock

■

242-byte, battery-backed CMOS RAM

■

Integrated 8042-compatible keyboard controller

■

Industry-standard diskette drive controller that supports 360-kilobyte and 1.2-megabyte

5.25-inch drives

1.3.9

System BIOS

The system BIOS provides ISA and PCI compatibility. Contained in a flash memory device on the

system board, the BIOS provides both the Power-On Self-Test (POST) and PCI and EIDE auto-

configuration utilities.

The system BIOS is always “shadowed.” Shadowing allows any BIOS routines to be executed from

fast 64-bit onboard DRAM instead of from the slower 8-bit flash device.

PCI Auto-Configuration

The PCI auto-configuration utility works in conjunction with the Setup program to support using PCI

expansion boards in the system. When you turn on the computer power after installing a PCI board,

the BIOS automatically configures interrupts, I/O space, and PCI devices. If problems arise or you

wish to reconfigure the device, refer to Chapter 2, “Compaq Utilities,” which explains how to use the

Setup program. The PCI auto-configuration program complies with version 2.1 of the PCI BIOS

specification.

IDE/EIDE Auto-Configuration

If you install an IDE/EIDE drive into the computer, the IDE/EIDE auto-configuration utility

automatically detects and configures the drive for operation in the computer. This utility eliminates

the need to run the Setup program after you install an IDE/EIDE drive.

ISA Plug and Play Capability

ISA Plug and Play capability provides auto-configuration of Plug and Play ISA boards and resource

management for legacy (non–Plug and Play) ISA boards when used with Computer Setup or a Plug

and Play–compatible operating system like Microsoft’s Windows 95.