Compaq 4000N - Manuals - manualsarea.com

Page 2 - TRG

This hardcopy is designed to be placed into a standard 3-ring binder. Provided below is a title block thatcan be copied and cut out and placed into the slip or taped onto the edge of the binder. Deskpro 4000N and 4000S Personal Computers TRG

Page 3 - NOTICE

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 i NOTICE The information in this document is subject to change without notice. COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OREDITORIAL ERRORS OR OMISSIONS HEREIN; NOR FOR INCI...

Page 4 - Technical Reference Guide; ii

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 ii

Page 5 - iii; TABLE OF CONTENTS

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 iii TABLE OF CONTENTS CHAPTER 1 INTRODUCTION............................................................................................................. 1.1 ABOUT THIS GUIDE .....................

Page 6 - iv

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 iv CHAPTER 4 SYSTEM SUPPORT......................................................................................................... 4.1 INTRODUCTION...............................................

Page 9 - vii

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 vii C.3 SCANNER DESCRIPTION .................................................................................................C-14 C.3.1 SCANNER OPERATION...........................................

Page 10 - LIST OF FIGURES

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 viii LIST OF FIGURES F IGURE 2–1. C OMPAQ D ESKPRO 4000S P ERSONAL C OMPUTER WITH M ONITOR ....................................... 2-1 F IGURE 2–2. C ABINET L AYOUT , F RONT V IEW ................

Page 11 - LIST OF TABLES

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 ix LIST OF TABLES T ABLE 1–1. A CRONYMS AND A BBREVIATIONS ....................................................................................... 1-3 T ABLE 2–1. A RCHITECTURAL C OMPARISON ......

Page 12 - VGA

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 x T ABLE 5–12. S ERIAL I NTERFACE C ONTROL R EGISTERS ........................................................................ 5-17 T ABLE 5–13. P ARALLEL I NTERFACE C ONFIGURATION R EGISTERS ....

Page 13 - Chapter 1 INTRODUCTION

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 1-1 Chapter 1INTRODUCTION 1. Chapter 1 INTRODUCTION 1.1 ABOUT THIS GUIDE This guide provides technical information about the Compaq Deskpro 4000N and 4000SPersonal Computers. This document incl...

Page 14 - Chapter 1 Introduction

Chapter 1 Introduction Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 1-2 1.2 NOTATIONAL CONVENTIONS 1.2.1 VALUES Hexadecimal values are indicated by the letter “h” following an alpha-numerical value. Binaryvalues are indicated by the letter “b” following a value of...

Page 15 - COMMON ACRONYMS AND ABBREVIATIONS; Table 1-1 lists the acronyms and abbreviations used in this guide.; Table 1–1. Acronyms and Abbreviations; Acronyms and Abbreviations; Continued

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 1-3 1.3 COMMON ACRONYMS AND ABBREVIATIONS Table 1-1 lists the acronyms and abbreviations used in this guide. Table 1–1. Acronyms and Abbreviations Table 1-1. Acronyms and Abbreviations Acronym/...

Page 19 - Chapter 2 SYSTEM OVERVIEW; Figure 2–1. Compaq Deskpro 4000S Personal Computer with Monitor

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition -September 2-1 Chapter 2SYSTEM OVERVIEW 2. Chapter 2 SYSTEM OVERVIEW 2.1 INTRODUCTION The Compaq Deskpro 4000N and 4000S Personal Computers are based on Pentiummicroprocessors featuring MMX technology and desig...

Page 20 - Chapter 2 System Overview; FEATURES

Chapter 2 System Overview Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 2-2 2.2 FEATURES This section describes the standard and distinguishing features. 2.2.1 STANDARD FEATURES The following standard features are included on all models: ♦ Pentium microprocessor wi...

Page 21 - MODEL DIFFERENCES

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition -September 2-3 2.2.2 MODEL DIFFERENCES Deskpro 4000N Deskpro 4000S PCI connector: 1 1 (shared slot) ISA connector: none 1 (shared slot) OS installed: Windows NT 4.0 Windows 95 Remote boot support: Yes No Disket...

Page 22 - MECHANICAL DESIGN

Chapter 2 System Overview Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 2-4 2.3 MECHANICAL DESIGN This section illustrates the layout used by the formfactor. In addition, this section includes thelayout of the system board. 2.3.1 CABINET LAYOUT Item Function 1 Powe...

Page 24 - CHASSIS LAYOUT; Front

Chapter 2 System Overview Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 2-6 2.3.2 CHASSIS LAYOUT NOTES: [1] Deskpro 4000S only Figure 2–4. Chassis Layout, Top View Front Back Power Supply Drive Bays System Board ISA Combo Slot 1 [1] PCI Combo Slot 1 Slots On Riser ...

Page 25 - SYSTEM BOARD LAYOUT; Figure 2–5. System Board Layout, Component Side; System Board

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition -September 2-7 2.3.3 SYSTEM BOARD LAYOUT Item Function 1 Graphics monitor connector (J2) 2 Top, Mouse interface connector; Bottom, keyboard connector (J9) 3 NIC AUI connector header (P15) 4 NIC RJ-45 connector ...

Page 26 - SYSTEM ARCHITECTURE; Table 2-1 lists the architectural highlights.; Table 2–1. Architectural Comparison; Architectural Overview

Chapter 2 System Overview Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 2-8 2.4 SYSTEM ARCHITECTURE The Compaq Deskpro 4000N and 4000S Personal Computers featuring MMX technology arebased on a Pentium MXX microprocessor matched with a support chipset that is compli...

Page 28 - MICROPROCESSOR; Figure 2–7. Microprocessor Architectural Diagram; MEMORY

Chapter 2 System Overview Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 2-10 2.4.1 MICROPROCESSOR The Compaq Deskpro 4000N and 4000S Personal Computers feature the Pentium MMXmicroprocessor that is backward-compatible with software written for x86-type processors. ...

Page 29 - SUPPORT CHIPSET; Table 2–2. Support Chipsets; Support Chipsets; MASS STORAGE

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition -September 2-11 2.4.3 SUPPORT CHIPSET Table 2-2 shows the chipsets used for the Deskpro 4000N and 4000S systems. Table 2–2. Support Chipsets Table 2-2. Support Chipsets Function Component Host/PCI (North) Bridg...

Page 30 - UNIVERSAL SERIAL BUS INTERFACE; NOTE: The graphics subsystem is not upgradeable.; Graphics Subsystem Overview

Chapter 2 System Overview Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 2-12 2.4.6 UNIVERSAL SERIAL BUS INTERFACE Two Universal Serial Bus (USB) ports are included, each providing a high speed interface forfuture systems and/or peripherals. The USB interface operat...

Page 31 - SPECIFICATIONS; Table 2–4. Environmental Specifications; Environmental Specifications; Table 2–5. Electrical Specifications; Electrical Specifications; Table 2–6. Physical Specifications; Physical Specifications

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition -September 2-13 2.5 SPECIFICATIONS This section includes the environmental, electrical, and physical specifications for the CompaqDeskpro 4000N and 4000S Series Personal Computers. Table 2–4. Environmental Spec...

Page 32 - Table 2–7. Diskette Drive Specifications; Diskette Drive Specifications; Table 2–8. 8x CD-ROM Drive Specifications; 0x CD-ROM Drive Specifications

Chapter 2 System Overview Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 2-14 Table 2–7. Diskette Drive Specifications Table 2-7. Diskette Drive Specifications Paramemter Measurement Media Type 3.5 in 1.44 MB/720 KB diskette Height 1/3 Bytes per Sector 512 Sectors p...

Page 33 - Table 2–9. Hard Drive Specifications; Hard Drive Specifications

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition -September 2-15 Table 2–9. Hard Drive Specifications Table 2-9. Hard Drive Specifications Parameter 1.6 GB 2.1 GB Interface: EIDE EIDE Drive Type: 65 65 Drive Size: 5.25 in 5.25 in Transfer Rate Heads: Interfac...

Page 34 - This page is intentionally blank.

Chapter 2 System Overview Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 2-16 This page is intentionally blank.

Page 35 - Chapter 3 PROCESSOR/MEMORY SUBSYSTEM; This chapter includes the following topics:; Table 3–1. Processor/Memory Architectural Highlights; Architectural Highlights

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 3-1 Chapter 3PROCESSOR/MEMORY SUBSYSTEM 3. Chapter 3 PROCESSOR/MEMORY SUBSYSTEM 3.1 INTRODUCTION This chapter describes the processor/cache memory subsystem of the Compaq Deskpro 4000Nand 4000S...

Page 36 - Chapter 3 Processor/Memory Subsystem; PENTIUM MMX-BASED PROCESSOR/MEMORY SUBSYSTEM; Figure 3–1. Processor/Memory Subsystem Architecture

Chapter 3 Processor/Memory Subsystem Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 3-2 Mem.Data Bus Mem. Addr. 3.2 PENTIUM MMX-BASED PROCESSOR/MEMORY SUBSYSTEM The processor/memory subsystem is based on the Pentium MMX microprocessor, a 512-KB or 1-MB secondary cac...

Page 37 - PENTIUM MMX MICROPROCESSOR; Figure 3–2. Pentium MMX Microprocessor Internal Architecture; MMX Technology

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 3-3 3.2.1 PENTIUM MMX MICROPROCESSOR The Pentium MMX microprocessor is software-compatible with earlier generation x86microprocessors but provides significantly higher performance due to both h...

Page 38 - BUS/PROCESSING SPEED SELECT; Table 3–3. SW1 Bus/Core Speed Positions to GPIO Assignments

Chapter 3 Processor/Memory Subsystem Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 3-4 3.2.2 BUS/PROCESSING SPEED SELECT The Pentium MMX-based system board includes a four-position DIP switch (SW1) that is used toselect the Host bus frequency and the processing fre...

Page 39 - SYSTEM MEMORY; The system memory uses the following RAS line assignments:; Table 3–4. SDRAM Performance Times; SDRAM Performance Times

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 3-5 3.2.4 SYSTEM MEMORY The system board contains two 168-pin DIMM sockets for system memory. This system isdesigned for using SDRAM DIMMs. As shipped from the factory the standard configuratio...

Page 40 - Access to the DIMM’s EEPROM is through an I

Chapter 3 Processor/Memory Subsystem Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 3-6 Table 3–5. SPD Address Map (SDRAM DIMM) Table 3-5. SPD Address Map (SDRAM DIMM) Byte Description Notes Byte Description Notes 0 No. of Bytes Written Into EEPROM [1] 62 SPD Revisi...

Page 41 - Figure 3–3. System Memory Map

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 3-7 Figure 3-3 shows the system memory map. NOTE: All locations in the 256 megabytes of system memory are cacheable in the L2 cache. Figure 3–3. System Memory Map High BIOS Area (256 KB) Extend...

Page 42 - SUBSYSTEM CONFIGURATION

Chapter 3 Processor/Memory Subsystem Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 3-8 3.2.5 SUBSYSTEM CONFIGURATION The VT82C595 component provides the configuration function for the processor/memorysubsystem. Table 3-6 lists the configuration registers used for s...

Page 43 - Chapter 4 SYSTEM SUPPORT

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-1 Chapter 4SYSTEM SUPPORT 4. Chapter 4 SYSTEM SUPPORT 4.1 INTRODUCTION This chapter covers subjects dealing with basic system architecture and covers the followingtopics: ♦ PCI bus overview (4...

Page 44 - Chapter 4 System Support; PCI BUS OVERVIEW; Figure 4–1. PCI Bus Devices and Functions

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-2 4.2 PCI BUS OVERVIEW NOTE: This section describes the PCI bus in general and highlights busimplementation in this particular system. For detailed information regarding PCI busoperation, refe...

Page 45 - PCI CONNECTOR; Table 4–1. 32-Bit PCI Bus Connector Pinout; PCI Bus Connector Pinout

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-3 4.2.1 PCI CONNECTOR NOTE: See caution below. Figure 4–2. 32-Bit PCI Bus Connector (32-Bit Type) Table 4–1. 32-Bit PCI Bus Connector Pinout Table 4-1. PCI Bus Connector Pinout Pin B Signal A ...

Page 46 - PCI BUS MASTER ARBITRATION; Table 4–2. PCI Bus Mastering Devices; PCI Bus Mastering Devices

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-4 4.2.2 PCI BUS MASTER ARBITRATION The PCI bus supports a bus master/target arbitration scheme. A bus master is a device that hasbeen granted control of the bus for the purpose of initiating a...

Page 47 - PCI BUS TRANSACTIONS

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-5 4.2.3 PCI BUS TRANSACTIONS The PCI bus consists of a 32-bit path (AD31-00 lines) that uses a multiplexed scheme forhandling both address and data transfers. A bus transaction consists of an ...

Page 48 - Figure 4–3. Type 0 Configuration Cycle; PCI Device Configuration Access

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-6 Figure 4-3 shows how the loading of 0CF8h results in a Type 0 configuration cycle on the PCIbus. The Device Number (bits <15..11> determines which one of the AD31..11 lines is to beass...

Page 49 - Table 4–4. PCI Function Configuration Acces; PCI Function Configuration Access; Figure 4–4. PCI Configuration Space Map

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-7 Not required Table 4–4. PCI Function Configuration Acces Table 4-4. PCI Function Configuration Access PCI Function Device No. Function No. Host/PCI Bridge 0 0 PCI/ISA Bridge 7 0 IDE Interfac...

Page 50 - Table 4–5. PCI Device Identification; PCI Device Identification; Special Cycles

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-8 Table 4–5. PCI Device Identification Table 4-5. PCI Device Identification PCI Device Vender ID Device ID VT82C595 (North Bridge) 1106h 0595h VT82C586 (South Bridge): PCI/ISA Bridge (Function...

Page 51 - PCI INTERRUPT MAPPING; PCI Configuration Register 55h, IRQ Routing Reg. 1

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-9 4.2.5 PCI INTERRUPT MAPPING The PCI bus provides for four interrupt signals; INTA-, INTB-, INTC-, and INTD-. Thesesignals may be generated by on-board PCI devices or by devices installed in ...

Page 52 - PCI CONFIGURATION; PCI/ISA Bridge Configuration Registers

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-10 4.2.6 PCI CONFIGURATION PCI bus operations, especially those that involve ISA bus interaction, require the configuration ofcertain parameters such as PCI IRQ routing, top of memory accessab...

Page 53 - ISA BUS OVERVIEW; Figure 4–5. ISA Bus Block Diagram

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-11 4.3 ISA BUS OVERVIEW NOTE: This section describes the ISA bus in general and highlights busimplementation in this particular system. For detailed information regarding ISA busoperation, ref...

Page 54 - ISA CONNECTOR; Figure 4–6. ISA Expansion Connector; ISA Expansion Connector Pinout

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-12 4.3.1 ISA CONNECTOR NOTE: See caution below. Figure 4–6. ISA Expansion Connector Table 4–7. ISA Expansion Connector Pinout Table 4-7. ISA Expansion Connector Pinout Pin Signal Pin Signal Pi...

Page 55 - ISA BUS TRANSACTIONS; The key control signals are described as follows:

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-13 4.3.2 ISA BUS TRANSACTIONS The ISA bus supports 8- and 16-bit transfers at an 8-MHz rate. Devices limited to 8-bit transfersuse the lower byte portion (data lines 7..0) while 16-bit transfe...

Page 57 - DIRECT MEMORY ACCESS; Table 4–8. Default DMA Channel Assignments

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-15 4.3.3 DIRECT MEMORY ACCESS Direct Memory Access (DMA) is a method by which an ISA device accesses system memorywithout involving the microprocessor. DMA is normally used to transfer blocks ...

Page 58 - Page Registers; Table 4–9. DMA Page Register Addresses; The memory address is derived as follows:

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-16 4.3.3.1 Page Registers The DMA page register contains the eight most significant bits of the 24-bit address and worksin conjunction with the DMA controllers to define the complete (24-bit)a...

Page 59 - Table 4–10. DMA Controller Registers; DMA Controller Registers

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-17 The RAM refresh is designed to perform a memory read cycle on each of the 512 row addressesin the DRAM memory space. Refresh operations are used to refresh memory on the 32-bitmemory bus an...

Page 60 - INTERRUPTS; Figure 4–7. Maskable Interrupt Processing, Block Diagram

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-18 4.3.4 INTERRUPTS The microprocessor uses two types of interrupts; maskable and nonmaskable. A maskableinterrupt can be enabled or disabled within the microprocessor by the use of the STI an...

Page 61 - Table 4–11. Maskable Interrupt Priorities and Assignments; Maskable Interrupt Priorities and Assignments; Table 4–12. Maskable Interrupt Control Registers; Maskable Interrupt Control Registers

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-19 Table 4–11. Maskable Interrupt Priorities and Assignments Table 4-11. Maskable Interrupt Priorities and Assignments Priority Signal Label Source (Typical) Notes 1 IRQ0 Interval timer 1, cou...

Page 62 - Non-Maskable Interrupts; Microprocessor internal error (activating IERRA or IERRB); NMI Status Register 61h

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-20 4.3.4.2 Non-Maskable Interrupts Non-maskble interrupts cannot be masked (inhibited) within the microprocessor itself but may bemaskable by software using logic external to the microprocesso...

Page 64 - INTERVAL TIMER; Table 4–13. Interval Timer Functions; Interval Timer Functions; Table 4–14. Interval Timer Control Registers; Interval Timer Control Registers; ISA CONFIGURATION

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-22 4.3.5 INTERVAL TIMER The interval timer generates pulses at software (programmable) intervals. A 8254-compatibletimer is integrated into the South Bridge chip. The timer function provides t...

Page 65 - SYSTEM CLOCK DISTRIBUTION; Clock Generation and Distribution

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-23 4.4 SYSTEM CLOCK DISTRIBUTION The system uses an ICS9147-08 or compatible part for generation of most clock signals. Tables4-15 lists the clock signals and to which components they are dist...

Page 66 - REAL-TIME CLOCK AND CONFIGURATION MEMORY; Figure 4–8. Configuration Memory Map; CMOS

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-24 4.5 REAL-TIME CLOCK AND CONFIGURATION MEMORY The Real-time clock (RTC) and configuration memory functions are provided by the PC87307I/O controller. The RTC uses the first 14 of 256 bytes o...

Page 67 - CONFIGURATION MEMORY BYTE DEFINITIONS; Table 4-16 lists the mapping of the configuration memory.; RTC using internal battery:

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-25 4.5.1 CONFIGURATION MEMORY BYTE DEFINITIONS Table 4-16 lists the mapping of the configuration memory. Table 4–16. Configuration Memory (CMOS) Map Table 4-16. Configuration Memory (CMOS) Map...

Page 68 - RTC Control Register A, Byte 0Ah; RTC Status Register C, Byte 0Ch; RTC Status Register D, Byte 0Dh

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-26 RTC Control Register A, Byte 0Ah Bit Function 7 Update in Progress. Read only. 0 = Time update will not occur before 2444 us 1 = Time update will occur within 2444 us 6..4 Divider Chain Con...

Page 69 - Configuration Byte 0Eh, Diagnostic Status; This byte contains diagnostic status data.; Configuration Byte 0Fh, System Reset Code; This byte contains the system reset code.; Configuration Byte 10h, Diskette Drive Type; Configuration Byte 12h, Hard Drive Type

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-27 Configuration Byte 0Eh, Diagnostic Status Default Value = 00h This byte contains diagnostic status data. Configuration Byte 0Fh, System Reset Code Default Value = 00h This byte contains the...

Page 70 - Configuration Byte 13h, Security Functions; Configuration Byte 14h, Equipment Installed; Configuration Bytes 15h and 16h, Base Memory Size

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-28 Configuration Byte 13h, Security Functions Default Value = 00h Bit Function 7 Reserved 6 QuickBlank Enable After Standby: 0 = Disable 1 = Enable 5 Administrator Password: 0 = Not present 1 ...

Page 71 - Configuration Bytes 19h-1Ch, Hard Drive Types; Configuration Byte 1Fh, Power Management Functions; Configuration Byte 24h, System Board Identification; Configuration memory location 24h holds the system board ID.; Configuration Byte 25h, System Architecture Data

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-29 Configuration Bytes 19h-1Ch, Hard Drive Types Byte 19h contains the hard drive type for drive 1 of the primary controller if byte 12h bits <7..4>hold 1111b. Byte 1Ah contains the hard...

Page 72 - Configuration Byte 26h, Auxiliary Peripheral Configuration; Configuration Byte 28h, Expanded and Base Memory, IRQ12 Select

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-30 Configuration Byte 26h, Auxiliary Peripheral Configuration Default Value = 00h Bit Function 7,6 I/O Delay Select 00 = 420 ns (default) 01 = 300 ns 10 = 2600 ns 11 = 540 ns 5 Alternative A20...

Page 73 - Configuration Byte 2Ah, Hard Drive Timeout; Configuration Byte 2Bh, System Inactivity Timeout; Configuration Byte 2Ch, ScreenSave and NUMLOCK Control

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-31 Default Value = 00h Bit Function 7..5 Reserved 4 Primary Hard Drive Enable (Non-PCI IDE Controllers) 0 = Disable 1 = Enable 3..0 Reserved Configuration Byte 2Ah, Hard Drive Timeout Default ...

Page 74 - Configuration Byte 2Dh, Additional Flags; These bytes hold the checksum of bytes 10h to 2Dh.; Configuration Byte 30h, 31h, Total Extended Memory Tested; Configuration Byte 34h, International Language Support

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-32 Configuration Byte 2Dh, Additional Flags Default Value = 00h Bit Function 7..5 Reserved 4 Memory Test 0 = Test memory on power up only 1 = Test memory on warm boot 3 POST Error Handling (BI...

Page 75 - Configuration Byte 35h, APM Status Flags; Configuration Byte 36h, ECC POST Test Single Bit Errors; These eight locations hold the power-on password.; Configuration Byte 40h, Miscellaneous Disk Data

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-33 Configuration Byte 35h, APM Status Flags Default Value = 11h Bit Function 7..6 Power Conservation State: 00 = Ready 01 = Standby 10 = Suspend 11 = Off 5,4 Reserved 3 32-bit Connection: 0 = ...

Page 76 - Configuration Byte 45h, Keyboard Snoop Data

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-34 Configuration Byte 45h, Keyboard Snoop Data Default Value = xxh Bit Function 7 Cntrl/F10 Key Status: 0 = Cntrl & F10 keys not pressed 1 = Cntrl & F10 keys pressed 6 F10 Key Status: ...

Page 79 - Configuration Byte 92h, Miscellaneous Configuration Byte; Configuration Byte 93h, PCI Configuration Byte; The ISA card is connected to a color monitor.

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-37 Configuration Byte 90h, 91h, Total Super Extended Memory Configured This byte holds the value of the amount of extended system memory that is configured.The amount is given in 64-KB increme...

Page 80 - Configuration Byte 94h, ROM Flash/Power Button Status

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-38 Configuration Byte 94h, ROM Flash/Power Button Status Default Value = 00h Bit Function 7..5 Reserved 4 ROM Flash In Progress (if set) 3 Reserved 2 Power Button Inhibited (ifset) 1 User-Forc...

Page 81 - Configuration Byte 9Dh, ESS Audio Configuration Byte; Configuration Byte 9Eh, ECP DMA Configuration Byte; Configuration Byte 9Fh-AFh, Asset Tag Serial Number

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-39 Configuration Byte 9Dh, ESS Audio Configuration Byte Default Value = 12h Bit Function 7 Reserved for Game Port Enable 6,5 Audio Address 00 = 22xh 01 = 23xh 10 = 24xh 11 = 25xh 4,3 DMA Chann...

Page 83 - I/O MAP AND REGISTER ACCESSING; System I/O Map

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-41 4.6 I/O MAP AND REGISTER ACCESSING This section describes the system I/O map and methods of accessing various system functions. 4.6.1 SYSTEM I/O MAP Table 4–17. System I/O Map Table 4-17. S...

Page 84 - 7307 I/O CONTROLLER CONFIGURATION; Table 4–18. 87307 I/O Controller PnP Standard Control Registers; 7307 I/O Controller PnP Standard Configuration Registers

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-42 4.6.2 87307 I/O CONTROLLER CONFIGURATION The 87307 I/O controller contains various functions such as the keyboard/mouse interfaces,diskette interface, serial interfaces, and parallel interf...

Page 86 - SYSTEM MANAGEMENT SUPPORT; Table 4–19. System Management Control Registers; System Management Control Registers; FLASH ROM WRITE PROTECT

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-44 4.7 SYSTEM MANAGEMENT SUPPORT This section describes the hardware support of functions involving security, safety, identification,and power consumption of the system. System management func...

Page 87 - PASSWORD PROTECTION

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-45 4.7.2 PASSWORD PROTECTION When enabled, the user is prompted to enter the power-on password during POST. If anincorrect entry is made, the system halts and does not boot. The Power-On passw...

Page 88 - Diskette drive; USER SECURITY; keystrokes. This initiates an SMI

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-46 4.7.3 I/O SECURITY The 87307 I/O controller allows various I/O functions to be disabled through configurationregisters. In addition, the configuration registers of the 87307 are further pro...

Page 89 - TEMPERATURE SENSING; Thyst - Hysterious value (level at which the LM75’s output is negated)

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September1997 4-47 4.7.5 TEMPERATURE SENSING Two components (one programmable LM75 and one TC623) are used in monitoring the internaltemperature of the system. The LM75 sensor is mounted in the cavity of the ...

Page 90 - POWER MANAGEMENT

Chapter 4 System Support Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 4-48 4.7.6 POWER MANAGEMENT This system includes hardware support of Advanced Power Management (APM ver. 1.2)firmware and software and is Energy Star-compliant. 4.7.6.1 HARD DRIVE SPINDOWN CONTR...

Page 91 - Chapter 5 INPUT/OUTPUT INTERFACES

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-1 Chapter 5INPUT/OUTPUT INTERFACES 5. Chapter 5 INPUT/OUTPUT INTERFACES 5.1 INTRODUCTION This chapter describes the system’s interfaces that provide input and output (I/O) porting of dataand ...

Page 92 - Chapter 5 Input/Output Interfaces; IDE Configuration Registers; Table 5–1. IDE PCI Configuration Registers; IDE Bus Master Control Registers

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-2 5.2.1.1 IDE Configuration Registers The IDE interface is handled by the 82586 component and configured as a PCI device with busmastering capability. The PCI configuration registers ...

Page 93 - Table 5–3. IDE ATA Control Registers; IDE ATA Control Registers; The following paragraphs describe the IDE ATA control registers.

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-3 5.2.1.3 IDE ATA Control Registers The IDE controller of the 82586 decodes the addressing of the standard AT attachment (ATA)registers for the connected drive, which is where the ATA control...

Page 94 - This register defines either:

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-4 The contents of the Error register are interpreted as a diagnostic status byte after the execution ofa diagnostic command or when the system is initialized. Bit Function 7 Bad Block...

Page 96 - Table 5–4. IDE Controller Commands; IDE Controller Commands

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-6 Command Register, I/O Port 1F7h/177h (Write Only) The IDE controller commands are written to this register. The command write action should beprefaced with the loading of data into ...

Page 98 - IDE CONNECTORS; 0-Pin IDE Connector Pinout

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-8 5.2.2 IDE CONNECTORS This system includes two standard 40-pin connectors and one 50-pin connector for IDE devices.Devices attached to the 40-pin connectors obtain power through a se...

Page 99 - 0-Pin IDE Connector Pinout

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-9 The 50-pin connector is intended for a CD-ROM drive that operates as a slave on the secondaryIDE interface. This interface includes power and audio signals. The 50-pin connector isillustrat...

Page 100 - DISKETTE DRIVE INTERFACE; Execution phase - The controller carries out the command.

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-10 5.3 DISKETTE DRIVE INTERFACE The diskette drive interface supports up to two diskette drives through a standard 34-pin diskettedrive connector. All Deskpro 4000S models include a 3...

Page 101 - DISKETTE DRIVE PROGRAMMING; Table 5–7. Diskette Drive Controller Configuration Registers; Diskette Drive Interface Configuration Registers

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-11 5.3.1 DISKETTE DRIVE PROGRAMMING 5.3.1.1 Diskette Drive Interface Configuration The diskette drive controller must be configured for a specific address and also must be enabledbefore it ca...

Page 102 - Diskette Drive Interface Control; Diskette Drive Interface Control Registers

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-12 5.3.1.2 Diskette Drive Interface Control The BIOS function INT 13 provides basic control of the diskette drive interface. The diskettedrive interface can be controlled by software ...

Page 104 - DISKETTE DRIVE CONNECTOR; Table 5–9. 34-Pin Diskette Drive Connector Pinout; 4-Pin Diskette Drive Connector Pinout

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-14 5.3.2 DISKETTE DRIVE CONNECTOR This system uses a standard 34-pin connector (refer to Figure 5-2 and Table 5-8 for the pinout)for diskette drives. Drive power is supplied through a...

Page 105 - SERIAL INTERFACES; Figure 5–3. Serial Interfaces Block Diagram; DB-9 Serial Connector Pinout

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-15 5.4 SERIAL INTERFACES The serial interfaces transmit and receive asynchronous serial data with external devices. Theserial interface function is provided by the 87307 I/O controller compon...

Page 106 - SERIAL INTERFACE PROGRAMMING; Table 5–11. Serial Interface Configuration Registers; Serial Interface Configuration Registers

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-16 5.4.2 SERIAL INTERFACE PROGRAMMING 5.4.2.1 Serial Interface Configuration The serial interfaces must be configured for a specific address range (COM1, COM2, etc.) andalso must be a...

Page 107 - Serial Interface Control; Table 5–12. Serial Interface Control Registers; Serial Interface Control Registers

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-17 5.4.2.2 Serial Interface Control The BIOS function INT 14 provides basic control of the serial interface. The serial interface canbe controlled by software through the registers listed in ...

Page 109 - This register specifies the data transmission format.; This register controls the modem signal lines

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-19 FIFO Control Register, I/O Port 3FAh/2FAh (Write Only) This write-only register enables and clears the FIFOs and set the trigger level and DMA mode. Bit Function 7,6 Receiver Trigger Level...

Page 110 - This register is not used in this system.

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-20 Line Status Register, I/O Port 3FDh/2FDh (Read Only) This register contains the status of the current data transfer. Bits <2..0> are cleared when read. Bit Function 7 Parity ...

Page 111 - PARALLEL INTERFACE

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-21 5.5 PARALLEL INTERFACE The parallel interface provides connection to a peripheral device that has a compatible interface,the most common being a printer. The parallel interface function is...

Page 112 - ENHANCED PARALLEL PORT MODE

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-22 5.5.2 ENHANCED PARALLEL PORT MODE In Enhanced Parallel Port (EPP) mode, increased data transfers are possible (up to 2 MB/s) dueto a hardware protocol that provides automatic addre...

Page 113 - PARALLEL INTERFACE PROGRAMMING; Table 5–13. Parallel Interface Configuration Registers; Parallel Interface Configuration Registers

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-23 5.5.4 PARALLEL INTERFACE PROGRAMMING 5.5.4.1 Parallel Interface Configuration The parallel interface must be configured for a specific address range (LPT1, LPT2, etc.) andalso must be enab...

Page 114 - Parallel Interface Control; Table 5–14. Parallel Interface Control Registers; Parallel Interface Control Registers

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-24 5.5.4.2 Parallel Interface Control The BIOS function INT 17 provides simplified control of the parallel interface. Basic functionssuch as initialization, character printing, and pr...

Page 115 - This register provides the printer control functions.

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-25 Status Register, I/O Port 379h, Read Only This register contains the current printer status. Reading this register clears the interruptcondition of the parallel port. Bit Function 7 Printe...

Page 116 - A read of this location yields 10h, while writes have no effect.; This register defines the ECP mode functions.

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-26 FIFO Register, I/O Port 7F8h (ECP Mode Only) While in ECP/forward mode, this location is used for filling the 16-byte FIFO with data bytes.Reads have no effect (except when used in...

Page 117 - PARALLEL INTERFACE CONNECTOR; Table 5–15. DB-25 Parallel Connector Pinout

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-27 5.5.5 PARALLEL INTERFACE CONNECTOR Figure 5-4 and Table 5-15 show the connector and pinout of the parallel inrteface connector. Figure 5–5. Parallel Interface Connector (Female DB-25 as vi...

Page 118 - KEYBOARD/POINTING DEVICE INTERFACE

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-28 5.6 KEYBOARD/POINTING DEVICE INTERFACE The keyboard/pointing device interface provides the connection of an enhanced keyboard and amouse using PS/2-type connections. The keyboard/p...

Page 120 - POINTING DEVICE INTERFACE OPERATION; Table 5–17. Keyboard/Mouse Interface Configuration Registers; Keyboard/Mouse Interface Configuration Registers

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-30 5.6.2 POINTING DEVICE INTERFACE OPERATION The pointing device (typically a mouse) connects to a 6-pin DIN-type connector that is identicalto the keyboard connector both physically ...

Page 121 - Output buffer reads

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-31 5.6.3.2 8042 Control The BIOS function INT 16 is typically used for controlling interaction with the keyboard. Sub-functions of INT 16 conduct the basic routines of handling keyboard data ...

Page 122 - CPU Commands To The 8042

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-32 Table 5-18 lists the commands that can be sent to the 8042 by the CPU. The 8042 uses IRQ1 forgaining the attention of the CPU.Table 5–18. CPU Commands To The 8042 Table 5-18. CPU C...

Page 124 - KEYBOARD/POINTING DEVICE INTERFACE CONNECTOR; Figure 5–7. Keyboard or Pointing Device Interface Connector; Table 5–19. Keyboard/Pointing Device Connector Pinout

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-34 5.6.4 KEYBOARD/POINTING DEVICE INTERFACE CONNECTOR There are separate connectors for the keyboard and pointing device. Both connectors are identicalboth physically and electrically...

Page 125 - ETHERNET INTERFACE; Figure 5–8. Ethernet Interface Block Diagram

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-35 5.7 ETHERNET INTERFACE The system board integrates an Ethernet interface that supports both 10 and 100 Mbps Ethernetcommunications using IEEE 802.3 (ISO 8802-3) protocol. Two connection op...

Page 126 - NIC CONFIGURATION/CONTROL

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-36 5.7.1 NIC CONFIGURATION/CONTROL The NIC is a PCI device and configured through PCI configuration space registers. The NIC iscontrolled through I/O registers mapped in the 300h-30Fh...

Page 127 - Table 5–20. USB Interface Configuration Registers

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 5-37 5.8 UNIVERSAL SERIAL BUS INTERFACE The Universal Serial Bus (USB) interface provides up to 12 Mb/s data transfers between the hostsystem and peripherals designed with a compatible USB inte...

Page 128 - USB CONTROL; USB Control Registers; USB CONNECTOR; The USB interface provides two connectors.

Chapter 5 Input/Output Interfaces Compaq Deskpro 4000N and 4000S Personal Computers First Edition – September 1997 5-38 5.8.2 USB CONTROL The USB is controlled through I/O registers as listed in table 5-21.Table 5–21. USB Control Registers Table 5-21. USB Control Registers I/O Addr. Register 00, 01h...

Page 129 - Chapter 6 GRAPHICS SUBSYSTEM; Table 6-1 provides an overview of the graphics subsystem.

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 6-1 Chapter 6GRAPHICS SUBSYSTEM 6. Chapter 6 GRAPHICS SUBSYSTEM 6.1 INTRODUCTION This chapter describes the graphics subsystem. The graphics subsystem is integrated onto thesystem board and ope...

Page 130 - Chapter 6 Graphics Subsystem; SUBSYSTEM DESCRIPTION

Chapter 6 Graphics Subsystem Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 6-2 GraphicsMemory Bus RGB Data Monitor (63..00) 6.2 SUBSYSTEM DESCRIPTION The graphics subsystem consists of the S3 Trio64V2/GX graphics controller and two megabytesof SGRAM for the frame b...

Page 131 - S3 TRIO64V2/GX GRAPHICS CONFIGURATIONS; Extended VGA Display Modes

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 6-3 6.2.2 S3 TRIO64V2/GX GRAPHICS CONFIGURATIONS The Trio64V2/GX-based graphics subsystem directly supports standard CGA, EGA, and VGAmodes. Using the supplied drivers, the controller with this...

Page 132 - S3 TRIO64V2/GX GRAPHICS SUBSYSTEM PROGRAMMING; S3 Trio64V2/GX PCI Configuration Space Registers; Subsystem Control; Standard VGA Mode I/O Mapping

Chapter 6 Graphics Subsystem Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 6-4 6.2.3 S3 TRIO64V2/GX GRAPHICS SUBSYSTEM PROGRAMMING The S3 Trio64V2/GX is compatible with software written for VGA, EGA, and CGA modes.Drivers are supplied for control of graphics (GUI) ...

Page 133 - Table 6–5. S3-Specific Control Register Mapping; MONITOR POWER CONTROL; Monitor Power Management Conditions

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 6-5 Table 6–5. S3-Specific Control Register Mapping Table 6-5. S3-Specific Control Register Mapping I/OAddress Function I/OAddress Function 3x5.2D..3Ch [1] Extended VGA Registers 42E8h, 4AE8h E...

Page 134 - CONNECTORS; Table 6–7. DB-15 Monitor Connector Pinout

Chapter 6 Graphics Subsystem Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 6-6 6.2.5 CONNECTORS The graphics subsystem provides a VGA monitor connector described in the following figure andtable. Figure 6–2. VGA Monitor Connector, (Female DB-15, as viewed from the ...

Page 135 - Chapter 7 POWER SUPPLY AND DISTRIBUTION; Figure 7–1. Power Supply Assembly, Block Diagram

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 7-1 AC Input ToSystemBoard &Drives Chapter 7POWER and SIGNALDISTRIBUTION 7. Chapter 7 POWER SUPPLY AND DISTRIBUTION 7.1 INTRODUCTION This chapter describes the power supply and method of ge...

Page 136 - Chapter 7 Power and Signal Distribution; POWER SUPPLY ASSEMBLY; Table 7-1 shows the specifications for the power supply.

Chapter 7 Power and Signal Distribution Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 7-2 7.2.1 POWER SUPPLY ASSEMBLY The 76-watt power supply assembly is contained in a single unit that features a selectable inputvoltage of 90-132 VAC and 180-264 VAC. The power su...

Page 137 - POWER CONTROL

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 7-3 7.2.2 POWER CONTROL The power supply assembly is controlled digitally by the PS On signal (Figure 7-1). When PS Onis asserted (high), the Power Supply Assembly is activated. When PS On is d...

Page 138 - POWER DISTRIBUTION; Figure 7–2. Power Cable Diagram

Chapter 7 Power and Signal Distribution Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 7-4 7.3 POWER DISTRIBUTION 7.3.1 3.5/5/12 VDC DISTRIBUTION The power supply assembly includes a connector (P1) that mates directly with the system boardconnector (P17) when the as...

Page 139 - LOW VOLTAGE DISTRIBUTION; Figure 7–3. Low Voltage Supply, Block Diagram

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 7-5 7.3.2 LOW VOLTAGE DISTRIBUTION The system board includes a provision for producing 2.5 VDC for microprocessors that requiresuch a level for core power. The low voltage circuitry (Figure 7-3...

Page 140 - SIGNAL DISTRIBUTION; Figure 7–4. Signal Distribution Diagram; System

Chapter 7 Power and Signal Distribution Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 7-6 7.4 SIGNAL DISTRIBUTION Figure 7-4 shows general signal distribution between the main subassemblies of the system unit. NOTES: [1] Deskpro 4000S only[2] No cable used for inte...

Page 141 - Chapter 8 BIOS ROM; Windows for Workgroups 3.11

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-1 Chapter 8BIOS ROM 8. Chapter 8 BIOS ROM 8.1 INTRODUCTION The Basic Input/Output System (BIOS) of the computer is a collection of machine languageprograms stored as firmware in read-only mem...

Page 142 - BOOT FUNCTIONS

Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-2 8.2 BOOT FUNCTIONS The system supports new system boot functions to support remote ROM flashing and PC97requirements. This system also supports the EL Torito specification for bootable CDs. NOTE: ...

Page 143 - ACCESSING CONFIGURATION MEMORY

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-3 8.3 ACCESSING CONFIGURATION MEMORY Configuration memory (CMOS and NVRAM) should be accessed using the appropriate BIOSfunction. The following subsections describe several BIOS functions ava...

Page 144 - ACCESSING CMOS FEATURE BITS

Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-4 8.3.2.1 INT 15, AX=E841h, BL=00h - Set CMOS Defaults This function sets a bit in NVRAM that instructs the BIOS to load NVRAM with default valuesduring the next system boot. The user will not be pr...

Page 145 - CLIENT MANAGEMENT SUPPORT; Client Management Functions (INT15)

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-5 8.4 CLIENT MANAGEMENT SUPPORT Client Management deals with issues of security, identification, and system managementfunctions. A group of BIOS INT 15 functions are provided to support Clien...

Page 147 - SYSTEM ID

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-7 8.4.1 SYSTEM ID The INT 15, AX=E800h BIOS function can be used by software to identify the system. Thesystem ID will be returned in the BX register as follows: Series System ID Deskpro 4000...

Page 152 - TEMPERATURE SENSOR; 720-Intellisafe Hard Drive detects imminent failure

Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-12 8.4.3 TEMPERATURE SENSOR A temperature sensor component is mounted in the cavity of the microprocessor socket. Thissensor component detects when the microprocessor has reached a programmed temper...

Page 153 - DIMM SUPPORT

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-13 8.4.5 DIMM SUPPORT The BIOS includes DIMM support consisting of the following: ♦ Access control with the serial (I 2 C) EEPROM of the DIMM ♦ Runtime information on ECC-correctable single b...

Page 155 - SECURITY FUNCTIONS

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-15 8.4.6 SECURITY FUNCTIONS The INT 15 AX=E829h BIOS function is used to control various security features of the system.This function may be issued remotely (over a network) by a driver. A r...

Page 157 - PNP SUPPORT; PnP BIOS Functions

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-17 8.5 PNP SUPPORT The BIOS includes Plug ’n Play (PnP) support for PnP version 1.0A. NOTE: For full PnP functionality to be realized, all peripherals used in the system mustbe designed as “P...

Page 158 - POWER MANAGEMENT SUPPORT

Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-18 8.6 POWER MANAGEMENT SUPPORT The Compaq Deskpro 2000 system includes Advanced Power Management (APM) BIOS supportthat provides, if so configured, for the automatic shutdown of certain areas withi...

Page 159 - APM BIOS Functions (INT15)

Technical Reference Guide Compaq Deskpro 4000N and 4000S Personal Computers First Edition - September 1997 8-19 Standby - The computer is in a low power state: video is off, some subsystems may be drawingless power, and the microprocessor is halted except for servicing interrupts. Video graphicscont...

Page 161 - Appendix A ERROR MESSAGES AND CODES; Power-On Messages; BEEP CODE MESSAGES; Table A–2. Beep Code Messages; Beep Code Messages

Technical Reference Guide Compaq Personal Computers Changed - Septembe 1997 A-1 Appendix AERROR MESSAGES AND CODES A. Appendix A ERROR MESSAGES AND CODES A.1 INTRODUCTION This appendix lists the error codes and a brief description of the probable cause of the error. Notethat not all errors listed in...

Page 163 - Table A–4. Processor Error Messages; Processor Error Messages

Technical Reference Guide Compaq Personal Computers Changed - Septembe 1997 A-3 A.5 PROCESSOR ERROR MESSAGES (1xx-xx) Table A–4. Processor Error Messages Table A-4. Processor Error Messages Message Probable Cause Message Probable Cause 101-01 CPU test failed 105-08 Port 61 bit <1> not at one 1...

Page 164 - Table A–5. Memory Error Messages; Memory Error Messages; Table A–6. Keyboard Error Messages; Keyboard Error Messages

Appendix A Error Messages and Codes Compaq Personal Computers Changed - September 1997 A-4 A.6 MEMORY ERROR MESSAGES (2xx-xx) Table A–5. Memory Error Messages Table A-5. Memory Error Messages Message Probable Cause 200-04 Real memory size changed 200-05 Extended memory size changed 200-06 Invalid me...

Page 165 - Table A–7. Printer Error Messages; Printer Error Messages

Technical Reference Guide Compaq Personal Computers Changed - Septembe 1997 A-5 A.8 PRINTER ERROR MESSAGES (4xx-xx) Table A–7. Printer Error Messages Table A-7. Printer Error Messages Message Probable Cause Message Probable Cause 401-01 Printer failed or not connected 402-10 Interrupt test and contr...

Page 166 - Table A–9. Diskette Drive Error Messages; Diskette Drive Error Messages; Table A–10. Serial Interface Error Messages; Serial Interface Error Messages

Appendix A Error Messages and Codes Compaq Personal Computers Changed - September 1997 A-6 A.10 DISKETTE DRIVE ERROR MESSAGES (6xx-xx) Table A–9. Diskette Drive Error Messages Table A-9. Diskette Drive Error Messages Message Probable Cause Message Probable Cause 6xx-01 Exceeded maximum soft error li...

Page 167 - Table A–11. Serial Interface Error Messages

Technical Reference Guide Compaq Personal Computers Changed - Septembe 1997 A-7 A.12 MODEM COMMUNICATIONS ERROR MESSAGES (12xx-xx) Table A–11. Serial Interface Error Messages Table A-11. Serial Interface Error Messages Message Probable Cause Message Probable Cause 1201-XX Modem internal loopback tes...

Page 168 - Table A–12. Hard Drive Error Messages; Hard Drive Error Messages

Appendix A Error Messages and Codes Compaq Personal Computers Changed - September 1997 A-8 A.13 HARD DRIVE ERROR MESSAGES (17xx-xx) Table A–12. Hard Drive Error Messages Table A-12. Hard Drive Error Messages Message Probable Cause Message Probable Cause 17xx-01 Exceeded max. soft error limit 17xx-51...

Page 169 - Table A–13. Hard Drive Error Messages; Table A–14. Hard Drive Messages

Technical Reference Guide Compaq Personal Computers Changed - Septembe 1997 A-9 A.14 HARD DRIVE ERROR MESSAGES (19xx-xx) Table A–13. Hard Drive Error Messages Table A-13. Hard Drive Error Messages Message Probable Cause Message Probable Cause 19xx-01 Drive not installed 19xx-21 Got servo pulses seco...

Page 170 - Table A–15. Audio Error Messages; Audio Error Message; Table A–16. Network Interface Error Messages; Network Interface Error Messages

Appendix A Error Messages and Codes Compaq Personal Computers Changed - September 1997 A-10 A.16 AUDIO ERROR MESSAGES (3206-xx) Table A–15. Audio Error Messages Table A-15. Audio Error Message Message Probable Cause 3206-xx Audio subsystem internal error A.17 NETWORK INTERFACE ERROR MESSAGES (60xx-x...

Page 171 - Table A–17. SCSI Interface Error Messages; SCSI Interface Error Messages; Table A–18. Pointing Device Interface Error Messages; Pointing Device Interface Error Messages

Technical Reference Guide Compaq Personal Computers Changed - Septembe 1997 A-11 A.18 SCSI INTERFACE ERROR MESSAGES (65xx-xx, 66xx-xx, 67xx-xx) Table A–17. SCSI Interface Error Messages Table A-17. SCSI Interface Error Messages Message Probable Cause Message Probable Cause 6nyy-02 Drive not installe...

Page 172 - CEMM PRIVILEDGED OPS ERROR MESSAGES; Table A–19. CEMM Privileged Ops Error Messages; CEMM Privileged Ops Error Messages; CEMM EXCEPTION ERROR MESSAGES; Table A–20. CEMM Exception Error Messages; CEMM Exception Error Messages

Appendix A Error Messages and Codes Compaq Personal Computers Changed - September 1997 A-12 A.20 CEMM PRIVILEDGED OPS ERROR MESSAGES Table A–19. CEMM Privileged Ops Error Messages Table A-19. CEMM Privileged Ops Error Messages Message Probable Cause Message Probable Cause 00 LGDT instruction 04 LL3 ...

Page 173 - Appendix B ASCII CHARACTER SET; key and using the Numeric; Alt; ASCII Character Set

Technical Reference Guide Compaq Personal Computers Original - July 1996 B-1 Appendix BASCII CHARACTER SET B. Appendix B ASCII CHARACTER SET B.1 INTRODUCTION This appendix lists, in Table B-1, the 256-character ASCII code set including the decimal andhexadecimal values. All ASCII symbols may be call...

Page 175 - Appendix C KEYBOARD; Topics covered in this appendix include the following:

Technical Reference Guide Compaq Personal Computers Changed - November 1996 C-1 Appendix CKEYBOARD C. Appendix C KEYBOARD C.1 INTRODUCTION This appendix describes the Compaq keyboard that is included as standard with the system unit.The keyboard complies with the industry-standard classification of ...

Page 176 - KEYSTROKE PROCESSING; Figure C–1. Keystroke Processing Elements, Block Diagram

Appendix C Keyboard Compaq Personal Computers Changed - November 1996 C-2 KeyboardInterface(System Unit) Data/ CLK C.2 KEYSTROKE PROCESSING A functional block diagram of the keystroke processing elements is shown in Figure C-1. Power(+5 VDC) is obtained from the system through the PS/2-type interfac...

Page 177 - TRANSMISSIONS TO THE SYSTEM; The enhanced keyboard has three operating modes:

Technical Reference Guide Compaq Personal Computers Changed - November 1996 C-3 C.2.1 TRANSMISSIONS TO THE SYSTEM The keyboard processor sends two main types of data to the system; commands (or responses tosystem commands) and keystroke scan codes. Before the keyboard sends data to the system(specif...

Page 178 - KEYBOARD LAYOUTS

Appendix C Keyboard Compaq Personal Computers Changed - November 1996 C-4 C.2.2 KEYBOARD LAYOUTS C.2.2.1 Standard Enhanced Keyboards Figure C–3. U.S. English (101-Key) Keyboard Key Positions Figure C–4. National (102-Key) Keyboard Key Positions 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 1...

Page 179 - Windows Enhanced Keyboards

Technical Reference Guide Compaq Personal Computers Changed - November 1996 C-5 C.2.2.2 Windows Enhanced Keyboards Figure C–5. U.S. English Windows (101W-Key) Keyboard Key Positions Figure C–6. National Windows (102W-Key) Keyboard Key Positions 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 1...

Page 181 - KEYS

Technical Reference Guide Compaq Personal Computers Changed - November 1996 C-7 C.2.3 KEYS All keys generate a make code (when pressed) and a break code (when released) with theexception of the Pause key (pos. 16), which produces a make code only. All keys, again, with the exception of the Pause key...

Page 182 - Multi-Keystroke Functions

Appendix C Keyboard Compaq Personal Computers Changed - November 1996 C-8 C.2.3.2 Multi-Keystroke Functions Shift - The Shift key (pos. 75/86), when held down, produces a shift state (upper case) for keys in positions 17-29, 30, 39-51, 60-70, and 76-85 as long as the Caps Lock key (pos. 59) is toggl...

Page 183 - Windows Keystrokes; ALT

Technical Reference Guide Compaq Personal Computers Changed - November 1996 C-9 Backspace Spacebar Spacebar Spacebar Backspace Spacebar C.2.3.3 Windows Keystrokes Windows-enhanced keyboards include three additional key positions. Key positions 110 and 111(marked with the Windows logo ) have the same...

Page 184 - KEYBOARD COMMANDS; SCAN CODES; Mode 3 generates a different scan code set from Modes 1 and 2. Code

Appendix C Keyboard Compaq Personal Computers Changed - November 1996 C-10 C.2.4 KEYBOARD COMMANDS Table C-1 lists the commands that the keyboard can send to the system (specifically, to the 8042-type logic). Table C–1. Keyboard-to-System Commands Table C-1. Keyboard-to-System Commands Command Value...

Page 185 - Table C–2. Keyboard Scan Codes; Keyboard Scan Codes

Technical Reference Guide Compaq Personal Computers Changed - November 1996 C-11 Table C–2. Keyboard Scan Codes Table C-2. Keyboard Scan Codes KeyPos. Legend Mode 1 Mode 2 Mode 3 1 Esc 01/81 76/F0 76 08/na 2 F1 3B/BB 05/F0 05 07/na 3 F2 3C/BC 06/F0 06 0F/na 4 F3 3D/BD 04/F0 04 17/na 5 F4 3E/BE 0C/F0...

Page 188 - SCANNER DESCRIPTION; Figure C–9. Scanner Elements, Block Diagram

Appendix C Keyboard Compaq Personal Computers Changed - November 1996 C-14 COM Port(System Unit) AnalogVideoData Motor Cntrl. Serial Data Clocks & LED Cntrl. Digital Video Data 24 VDC Keyboard Unit C.3 SCANNER DESCRIPTION The scanner keyboard, available as an option, integrates a scanner with a ...

Page 189 - SCANNER OPERATION; When Pressed

Technical Reference Guide Compaq Personal Computers Changed - November 1996 C-15 C.3.1 SCANNER OPERATION The scanner requires minimum user interface for normal operation. Insertion of a sheet ofhardcopy activates the scanner. Operating parameters such as resolution, brightness, and motorspeed are pr...

Page 190 - Figure C–10. Scanner operation Flow Chart

Appendix C Keyboard Compaq Personal Computers Changed - November 1996 C-16 Start Yes Scan Image (Image Aquisition) PRNU Correction MTF Correction Resolution Conversion Threshold (Intel.) Algorithm Yes No No ErrorDiffusion Pattern Dither Gamma Conversion Halftone Output Desired? Grayscale Compensatio...

Page 191 - Resolution/Shade Depth; Table C–3. Scanner Performance Chart; Scanner Performance Chart; Image Quality

Technical Reference Guide Compaq Personal Computers Changed - November 1996 C-17 C.3.1.1 Resolution/Shade Depth The drive motor mechanism of the CIS supports a vertical resolution of 400 dpi. The CISprovides a maximum horizontal resolution of 200 dpi. These factors provide true spatialresolutions of...

Page 192 - SCANNER INTERFACE

Appendix C Keyboard Compaq Personal Computers Changed - November 1996 C-18 C.3.2 SCANNER INTERFACE The scanner communicates with the system unit (host) using a serial port as the primary choiceof connection. The scanner interface is adaptable to several types of host connections as shown inTable C-4...

Page 193 - Pnyb Mode

Technical Reference Guide Compaq Personal Computers Changed - November 1996 C-19 C.3.2.1 Pnyb Mode In the parallel nibble or “Pnyb” mode, the scanner transfers scanned information to the systemunit (host) four bits (a nibble) at a time using the P3..P0 signals, which conform to RS-232voltage and tim...

Page 194 - SCANNER SPECIFICATIONS/REQUIREMENTS; Table C–5. Scanner Specifications; Scanner Specifications; 86 or better microprocessor

Appendix C Keyboard Compaq Personal Computers Changed - November 1996 C-20 C.3.3 SCANNER SPECIFICATIONS/REQUIREMENTS Table C–5. Scanner Specifications Table C-5. Scanner Specifications Parameter Specification [1] Dimensions (Complete keyboard unit): Width Height Depth 20.5 in (52.07 cm) 2.5 in (6.35...

Page 195 - INDEX

Technical Reference Guide Compaq Deskpro 2000 Personal Computers with MMX Technology First Edition – July 1997 I-1 INDEX I. abbreviations, 1-3acronyms, 1-3administrator password, 4-44analog-to-digital converter (ADC), D-4APM BIOS functions, 8-19architecture, system, 2-8ASCII character set, B-1AT att...