Page 1: Technical Reference
Technical Reference Guide For the Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models...
Page 2 This hardcopy is designed to be placed into a standard 3-ring binder. Provided below is a title block that can be copied and cut out and placed into the slip or taped onto the edge of the binder. Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models TRG...
Page 3 For more information regarding specifications and Compaq-specific parts please contact Compaq Computer Corporation, Industry Relations Department. Technical Reference Guide Compaq Deskpro EN Series of Personal Computers, Net PC and Small Form Factor Models First Edition – June 1998 Document Number DSK-008A/0698...
Page 4 Technical Reference Guide Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 5: Table Of Contents
CHAPTER 3 PROCESSOR/MEMORY SUBSYSTEM ..............3-1 INTRODUCTION........................3-1 PROCESSOR/MEMORY SUBSYSTEM ................3-2 3.2.1 INTEL PENTIUM II PROCESSOR................3-3 3.2.2 SYSTEM MEMORY...................... 3-6 3.2.3 SUBSYSTEM CONFIGURATION................. 3-9 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 6 DISKETTE DRIVE PROGRAMMING ................ 5-10 5.3.2 DISKETTE DRIVE CONNECTOR................5-13 SERIAL INTERFACES ....................... 5-14 5.4.1 RS-232 INTERFACE ....................5-14 5.4.2 SERIAL INTERFACE PROGRAMMING ..............5-15 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 7 CONTROL........................6-5 MONITOR POWER MANAGEMENT CONTROL ............... 6-6 CONNECTORS ........................6-6 6.6.1 MEMORY EXPANSION CONNECTOR ............... 6-6 6.6.2 MONITOR CONNECTOR..................... 6-7 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 8 KEYBOARD ERROR MESSAGES (30 ) ............... A-4 PRINTER ERROR MESSAGES (4 ) ................A-5 VIDEO (GRAPHICS) ERROR MESSAGES (5 ) ............A-5 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 9 KEYSTROKE PROCESSING....................C-2 C.2.1 TRANSMISSIONS TO THE SYSTEM ................C-3 C.2.2 KEYBOARD LAYOUTS ....................C-4 C.2.3 KEYS..........................C-6 C.2.4 KEYBOARD COMMANDS...................C-9 C.2.5 SCAN CODES .......................C-9 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 10: List Of Figures
IGURE OLTAGE UPPLY LOCK IAGRAM 7–4. S ..................7-7 IGURE IGNAL ISTRIBUTION IAGRAM 7–5. H ......................7-8 IGURE EADER INOUTS viii Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 11 EYBOARD OSITIONS C–5. U.S. E (101W-K ........C-5 IGURE NGLISH INDOWS EYBOARD OSITIONS C–6. N (102W-K ........C-5 IGURE ATIONAL INDOWS EYBOARD OSITIONS Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 12: List Of Tables
RIVE ONTROLLER EGISTERS 5–8. 34-P ..............5-13 ABLE ISKETTE RIVE ONNECTOR INOUT 5–9. DB-9 S ................... 5-14 ABLE ERIAL ONNECTOR INOUT Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 13 NTERFACE RROR ESSAGES A–19. CEMM P ..............A-12 ABLE RIVILEGED RROR ESSAGES A–20. CEMM E ................. A-12 ABLE XCEPTION RROR ESSAGES Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 14 Technical Reference Guide C–1. K .................C-9 ABLE EYBOARD YSTEM OMMANDS C–2. K ....................C-10 ABLE EYBOARD ODES Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 15: Chapter 1 Introduction
1. Chapter 1 INTRODUCTION ABOUT THIS GUIDE This guide provides technical information about the Compaq Deskpro EN Series of Net PC and Small Form Factor Personal Computers. This document includes information regarding system design, function, and features that can be used by programmers, engineers, technicians, and system administrators.
Page 16: Notational Conventions
Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 17: Common Acronyms And Abbreviations
Compaq system management / Compaq server management Configure to order direct access arrangement digital-to-analog converter decibel direct current DOS compatibility hole Display Data Channel direction flag Continued Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 18 Kb / KB kilobits / kilobytes (x 1024 bits / x 1024 bytes) Kb/s kilobits per second kilogram kilohertz kilovolt Continued Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 19 (monitor input) Relative humidity root mean square read-only memory revolutions per minute real time clock read/write Continued Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 20 VLSI very large scale integration VRAM Video RAM watt Wake on LAN WRAM Windows RAM zero flag zero insertion force (socket) Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 21: Chapter 2 System Overview
Chapter 2 SYSTEM OVERVIEW INTRODUCTION The Compaq Deskpro EN Series of Net PC and Small Form Factor Personal Computers (Figure 2-1) delivers an outstanding combination of manageability, serviceability, and consistency for enterprise environments. Based on Intel Pentium II processors, the Deskpro EN Series emphasizes performance, industry, compatibility, and low total cost of ownership.
Page 22: Features And Options
♦ Pentium II processor with 512 KB second-level cache ♦ Integrated ATI RAGE PRO 3D AGP graphics controller ♦ Integrated Compaq Premier Sound system: 16-bit full-duplex audio ♦ Extended IDE controller support for up to two IDE drives ♦ Hard drive fault prediction ♦...
Page 23: Options
4-MB SODIMM Compaq Deskpro Computers are easily upgraded and enhanced with peripheral devices designed to meet PCI and ISA standards. The Compaq Deskpro Personal Computers are compatible with peripherals design for Plug ’n Play operation. Compaq Deskpro EN Series of Personal Computers...
Page 24: Mechanical Design
NOTES: [1] Small Form Factor only [2] Front panel access on Small Form Factor only. Figure 2–2. Cabinet Layout, Front View Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 25: Figure 2-3. Cabinet Layout , R
Network Interface RJ-45 Connector Mouse Connector Serial Interface Connector (COM2) Keyboard Connector Mouse Connector Keyboard Connector Monitor Interface Figure 2–3. Cabinet Layout, Rear View Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition June 1998...
Page 26: Chassis Layout
Small Form Factor Rear View Backplane, Rear View Back Power Supply System Board Drive Bays Front Figure 2–4. Desktop Chassis Layout, Top View Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 27: Board Layouts
PCI Slot 1 RTC/CMOS battery PCI Slot 2 CMOS clear/battery replacement jumper ISA Slot (PCA #009569-001 only) Figure 2–5. Board Connector and Switch Locations Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition June 1998...
Page 28: System Architecture
Chapter 2 System Overview SYSTEM ARCHITECTURE The architecture of Compaq Deskpro EN Series of Net PC and Small Form Factor Personal Computers is based on the Intel Pentium II processor matched with the Intel 440BX AGPset. The basic architecture (Figure 2-7), uses three main buses: the Host bus, the Peripheral Component Interconnect (PCI) bus, and the Industry Standard Architecture (ISA) bus.
Page 29 CDS models only. Small Form Factor model only. 3200 and 6400 models only 4300 models only Figure 2–6. System Architecture, Block diagram Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition June 1998...
Page 30: Pentium Ii Processor
EV data. The BIOS is updateable by remote or local flashing of the ROM, which includes boot block ROM support. 2-10 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 31: Support Chipset
EIDE devices the chassis can physically only support two EIDE devices. A 24X CD-ROM (using the secondary IDE interface) is included on CDS models. Compaq Deskpro EN Series of Personal Computers 2-11 Net PC and Small Form Factor Models...
Page 32: Serial And Parallel Interfaces
A Line Out jack allows the connection of external powered speakers for enhanced sound. The audio subsystem is compatible with software written for industry-standard sound hardware. 2-12 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 33: Specifications
Technical Reference Guide SPECIFICATIONS This section includes the environmental, electrical, and physical specifications for the Compaq Deskpro EN Series Net PC and Small Form Factor Personal Computers. Table 2–4. Environmental Specifications Table 2-4. Environmental Specifications Parameter Operating Nonoperating Air Temperature...
Page 34 790 +/- 25 nm Average Access Time: Random 100 ms Full Stroke 200 ms Audio Output Level 0.7 Vrms Cache Buffer 128 KB 2-14 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 35 # of Data Heads # of Sectors per Track Buffer Size 256 KB 256 KB Drive Fault Prediction SMART II SMART II Compaq Deskpro EN Series of Personal Computers 2-15 Net PC and Small Form Factor Models First Edition June 1998...
Page 36 Chapter 2 System Overview This page is intentionally blank. 2-16 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 37: Chapter 3 Processor/Memory Subsystem
PROCESSOR/ MEMORY SUBSYSTEM Chapter 3 PROCESSOR/MEMORY SUBSYSTEM INTRODUCTION This chapter describes the processor/cache memory subsystem of the Compaq Deskpro EN Series of NetPC and Small Form Factor Personal Computers. This chapter includes the following topics: ♦ Processor/memory subsystem [3.2] page 3-2 Table 3-1 lists the key parameters of the processor/memory subsystem.
Page 38: Processor/Memory Subsystem
64-bit memory data bus. The 82443BX supports SDRAM, EDO, FPM, and ECC DIMM modules. Two DIMM sockets allow the system memory to be expanded to 256 megabytes. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 39: Intel Pentium Ii Processor
NOTE: MMX operations utilize a portion of the floating point registers of the integrated math coprocessor. Programmers should avoid the mixing of MMX and floating point code, which would reduce performance. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 40: Thermal Considerations
LED will blink at a 4- Hz rate. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 41 Configuring for a speed higher than that which the processor is designed could result in unreliable operation and possible system damage. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 42: System Memory
The supported format complies with the JEDEC specification for 128-byte EEPROMs. This system also provides support for 256-byte EEPROMs to include additional Compaq-added features such as part number and serial number. The SPD format as supported in this system is shown in Table 3-3.
Page 43 [7] Field format proposed to JEDEC but not defined as standard at publication time. [8] Field specified as optional by JEDEC but required by this system. [9] Compaq usage. This system requires that the DIMM EEPROM have this space available for reads/writes.
Page 44: Figure 3-3. System Memorym
DRAM or to PCI space. Graphics RAM area is mapped to PCI or AGP locations. Figure 3–3. System Memory Map Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 45: Subsystem Configuration
Fixed DRAM Hole Low Priority Timer NOTES: Refer to Intel Inc. documentation for detailed description of registers. Assume unmarked locations/gaps as reserved. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 46 Chapter 3 Processor/Memory Subsystem This page is intentionally blank. 3-10 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 47: Chapter 4 System Support
This chapter covers functions provided by off-the-shelf chipsets and therefore describes only basic aspects of these functions as well as information unique to the Compaq Deskpro EN Series of NetPC and Small Form Factor Personal Computers. For detailed information on specific components, refer to the applicable manufacturer’s documentation.
Page 48: Pci Bus Overview
Manage Function Function Function Function 82371 South Bridge ISA Bus 100-MHz slot 1system board only Figure 4–1. PCI Bus Devices and Functions Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 49: Pci Connector
AD21 AD20 ACK64- REQ64- AD32 AD19 +5 VDC +5 VDC Reserved Reserved +3.3 VDC AD18 +5 VDC +5 VDC Reserved Reserved Compaq Deskpro EN Series o Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 50: Pci Bus Master Arbitration
The 82443 and the 82371 support the passive release mechanism, which reduces PCI bus latency caused by an ISA initiator owning the bus for long periods of time. Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models...
Page 51: Pci Bus Transactions
PCI device. 7..2 Register Index. Specifies config. reg. Configuration Cycle Type ID. 00 = Type 0 01 = Type 1 Compaq Deskpro EN Series o Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 52: Figure 4-3. Type 0 Configuration
The function number (CF8h, bits <10..8>) is used to select a particular function within a multifunction device. Configurable functions present in system as shipped from the factory are listed in Table 4-4. Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 53 Group) and a device ID (assigned by the vender). The device and vender IDs for the devices used in these systems are listed in Table 4-5. Compaq Deskpro EN Series o Personal Computers Net PC and Small Form Factor Models...
Page 54: Option Rom Mapping
ROM. Such option ROM data, if detected, is loaded into system memory’s DOS compatibility area (refer to the system memory map shown in chapter 3). Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 55: Pci Interrupt Mapping
PCI Power Management Enable (PME-) signal is supported by the 440BX chipset and allows PCI peripherals (and a compliant AGP graphics adapter) to initiate the power management routine. Compaq Deskpro EN Series o Personal Computers Net PC and Small Form Factor Models...
Page 56: Pci Configuration
DMA 4-7 Base PTR PCI Interrupt Routing B0-B3h GPIO/Misc. Funct. Select PCI Interrupt Routing RTC/RAM Control NOTE: Assume unmarked locations/gaps as reserved. 4-10 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 57: Agp Bus Overview
FRAME- signal. There are two basic types of transactions on the AGP bus: data requests (addressing) and data transfers. These actions are separate from each other. Compaq Deskpro EN Series o Personal Computers 4-11 Net PC and Small Form Factor Models...
Page 58 “001” indicating high priority. GNT- TRDY- ST0..2 Figure 4–5. AGP 1X Data Transfer (Peak Transfer Rate: 266 MB/s) 4-12 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 59 AD_STBx while D1B is latched by the falling edge of AD_STBx-. D3B D4A D4B AD_STBx AD_STBx- ST0..2 AGP 4X Data Transfer (Peak Transfer Rate: 1064 MB/s) Compaq Deskpro EN Series o Personal Computers 4-13 Net PC and Small Form Factor Models First Edition - June 1998...
Page 60: Agp Configuration
Assume unmarked locations/gaps as reserved. Refer to Intel documentation for detailed register descriptions. The AGP graphics adapter (actually its resident controller) is configured as a standard PCI device. 4-14 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 61: Isa Bus Overview
NOTE: This section describes the ISA bus in general and highlights bus implementation in this particular system. For detailed information regarding ISA bus operation, refer to the Compaq Extended Industry Standard Architecture (EISA) Technical Reference Guide. The industry standard architecture (ISA) bus provides an 8-/16-bit path for standard I/O peripherals as well as for optional devices that can be installed in the ISA expansion slots.
Page 62: Isa Connector
DAK1 SA14 GRAB- SD14 DRQ1 SA13 SD15 REFRESH- SA12 BCLK SA11 IRQ7 SA10 IRQ6 IRQ5 IRQ4 IRQ3 DAK2- BALE +5 VDC 4-16 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 63: Isa Bus Transactions
Bus Address Latch Enable (BALE) signal is held active for the duration of the operation. As a result, signals LA23..17 are always enabled and must be held stable for the duration of each bus cycle. Compaq Deskpro EN Series o Personal Computers 4-17 Net PC and Small Form Factor Models...
Page 64 ♦ The logic-high voltage at the bus ranges from 3.75 VDC to 5.5 VDC. The logic low voltage ranges from 0 VDC to 0.8 VDC. 4-18 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 65: Direct Memory Access
NOTE: This section describes DMA in general. For detailed information regarding DMA operation, refer to the Compaq Extended Industry Standard Architecture (EISA) Technical Reference Guide. Note, however, that EISA enhancements as described in the referenced document are not supported in this (ISA only) system.
Page 66 ♦ The size of the the block of data that can be moved or addressed is measured in 16-bits (words) rather than 8-bits (bytes). ♦ The words must always be addressed on an even boundary. 4-20 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 67 Reset Mask Register (Command) 00Eh 0DCh NOTE: For a detailed description of the DMA registers, refer to the Compaq EISA Technical Reference Guide . Compaq Deskpro EN Series o Personal Computers 4-21 Net PC and Small Form Factor Models First Edition - June 1998...
Page 68: Interrupts
If more than one interrupt is pending, the highest priority (lowest number) is processed first. 4-22 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 69 Initialization Command Word 2-4, Int. Cntlr. 2 The initialization and operation of the interrupt control registers follows standard AT-type protocol. Compaq Deskpro EN Series o Personal Computers 4-23 Net PC and Small Form Factor Models First Edition - June 1998...
Page 70 NMI-. Note that the lower six bits of register at I/O port 70h affect RTC operation and should be considered when changing NMI- generation status. 4-24 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 71 APM BIOS to service the SMI- according to the cause of the timeout. Although the SMI- is primarily used for power managment the interrupt is also employed for the QuickLock/QuickBlank functions as well. Compaq Deskpro EN Series o Personal Computers 4-25 Net PC and Small Form Factor Models...
Page 72: Interval Timer
Read or write value, counter 2 043h Control Word Interval timer operation follows standard AT-type protocol. For a detailed description of timer registers and operation, refer to the Compaq Extended Industry Standard Architecture Expansion Bus Technical Reference Guide. 4.4.6 ISA CONFIGURATION The working relationship between the PCI and ISA buses requires that certain parameters be configured.
Page 73: System Clock Distribution
ISA slots 32.77 KHz Crystal 82371South Bridge, 87307I/O Cntlr. NOTE: [1] Depending on processor speed (refer to Chapter 3, “Processor/Memory Subsystem”). Compaq Deskpro EN Series o Personal Computers 4-27 Net PC and Small Form Factor Models First Edition - June 1998...
Page 74: Real-Time Clock And Configuration Memory
The battery is located in a battery holder on the system board and has a life expectancy of four to eight years. When the battery has expired it is replaced with a Renata CR2032 or equivalent 3- VDC lithium battery. 4-28 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 75 2. Remove jumper from pins 1 and 2 of header E50 and place on pins 2 and 3 for 15 seconds. 3. Replace jumper to original configuration (pins 1 and 2). 4. Re-connect AC power cord to the chassis and turn unit on. Compaq Deskpro EN Series o Personal Computers 4-29 Net PC and Small Form Factor Models...
Page 76 RTC Status Register D, Byte 0Dh Function RTC Power Status 0 = RTC has lost power 1 = RTC has not lost power 6..0 Reserved 4-30 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 77 1101 = Type 13 0110 = Type 6 1110 = Type 14 0111 = Type 7 1111 = other (use bytes 1Ah) Compaq Deskpro EN Series o Personal Computers 4-31 Net PC and Small Form Factor Models First Edition - June 1998...
Page 78 Configuration Bytes 17h and 18h, Extended Memory Size Bytes 17h and 18h hold a 16-bit value that specifies the extended memory size in 1-KB increments. 4-32 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 79 1 = Not allowed Reserved Diagnostic Status Byte Address 00 = Memory locations 80C00000h-80C00004h 01 = I/O ports 878h-87Ch 11 = neither place Compaq Deskpro EN Series o Personal Computers 4-33 Net PC and Small Form Factor Models First Edition - June 1998...
Page 80 Internal Compaq Memory: 00000 = None 00001 = 512 KB 00010 = 1 MB 00011 = 1.5 MB 11111 = 15.5 MB 4-34 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 81 0 = No screen blank 1 = Screen blank w/QuickLock 4..0 ScreenSave Timeout. (Index to SIT monitor timeout record) 000000 = Disabled Compaq Deskpro EN Series o Personal Computers 4-35 Net PC and Small Form Factor Models First Edition - June 1998...
Page 82 Standard Numeric Coprocessor Present: 0 = Not installed, 1 = Installed 3..0 Reserved Configuration Byte 34h, International Language Support Default Value = 00h 4-36 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 83 Byte 41h, month & day Byte 42h, year and month Byte 43h, minutes and seconds Byte 44h, removal flag and minutes Compaq Deskpro EN Series o Personal Computers 4-37 Net PC and Small Form Factor Models First Edition - June 1998...
Page 84 ECC Status for DIMM 3 ECC Status for DIMM 2 ECC Status for DIMM 1 ECC Status for DIMM 0 3..0 Reserved 4-38 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 85 Configuration Byte 81h, 82h, Total Super Extended Memory Tested This byte holds the value of the amount of extended system memory that tested good during POST. The amount is given in 64-KB increments. Compaq Deskpro EN Series o Personal Computers 4-39 Net PC and Small Form Factor Models...
Page 86 These bytes hold the APM timer values: Byte 8Ah, minutes Byte 8Bh, hours Byte 8Ch, day Byte 8Dh, month Byte 8Eh, year Byte 8Fh, century 4-40 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 87 ♦ The ISA card uses the RAMDAC on the PCI card ♦ The palette snooping feature (sometimes called “RAMDAC shadowing”) on the PCI card is enabled and functioning properly. Compaq Deskpro EN Series o Personal Computers 4-41 Net PC and Small Form Factor Models...
Page 88 1 = Enable Secondary Hard Drive Controller IRQ 00 = IRQ10 01 = IRQ11 10 = IRQ12 11 = IRQ15 Reserved 4-42 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 89 No. of Cylinders, Low Byte No. of Cylinders, High Byte No. of Heads Max ECC Bytes No. of Sectors Per Track Compaq Deskpro EN Series o Personal Computers 4-43 Net PC and Small Form Factor Models First Edition - June 1998...
Page 90 Configuration Bytes CAh, DBh; Chassis Serial Number Configuration Bytes DEh, DFh; Checksum of Locations 90h-DDh Configuration Bytes E0h-FFh; Client Management Error Log 4-44 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 91: I/O Map And Register Accessing
0CFCh PCI Configuration Data (byte, word, or dword access) FF00..FF07h IDE Bus Master Register NOTE: Assume unmarked gaps are reserved/unused. Compaq Deskpro EN Series o Personal Computers 4-45 Net PC and Small Form Factor Models First Edition - June 1998...
Page 92: Gpio Utilization
Processor thermal caution status: 0 = not occurred, 1 = occurred. GPI #21 Themal sensor: 0 = diode connected, 1 = diode not connected. 4-46 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 93 GPO #20 Power management suspend control signal. GPO #21 Not used. GPO #22, 23 X-bus control signals. GPO #24-30 Not used. Compaq Deskpro EN Series o Personal Computers 4-47 Net PC and Small Form Factor Models First Edition - June 1998...
Page 94 07h and writing the desired offset to the index register. The data is then either written to or read from the data register. 4-48 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 95 Write 1, ring detected 2..0 GPIO22..20 Not Available GPIO Port 2 Direction/Output Type/PU Cntrl., I/O Addr. 07D-07Fh, (87307 I/O Controller) Compaq Deskpro EN Series o Personal Computers 4-49 Net PC and Small Form Factor Models First Edition - June 1998...
Page 96: System Management Support
Super I/O Write Block 2 Super I/O Write Block 3 The following subsections describe the system management functions. Any BIOS interaction required of these functions is described in Chapter 8, “BIOS” or in the Compaq BIOS Technical Reference Guide. 4-50...
Page 97: Flash Rom Write Protect
Box* logic. Black Box logic acting as the sentry for the administrator password by preventing inadvertent or unauthorized writing to the Flash ROM. Black Box logic is Compaq-proprietary and controlled exclusively through the BIOS ROM. Compaq Deskpro EN Series o Personal Computers...
Page 98: I/O Security
. NOTE: Although the SMI is used for initiating QuickLock/QuickBlank functions, these functions are not considered power management features. 4-52 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 99: Temperature Sensing
Function 7..3 Reserved Temperature Deadly Shutdown Disable: 0 = Initiate shutdown w/deadly condition. 1 = Do not initiate shutdown. Reserved Compaq Deskpro EN Series o Personal Computers 4-53 Net PC and Small Form Factor Models First Edition - June 1998...
Page 100: Smart Cover Lock
Upon power up, system board logic will, if the backplane is not present, cause the power and hard drive LEDs to blink at a 3-Hz rate. 4-54 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 101: Power Management
The fan is on during normal operation. In sleep mode the power supply fan is (normally) shut down by software using logic in a System Security ASIC, which asserts a FAN OFF signal routed to the power supply assembly. Compaq Deskpro EN Series o Personal Computers 4-55 Net PC and Small Form Factor Models...
Page 102: Monitor Power Control
HSYNC and VSYNC signals of the monitor interface to select a monitor’s power condition. This capability is provided by the graphics subsystem and is discussed in chapter 6. 4-56 Compaq Deskpro EN Series of Personal Computers NetPC and Small Form Factor Models First Edition - June 1998...
Page 103: Chapter 5 Input/Output Interfaces
Refer to chapter 2 for drive bay accommodations. 5.2.1 IDE PROGRAMMING The IDE interface is configured as a PCI device and controlled through standard I/O mapped registers. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 104 0000 0000h Bus Master IDE Command (Secondary) Bus Master IDE Status (Secondary) Bus Master IDE Descriptor Ptr (Sec.) 0000 0000h 5-2 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 105 The contents of this register are valid when the following conditions exist: ♦ Error bit is set in the Status register ♦ Hard drive controller has completed execution of its internal diagnostics Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 106 1F5h (bits <2..0>) while the remaining bits are held in location 1F4h. 5-4 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 107 The alternate Status register at location 3F6h holds the same status data as location 1F7h but does not clear hardware conditions when read. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 108 The alternate Status register at location 3F6h holds the same status data as location 1F7h but does not clear hardware conditions when read. 5-6 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 109 1111 = 0 Drive Select: 00 = Disabled 01 = Drive 1 selected 10 = Drive 0 selected 11 = Invalid Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 110: Ide Connector
[1] Primary connector wired to IRQ14, secondary connector wired to IRQ15. [2] Pin 39 is used for spindle sync and drive activity (becomes SPSYNC/DACT-) when synchronous drives are connected. 5-8 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 111: Diskette Drive Interface
Result phase, in which case the Execution phase can be followed by a Command phase. During periods of inactivity, the diskette drive controller is in a non-operation mode known as the Idle phase. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 112: Diskette Drive Programming
Base Address MSB Base Address LSB Interrupt Select Interrupt Type DMA Channel Select Report DMA Assignment Configuration Data Drive ID 5-10 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 113 0 = Reset controller, 1 = Enable controller Drive Select 00 = Drive 1 01 = Drive 2 10 = Reserved 11 = Tape drive Compaq Deskpro EN Series of Personal Computers 5-11 Net PC and Small Form Factor Models First Edition - June 1998...
Page 114 01 = 300 Kb/s 10 = 250 Kb/s 11 = 1 or 2 Mb/s (depending on TUP reg. Bit <1>) 5-12 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 115: Diskette Drive Connector
Head select (side 0 or 1) MTR 2 ON- Activates drive motor Ground Ground DSK CHG- Drive door opened indicator Compaq Deskpro EN Series of Personal Computers 5-13 Net PC and Small Form Factor Models First Edition - June 1998...
Page 116: Serial Interfaces
Clear To Send Data Terminal Ready Ring Indicator Ground Each DB-9 port is independently configurable as to it’s COMn (address) designation. 5-14 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 117: Serial Interface Programming
04h / 04h Report DMA Assignment 04h / 04h Configuration Data NOTES: [1] Device 5 (UART2) / Device 6 (UART1) Compaq Deskpro EN Series of Personal Computers 5-15 Net PC and Small Form Factor Models First Edition - June 1998...
Page 118: Table 5-11. Serial Interface
When read by the CPU, this byte contains receive data. When written to by the CPU, the byte contains data to be transmitted. 5-16 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 119 011 = Receiver line status reg. 100,101 = Reserved 110 = Character time-out (highest priority) 111 = Reserved Interrupt Pending (if cleared) Compaq Deskpro EN Series of Personal Computers 5-17 Net PC and Small Form Factor Models First Edition - June 1998...
Page 120 Internal Loopback Enabled (if set) Serial Interface Interrupts Enabled (if set) Reserved RTS Signal Active (if set) DTR Signal Active (if set) 5-18 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 121 CTS- Has Changed State Since Last Read Scratch Pad Register, I/O Port 3FFh/2FFh This register is not used in this system. Compaq Deskpro EN Series of Personal Computers 5-19 Net PC and Small Form Factor Models First Edition - June 1998...
Page 122: Parallel Interface
The SPP mode uses three registers for operation: the Data register (DTR), the Status register (STR) and the Control register (CTR). Address decoding in SPP mode includes address lines A0 and A1. 5-20 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 123: Enhanced Parallel Port Mode
ECP allow the parallel port to be controlled by software. In these modes, the FIFO is cleared and not used, and DMA and RLE are inhibited. NOTE: The 87307 does not support ECP v1.7 submode of ECP mode 4. Compaq Deskpro EN Series of Personal Computers 5-21 Net PC and Small Form Factor Models...
Page 124: Parallel Interface Programming
I/O Range Check Base Address MSB Base Address LSB Interrupt Select Interrupt Type DMA Channel Select Report DMA Assignment Configuration Data 5-22 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 125: Table 5-13. Parallel Interface
In ECP mode in the forward (output) direction, a write to this location places a tagged command byte into the FIFO and reads have no effect. Compaq Deskpro EN Series of Personal Computers 5-23 Net PC and Small Form Factor Models...
Page 126 These registers are used for reading/writing data. Port 0 is used for all transfers. Ports 1-3 are used for transferring the additional bytes of 16- or 32-bit transfers through port 0. 5-24 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models...
Page 127 1 = Full FIFO Empty Status (Read Only) 0 = Not empty (contains at least 1 byte) 1 = Empty Compaq Deskpro EN Series of Personal Computers 5-25 Net PC and Small Form Factor Models First Edition - June 1998...
Page 128: Parallel Interface Connector
Ground Data 5 Ground Data 6 Ground Data 7 Ground ACK- Acknowledge Ground Busy Ground Paper End Ground SLCT Select 5-26 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 129: Keyboard/Pointing Device Interface
8 us 20 us Tsh (Stop Bit Hold) 15 us 25 us Figure 5–6. 8042-To-Keyboard Transmission of Code EDh, Timing Diagram Compaq Deskpro EN Series of Personal Computers 5-27 Net PC and Small Form Factor Models First Edition - June 1998...
Page 130 8042 detected error in keyboard transmission. Reset Resets program, runs keyboard BAT, defaults to Mode 2. Note: [1] Used in Mode 3 only. 5-28 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 131: Pointing Device Interface Operation
04h / 04h Configuration Data [1] -- / na NOTES: [1] Keyboard I/F only. [2] Keyboard I/F / Mouse I/F Compaq Deskpro EN Series of Personal Computers 5-29 Net PC and Small Form Factor Models First Edition - June 1998...
Page 132 A CPU write to I/O port 64h places a command value into the input buffer and sets the CMD/DATA bit of the status register (bit <3>) to CMD. 5-30 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models...
Page 133 Disable keyboard command (sets bit <4> of the 8042 command byte). Enable keyboard command (clears bit <4> of the 8042 command byte). Continued Compaq Deskpro EN Series of Personal Computers 5-31 Net PC and Small Form Factor Models First Edition - June 1998...
Page 134 Pulse output port. Controls the pulsing of bits <3..0> of the output port (0 = pulse, 1 = don’t pulse). Note that pulsing bit <0> will reset the system. 5-32 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models...
Page 135: Keyboard/Pointing Device Interface Connector
Keyboard/Pointing Device Connector Pinout Signal Description Signal Description DATA Data + 5 VDC Power Not Connected Clock Ground Not Connected Compaq Deskpro EN Series of Personal Computers 5-33 Net PC and Small Form Factor Models First Edition - June 1998...
Page 136: Universal Serial Bus Interface
2000h Base Class Code NOTES: Assume unmarked locations/gaps as reserved. Refer to applicable Intel documentation for detailed descriptions of registers. 5-34 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 137: Usb Control
Table 5–21. USB Connector Pinout Table 5-21. USB Connector Pinout Signal Description Signal Description +5 VDC USB+ Data (plus) USB- Data (minus) Ground Compaq Deskpro EN Series of Personal Computers 5-35 Net PC and Small Form Factor Models First Edition - June 1998...
Page 138: Audio Subsystem
Chapter 5 Input/Output Interfaces AUDIO SUBSYSTEM This system includes an audio subsystem featuring Compaq Premier Sound. Compatible with software written for industry-standard sound subsystems, the audio subsystem can capture and playback .WAV files and playback MIDI (.MID) files. A block diagram of the audio subsystem is shown in Figure 5-9. The architecture is based on the ES1869 audio controller, which provides the ADC, DAC, FM synthesis, spatializer 3D audio, and mixing functions.
Page 139: Figure 5-9. Audio Subsystem
CD Audio CD Audio Sum Off Line ISA Bus Beep 82371 Audio Beep Logic Figure 5–9. Audio Subsystem Block Diagram Compaq Deskpro EN Series of Personal Computers 5-37 Net PC and Small Form Factor Models First Edition - June 1998...
Page 140: Pcm Audio Processing
Compressed sound formats efficiently use space by concentrating sampling/quantizing in the middle of the sound spectrum and are suited for voice capture/playback. 5-38 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 141: Figure 5-12. Audio Subsystem
Right Hi Right Lo Left Hi Left Lo Time Figure 5–12. Audio Subsystem-to-ISA Bus PCM Audio Data Formats / Byte Ordering Compaq Deskpro EN Series of Personal Computers 5-39 Net PC and Small Form Factor Models First Edition - June 1998...
Page 142: Fm Synthesis Audio Processing
IOR- IOC- Address Address Data Data 7..0 Data Figure 5–14. Audio Controller-to-ISA Bus FM Audio Data Format 5-40 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 143: Programming
DMA channels. Typically, dual DMA operation would use DMA channel 1 for capture (recording) and DMA channel 0 or 3 for playback. Compaq Deskpro EN Series of Personal Computers 5-41 Net PC and Small Form Factor Models...
Page 144: Table 5-23. Audio Subsystem
Refer to OEM’s ES1869 data sheet for detailed register descriptions. [1] The filter functions used in Sound Blaster subsystems are not used in the audio subsystem. 5-42 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models...
Page 145: Table 5-25. Extended Modea
Same as bank 0 NOTE: Refer to OEM’s ES1869 data sheet for detailed registers descriptions. Abbreviations: AM Amplitude Modulation (tremolo) Vib Vibrato Compaq Deskpro EN Series of Personal Computers 5-43 Net PC and Small Form Factor Models First Edition - June 1998...
Page 146: Specifications
26 db Volume Range Input 0 - 22.5 db Output -46.5 - +10 db Frequency Response (speaker) 450 - 4000 Hz 5-44 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 147: Network Interface Controller
MB/s mode. Activity LED (green) – Indicates network activity. 100 TX LED (green) – Indicates connection with 100 MB/s network. Compaq Deskpro EN Series of Personal Computers 5-45 Net PC and Small Form Factor Models First Edition - June 1998...
Page 148: Power Management Support
When an enabled event is received the controller asserts the PME- signal that is used to initiate the wakeup sequence. 5-46 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 149: Configuration/Control
Operating Specifications Parameter Modes Supported Half or full duplex for 10BASE-T, 100BASE-TX Power Management Support APM, ACPI, PCI Power Management Spec. Compaq Deskpro EN Series of Personal Computers 5-47 Net PC and Small Form Factor Models First Edition - June 1998...
Page 150 Chapter 5 Input/Output Interfaces This page is intentionally blank. 5-48 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 151: Chapter 6 Graphics Subsystem
♦ Display modes (6.3) page 6-4 ♦ Programming (6.4) page 6-5 ♦ Monitor power management (6.5) page 6-6 ♦ Connectors (6.6) page 6-6 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 152: Functional Description
♦ QuickDraw 3D RAVE support for Win95 and WinNT ♦ OpenGL support for Win95 and WinNT ♦ Heidi support for WinNT ♦ ATI 3D CIF support for Win95 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 153: Ati Rage Pro Turbo Agp Graphics Controller
Processor Coprocessor Green Monitor VD7..0 VESA Blue Connector Figure 6-2. ATI 3D Rage Pro Turbo AGP 2X Graphics Controller Internal Architecture Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 154: Display Modes
0.59 MB 1.07 MB 1.66 MB 800 x 600 4 MB 0.92 MB 0.92 MB 0.92 MB 1.25 MB 2.17 MB Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 155: Programming
* Index at base minus 1 (i.e., if base is 3B5h, index is at 3B4h. 6.4.2.2 Extended VGA Modes Extended modes use the video BIOS (contained in the system flash ROM) and the supplied driver. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 156: Monitor Power Management Control
This connector conforms to Intel SODIMM specification version 0.92. NOTE: To avoid possible incompatibility problems, use memory expansion modules approved by Compaq for this specific system. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 157: Monitor Connector
G GND Blue Analog Ground DDC2-B Clock B GND Green Analog Ground NOTES: [1] Fuse automatically resets when excessive load is removed. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 158 Chapter 6 Graphics Subsystem This page is intentionally blank. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 159: Chapter 7 Power Supply And Distribution
+5 VDC 110/220 VAC -5 VDC Power Supply +12 VDC Drives Assembly -12 VDC Figure 7–1. Power Distribution and Control, Block Diagram Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 160: Power Supply Assembly
The power supply assembly includes a fan that can be shut down by the Fan Off signal, which is asserted from the system board logic during sleep (suspend) states. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models...
Page 161: Power Control
(PS On is asserted). The AC line cord should always be disconnected and both LEDs should not be illuminated before servicing the unit. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models...
Page 162: Wake Up Events
PS On. Note that the PCI card must have a second source of power to operate during the system’s sleep state. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models...
Page 163: Power Distribution
RTN = Return (signal ground) GND = Power ground RS = Remote sense FO = Fan off Figure 7–2. Power Cable Diagram Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 164: Low Voltage Distribution
1.85 VDC 01111 1.30 VDC 11001 2.6 VDC 00101 1.80 VDC 11111 CPU not installed 11010 2.5 VDC 00110 1.75 VDC Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 165: Signal Distribution
[2] No cable used for interface; direct connection between PS assembly and system board. CDS Models only. Figure 7–4. Signal Distribution Diagram Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 166: Figure 7-5. Header Pinouts
NOTE: No polarity consideration required for cable connection to header P6 (speaker) or P29 (SCSI HD LED). Figure 7–5. Header Pinouts Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 167: Chapter 8 Bios Rom
NOTE: This chapter describes BIOS in general and focuses on aspects of BIOS unique to this particular system. For detailed information regarding the BIOS, refer to the Compaq Basic Input/Output System Technical Reference Guide. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 168: Boot/Reset Functions
82371 to create a hard reset by asserting CPURST#, PCIRST#, and RSTDRV for at least 1 ms. After the reset the 82371 automatically clears bit <2> of 0CF9h. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models...
Page 169: Memory Detection And Configuration
5. Memory Timing – For SDRAM, the memory controller requires the RAS pre-charge time and the RAS-to-CAS delay time. SPD bytes checked: 27and 29. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 170: Desktop Management Support
Entry point for the BIOS32 Service Directory Revision level Length of data structure (no. of 16-byte units) Checksum (should add up to 00h) Reserved (all 0s) Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 171 = Entry point for the service relative to the BASE returned in EBX The following subsections describe aspects of Desktop Management unique to this system. For a general description of these BIOS functions refer to the Compaq BIOS Technical Reference Guide.
Page 172: System Id
ES:BX to indicate the location of the SIT. This section lists the default values that should be read from the SIT. For specific bit descriptions and more detailed information on the SIT refer to the Compaq Basic Input/Output System (BIOS) Technical Reference Guide. Power Conservation Record, SIT Record 01h...
Page 173 Virus Detect, Serial/Parallel Cntrl., FD Drive Cntl., Stby Cntrl. Diskette Drive Fnct., Password Functions Password Locking, Ownership Tag Length NOTE: [1] Determined by system at runtime. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 174 Maximum Memory Installable 0001h 0Ch, 0Dh Reserved 0000h Processor Designer System Cache Error Correction NOTE: [1] Determined by system at runtime. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 175 Diskette Type Installed On-Board NIC Speed On-Board NIC Attributes General Purpose Software Support System EDMA Support NOTE: [1] Determined at run time. Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition - June 1998...
Page 176 Automatic Server Recovery Record, SIT Record 0Bh (Not Used) Memory Banks Information Record, SIT Record 0Ch (Not Used) Multiprocessor Feature Information Record, SIT Record 0Dh (Not Used) 8-10 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 177 Hood Removal NOBOOT CMOS Byte Offset Hood Removal NOBOOT CMOS Bit Location Software Hood Lock NOTE: [1] Determined at runtime. Compaq Deskpro EN Series of Personal Computers 8-11 Net PC and Small Form Factor Models First Edition - June 1998...
Page 178 Slot ID Type of Slot Data Width of Slot Slot Usage/Length/Virtual Slot Category Slot ID NOTE: [1] Determined at runtime. 8-12 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 179: Edid Retrieve
8.4.4 DRIVE FAULT PREDICTION The Compaq BIOS provides direct Drive Fault Prediction support for IDE-type hard drives. This feature is provided through two BIOS calls. Function INT 15, AX=E817h is used to retrieve a 512-byte block of drive attribute data while the INT 15, AX=E81Bh is used to retrieve the drive’s warranty threshold data.
Page 180: System Map Retrieval
(indicates 0-639k is available to the OS) Consecutive calls would continue until EBX returns with 0, indicating that the memory map is complete. 8-14 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 181: Flash Rom Functions
Disable (BL=08h) function. Entry: = E822h = 09h = 00 (Failure) = 86, call not supported Compaq Deskpro EN Series of Personal Computers 8-15 Net PC and Small Form Factor Models First Edition - June 1998...
Page 182: Accessing Cmos
= Pointer to buffer passing multiple byte features OUTPUT: (Successful) = Reserved = Value read (on a read) (Failure) = 86h, Function not supported 8-16 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 183 S/W BOM Serial Number of Bytes 0040h Select ECP Mode NOTE: For full bit definitions refer to the Compaq BIOS Technical Reference Guide . [1] Determined at runtime. Compaq Deskpro EN Series of Personal Computers 8-17 Net PC and Small Form Factor Models...
Page 184: Security Functions
0101 = Bit 5 0010 = Bit 2 0110 = Bit 6 0011 = Bit 3 0111 = Bit 7 8-18 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 185: Pnp Support
(and require intervention) by the user. Table 8-2 shows the PnP functions supported (for detailed PnP information refer to the Compaq BIOS Technical Reference Guide): Table 8–1. PnP BIOS Functions Table 8-2.
Page 186: Smbios
System Configuration Options BIOS Language Information Physical Memory Array Memory Devices Memory Error Information Memory Array Mapped Addresses Memory Device Mapped Addresses 8-20 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 187: Power Management Functions
♦ Sleep/Wake logic (S1, S4 (NT), S5 ♦ Legacy/ACPI select ♦ C1 state (Halt) ♦ C2 state (STOPGRANT) ♦ C3 state (no clock) ♦ PCI PME Compaq Deskpro EN Series of Personal Computers 8-21 Net PC and Small Form Factor Models First Edition - June 1998...
Page 188: Apm Support
15 minutes before Standby entered: Keyboard Mouse Serial port d. Diskette drive Hard drive 8-22 Compaq Deskpro EN Series of Personal Computers Net PC and Small Form Factor Models First Edition – June 1998...
Page 189 Get Power State 530Dh Enable/Disable Device Power Management 530Eh APM Driver Version 530Fh Engage/Disengage Power Management 5380h OEM (Compaq) Specific APM Function Compaq Deskpro EN Series of Personal Computers 8-23 Net PC and Small Form Factor Models First Edition - June 1998...
Page 190: Usb Legacy Support
1. Create a system (bootable) diskette using the FORMAT A: /S command in DOS. 2. Download the appropriate BIOS firmware from the Compaq web site. 3. Copy the downloaded BIOS file and the flash utility file onto the boot diskette.
Page 191: Appendix Aerror Messages And Codes
1 short, 2 long NUM Lock Base memory failure. 1 long, 2 short CAP Lock Video/graphics controller failure. 2 long, 1 short Scroll Lock System failure (prior to video initialization). NOTE: [1] PS/2 keyboard only. Compaq Personal Computers Changed – April 1998...
Page 192: Power-On Self Test (Post) Messages
A non-PnP ISA card has requested a resource already in use. Conflict System Memory Size Mismatch Amount of memory detected on system board is different from amount indicated in CMOS. NOTE: PCI and PnP messages are displayed with bus, device, and function information. Compaq Personal Computers Changed - April 1998...
Page 193: Processor Error Messages
Port 61 bit <0> not at zero 116-xx Way 0 read/write test failed 105-06 Port 61 bit <5> not at one 199-00 Installed devices test failed 105-07 Port 61 bit <3> not at one Compaq Personal Computers Changed – April 1998...
Page 194: Memory Error Messages
No Make code observed 303-02 LED test, reset test failed 304-05 Cannot /disable repeat key feature 303-03 LED test, reset failed 304-06 Unable to return to Normal mode 303-04 LED test, LED command test failed Compaq Personal Computers Changed - April 1998...
Page 195: Printer Error Messages
80x25 mode, 9x14 cell test failed 512-01 Gray scale test failed 506-01 80x25 mode, 8x8 cell test failed 514-01 White screen test failed 507-01 40x25 mode test failed 516-01 Noise pattern test failed Compaq Personal Computers Changed – April 1998...
Page 196: Diskette Drive Error Messages
1101-09 Port test, interrupt circuit failure 1109-06 Data line fault 1101-10 Port test, COM1 set to invalid INT 1150-xx Comm port setup error (run Setup) 1101-11 Port test, COM2 set to invalid INT Compaq Personal Computers Changed - April 1998...
Page 197: Modem Communications Error Messages
Modem time-out waiting for remote connection NOTES: [1] Local loopback mode [2] Analog loopback originate mode [3] Analog loopback answer mode [4] Modem auto originate test [5] Modem auto answer test [6] Modem direct connect test Compaq Personal Computers Changed – April 1998...
Page 198: Hard Drive Error Messages
1707-xx = Hard drive recalibrate test 1724-xx = Net work preparation test 1708-xx = Hard drive format bad track test 1736-xx = Drive monitoring test 1709-xx = Hard drive reset controller test 1799-xx = Invalid hard drive type Compaq Personal Computers Changed - April 1998...
Page 199: Hard Drive Error Messages
Lightpen graphics test failed, no resp. 2477-xx AVGA data path test failed 2417-04 Lightpen graphics test failed, invalid resp. 2478-xx AVGA BitBLT test failed 2418-01 EGA memory test failed 2480-xx AVGA linedraw test failed Compaq Personal Computers Changed – April 1998...
Page 200: Audio Error Messages (3206- Xx
Ethernet reset test failed 6068-xx Token ring int. loopback test failed 6028-xx Ethernet int. loopback test failed 6069-xx Token ring ext. loopback test failed 6029-xx Ethernet ext. loopback test failed 6089-xx Token ring open A-10 Compaq Personal Computers Changed - April 1998...
Page 201: Scsi Interface Error Messages
Left mouse button is stuck closed 8601-08 Timeout occurred 8601-04 Right mouse button is inoperative 8601-09 Mouse loopback test failed 8601-05 Right mouse button is stuck closed 8601-10 Pointing device is inoperative Compaq Personal Computers A-11 Changed – April 1998...
Page 202: Cemm Priviledged Ops Error Messages
General protection fault INT 3 Page fault Array bounds check Coprocessor Invalid opcode Attempt to write to protected area Coprocessor device not available Reserved Double fault Invalid software interrupt Coprocessor segment overrun A-12 Compaq Personal Computers Changed - April 1998...
Page 203: Figure B-1. Ascii Character
Figure B–1. ASCII Character Set Table B-1. ASCII Character Set Symbol Symbol Symbol Symbol Blank Space ‘ “ ♥ ♦ ♣ ♠ & ‘ ¶ § ↑ ↓ → ← < ↔ > Continued Compaq Personal Computers Original - July 1996...
Page 204: Appendix B Ascii Character Set
94, 95 Shift and key w/corresponding symbol Key w/corresponding symbol 97-126 Key w/corresponding symbol or Shift and key w/corresponding symbol and Caps Lock active Ctrl - 128-255 Alt and decimal digit(s) of desired character Compaq Personal Computers Original - July 1996...
Page 205: Introduction
C. Appendix C KEYBOARD 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 an “enhanced keyboard” and includes a separate cursor control key cluster, twelve “function” keys, and enhanced programmability for additional functions.
Page 206: Keystroke Processing
(and the respective key strokes) are lost. Multi-byte sequences must fit entirely into the buffer before the respective keystroke can be registered. Compaq Personal Computers Changed - April 1998...
Page 207: Transmissions To The System
8042-type logic of the system unit responds to scan code reception by asserting IRQ1, which is processed by the interrupt logic and serviced by the CPU with an interrupt service routine. The service routine takes the appropriate action based on which key was pressed. Compaq Personal Computers Change –- April 1998...
Page 208: Keyboard Layouts
Appendix C Keyboard 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 Compaq Personal Computers Changed - April 1998...
Page 209: Figure C-5. U.s. Englishw
Technical Reference Guide C.2.2.2 Windows Enhanced Keyboards 111 112 Figure C–5. U.S. English Windows (101W-Key) Keyboard Key Positions 111 112 Figure C–6. National Windows (102W-Key) Keyboard Key Positions Compaq Personal Computers Change –- April 1998...
Page 210: Keys
The key that is pressed to resume operation is discarded. This function may be ignored by the application. The Esc, Fn (function), Insert, Home, Page Up/Down, Delete, and End keys operate at the discretion of the application software. Compaq Personal Computers Changed - April 1998...
Page 211 The Ctrl, Alt, and Delete keystroke combination (required twice if in the Windows environment) initiates a system reset (warm boot) that is handled by the BIOS. Compaq Personal Computers Change –- April 1998...
Page 212 The combination keystroke of the Window Logo + 1-0 keys are reserved for OEM use for auxiliary functions (speaker volume, monitor brightness, password, etc.). Key position 112 (marked with an application window icon ) is used in combination with other keys for invoking Windows application functions. Compaq Personal Computers Changed - April 1998...
Page 213: Keyboard Commands
F0h (i.e., Break code for 0Eh is “F0h 0Eh”). ♦ Mode 3: Mode 3 generates a different scan code set from Modes 1 and 2. Code translation must be disabled since translation for this mode cannot be done. Compaq Personal Computers Change –- April 1998...
Page 214 E0 F0 12 E0 4A/E0 F0 4A E0 12 [1] 37/B7 7C/F0 7C 7E/na 4A/CA 7B/F0 7B 84/na 0F/8F 0D/F0 0D 0D/na 10/90 15/F0 15 15/na Continued ([x] Notes listed at end of table.) C-10 Compaq Personal Computers Changed - April 1998...
Page 215 1A/F0 1A 1A/F0 1A 2D/AD 22/F0 22 22/F0 22 2E/AE 21/F0 21 21/F0 21 2F/AF 2A/F0 2A 2A/F0 2A 30/B0 32/F0 32 32/F0 32 Continued ([x] Notes listed at end of table.) Compaq Personal Computers C-11 Change –- April 1998...
Page 216 [4] Left Shift key active. For active right Shift key, substitute AA/2A make/break codes for B6/36 codes. [5] Left Shift key active. For active right Shift key, substitute F0 12/12 make/break codes for F0 59/59 codes. [6] Num Lock key active. [7] Windows keyboards only C-12 Compaq Personal Computers Changed - April 1998...
Page 217 INDEX 3D effects, 6-2 PCI bus, 4-3 87307 I/O controller, 4-49 RJ-45, 5-47 abbreviations, 1-3 serial interface (RS-232), 5-14 Accelerated Graphics Port (AGP), 4-11 Universal Serial Bus interface, 5-35 ACPI, 5-46 cover lock, 4-55 acronyms, 1-3 Deadly condition, 3-4 administrator password, 4-52, 4-53 Deschutes, 3-4 AGP, 4-11 Desktop management, 4-51...
Page 218 maskable (IRQn), 4-22 remote wake up, 5-46 nonmaskable (NMI, SMI), 4-24 reset, 8-2 interrupts, PCI, ROM BIOS, 8-1 interval timer, 4-26 RTC, 4-28 ISA bus, 2-8 scan codes (keyboard), C-9 ISA bus, overview, 4-15 SEC cartridge, 3-2 key (keyboard) functions, C-6 security functions (BIOS), 8-18 keyboard, C-1 security, I/O, 4-53...

This manual is also suitable for:

Deskpro en series

Compaq EN Series Technical Reference Manual

Chapter 1 Introduction

Chapter 2 System Overview

Chapter 3 Processor/Memory Subsystem

Chapter 4 System Support

Chapter 5 Input/Output Interfaces

Chapter 6 Graphics Subsystem

Chapter 7 Power Supply and Distribution

Chapter 8 Bios Rom

Appendix Aerror MESSAGES and CODES

Appendix B Ascii Character Set

Appendix C Keyboard

Quick Links

Related Manuals for Compaq EN Series

Summary of Contents for Compaq EN Series