Compaq Deskpro 4000 Technical Reference Manual page 7

5.5 PARALLEL INTERFACE ................................................................................................... 5-21
5.5.1 STANDARD PARALLEL PORT MODE ..................................................................... 5-21
5.5.2 ENHANCED PARALLEL PORT MODE ..................................................................... 5-22
5.5.3 EXTENDED CAPABILITIES PORT MODE ............................................................... 5-22
5.5.4 PARALLEL INTERFACE PROGRAMMING .............................................................. 5-23
5.5.5 PARALLEL INTERFACE CONNECTOR ................................................................... 5-27
5.6 KEYBOARD/POINTING DEVICE INTERFACE ............................................................... 5-28
5.6.1 KEYBOARD INTERFACE OPERATION ................................................................... 5-28
5.6.2 POINTING DEVICE INTERFACE OPERATION ....................................................... 5-30
5.6.3 KEYBOARD/POINTING DEVICE INTERFACE PROGRAMMING ......................... 5-30
5.6.4 KEYBOARD/POINTING DEVICE INTERFACE CONNECTOR................................ 5-34
5.7 ETHERNET INTERFACE................................................................................................... 5-35
5.7.1 NIC CONFIGURATION/CONTROL ........................................................................... 5-36
5.7.2 NIC CONNECTORS.................................................................................................... 5-36
5.8 UNIVERSAL SERIAL BUS INTERFACE........................................................................... 5-37
5.8.1 USB CONFIGURATION.............................................................................................. 5-37
5.8.2 USB CONTROL........................................................................................................... 5-38
5.8.3 USB CONNECTOR ..................................................................................................... 5-38
5.9 ULTRA SCSI ADAPTER .................................................................................................... 5-39
5.9.1 SCSI CONNECTORS ................................................................................................. 5-40
CHAPTER 6 AUDIO SUBSYSTEM ......................................................................................................
6.1 INTRODUCTION.................................................................................................................. 6-1
6.2 FUNCTIONAL DESCRIPTION............................................................................................. 6-2
6.2.1 PCM AUDIO PROCESSING.......................................................................................... 6-4
6.2.2 FM SYNTHESIS AUDIO PROCESSING....................................................................... 6-7
6.3 AUDIO SUBSYSTEM PROGRAMMING ............................................................................. 6-8
6.3.1 CONFIGURATION........................................................................................................ 6-8
6.3.2 CONTROL..................................................................................................................... 6-9
6.4 SPECIFICATIONS .............................................................................................................. 6-11
CHAPTER 7 POWER SUPPLY AND DISTRIBUTION.......................................................................
7.1 INTRODUCTION.................................................................................................................. 7-1
7.2 POWER SUPPLY ASSEMBLY/CONTROL .......................................................................... 7-1
7.2.1 POWER SUPPLY ASSEMBLY ..................................................................................... 7-2
7.2.2 POWER CONTROL....................................................................................................... 7-3
7.3 POWER DISTRIBUTION...................................................................................................... 7-4
7.3.1 3.5/5/12 VDC DISTRIBUTION...................................................................................... 7-4
7.3.2 LOW VOLTAGE DISTRIBUTION................................................................................ 7-5
7.4 SIGNAL DISTRIBUTION ..................................................................................................... 7-6
Compaq Deskpro 4000 and 6000 Personal Computers
featuring the Pentium II Processor
First Edition - October1997
Technical Reference Guide
v