Computer Systems Division Computer Hardware Service and Reference Manual

viii Contents
List of Tables
System Memory Map............................................................................................................ 1-7
Interrupt Level Assignments ................................................................................................. 1-8
DMA Assignments................................................................................................................ 1-8
Setup Key Functions.............................................................................................................2-5
Sample Memory Configurations............................................................................................ 3-9
NEC CSD Service and Information Telephone Numbers....................................................... 4-2
Problems and Solutions......................................................................................................... 4-5
Beep Code Descriptions........................................................................................................ 4-9
Disassembly Sequence.......................................................................................................... 5-2
Direction SP B-Series Desktop Field-Replaceable Parts List ................................................5-12
Direction SP B-Series Minitower Field-Replaceable Parts List.............................................5-15
System Board Connectors .....................................................................................................B-2
System Board Internal Connectors ........................................................................................B-4
System Board Connector Numbers and Types.......................................................................B-4
RS-232C Serial Port Connector Pin Assignments ..................................................................B-5
Parallel Port Connector Pin Assignments...............................................................................B-5
Primary Power Supply Connector Pin Assignments...............................................................B-6
Keyboard and Mouse Connector Pin Assignments.................................................................B-7
Front Panel Connector Pin Assignments................................................................................B-7
Diskette Drive Connector Pin Assignments...........................................................................B-8
IDE/PCI Connector Pin Assignments....................................................................................B-9
DIMM Socket Pin Assignments ..........................................................................................B-10
AGP Connector Pin Assignments........................................................................................B-11
ISA Expansion Slot Pin Assignments..................................................................................B-13
PCI Expansion Slot Pin Assignments ..................................................................................B-15
USB Connectors .................................................................................................................B-16
System Board Jumper Settings ..............................................................................................C-3