Compaq W4000 manual System Support

Technical Reference Guide
CHAPTER 4 SYSTEM SUPPORT
4.1		INTRODUCTION	4-1
4.2		PCI BUS OVERVIEW	4-2
4.2.1		PCI BUS TRANSACTIONS	4-3
4.2.2 PCI BUS MASTER ARBITRATION			4-6
4.2.3		OPTION ROM MAPPING	4-7
4.2.4		PCI INTERRUPTS	4-7
4.2.5 PCI POWER MANAGEMENT SUPPORT			4-7
4.2.6		PCI SUB-BUSSES	4-7
4.2.7		PCI CONFIGURATION	4-8
4.2.8		PCI CONNECTOR	4-9
4.3		AGP BUS OVERVIEW	4-10
4.3.1		BUS TRANSACTIONS	4-10
4.3.2		AGP CONFIGURATION	4-13
4.3.3		AGP CONNECTOR	4-14
4.4		SYSTEM RESOURCES	4-15
4.4.1		INTERRUPTS	4-15
4.4.2		DIRECT MEMORY ACCESS	4-19
4.5		SYSTEM CLOCK DISTRIBUTION	4-22
4.6	REAL-TIME CLOCK AND CONFIGURATION MEMORY		4-23
4.6.1		CLEARING CMOS	4-23
4.6.2 CMOS ARCHIVE AND RESTORE			4-24
4.6.3		STANDARD CMOS LOCATIONS	4-24
4.7		SYSTEM MANAGEMENT	4-25
4.7.1		SECURITY FUNCTIONS	4-25
4.7.2		POWER MANAGEMENT	4-27
4.7.3		SYSTEM STATUS	4-27
4.7.4 THERMAL SENSING AND COOLING			4-28
4.8	REGISTER MAP AND MISCELLANEOUS FUNCTIONS		4-30
4.8.1		SYSTEM I/O MAP	4-30
4.8.2 LPC47B367 I/O CONTROLLER FUNCTIONS			4-31
CHAPTER 5 INPUT/OUTPUT INTERFACES
5.1		INTRODUCTION	5-1
5.2		ENHANCED IDE INTERFACE	5-1
5.2.1		IDE PROGRAMMING	5-1
5.2.2		IDE CONNECTOR	5-3
5.3		DISKETTE DRIVE INTERFACE	5-4
5.3.1		DISKETTE DRIVE PROGRAMMING	5-5
5.3.2		DISKETTE DRIVE CONNECTOR	5-7
5.4		SERIAL INTERFACE	5-8
5.4.1		RS-232 INTERFACE	5-8
5.4.2		COM1 PORT HEADER	5-9
5.4.3		SERIAL INTERFACE PROGRAMMING	5-9
5.5		PARALLEL INTERFACE	5-11
5.5.1 STANDARD PARALLEL PORT MODE			5-11
5.5.2 ENHANCED PARALLEL PORT MODE			5-12
5.5.3 EXTENDED CAPABILITIES PORT MODE			5-12
5.5.4		PARALLEL INTERFACE PROGRAMMING	5-13
5.5.5		PARALLEL INTERFACE CONNECTOR	5-15

ivCompaq Evo and Workstation Personal Computers Featuring the Intel Pentium 4 Processor

Second Edition –- January 2003