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Compaq Presario 18XL Maintenance & Service Guide Presario 1800/1800T Serie - Page 18

System Interrupts, System DMA

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Presario 1800/1800T Series Models: XL280, XL380, XL381, and XL390 System Interrupts Hardware IRQ System Function IRQ 0 System timer IRQ 1 Standard 101/102-key or Microsoft Natural Keyboard IRQ 2 Programmable Interrupt Controller IRQ 3 Lucent 56K V.90 PCI DF Modem IRQ 3 IRQ 4 ACPI IRQ Holder for PCI IRQ Steering Communications Port (COM1) IRQ 5 IRQ 5 IRQ 5 ESS SOLO-1 PCI AudioDrive ACPI IRQ Holder for PCI IRQ Steering RAGE Mobility AGP (English) IRQ 6 Standard Floppy Disk Controller IRQ 7 Printer Port (LPT1) IRQ 8 System CMOS/Real Time Clock IRQ 9 SCI IRQ used by ACPI Bus Hardware IRQ System Function IRQ 10 IRQ 11 Available Intel® Pro/100S Mobile LAN on Motherboard IRQ 11 Texas Instruments PCI-1410 CardBus Controller IRQ 11 IRQ 11 ACPI IRQ Holder for PCI IRQ Steering Intel® 82371AB/EB PCI to USB Universal Host Controller IRQ 11 ACPI IRQ Holder for PCI IRQ Steering IRQ 12 Synaptics PS/2 TouchPad IRQ 13 Numeric Data Processor IRQ 14 IRQ 14 IRQ 15 IRQ 15 Intel® 82371AB/EB PCI Bus Master IDE Controller Primary IDE Controller (Dual FIFO) Intel® 82371AB/EB PCI Bus Master IDE Controller Secondary IDE Controller (Dual FIFO) System DMA Hardware DMA DMA 1 DMA 2 DMA 4 System Function ESS SOLO-1 DOS Emulation Standard Floppy Disk Controller Direct Memory Access Controller 2 SPECIFICATIONS PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1800 SERIES

Section	Page
Welcome to the Maintenance & Service Guide (MSG)	1
Using this Guide	2
Viewing a Chapter	2
Expanding & Hiding Topics	2
Opening another Chapter	2
Printing the MSG	2
Before You Begin	3
Back to MSG Contents	3
Notice	3
Preface	4
Symbols	4
Technician Notes	4
Locating the Serial Number	5
Locating Additional Information	5
Product Description	6
Back to MSG Contents	6
Models and Features	7
Front of Unit	8
Internet Zone Buttons and Lights	9
Model XL280	9
Model XL3xx	10
Front Bezel Components	11
Left-Side Components	12
RightSide Components	13
Underneath the Unit	14
Rear Connectors	15
Optional QuikDock	16
Components	16
Connectors	16
Specsifications	17
Back to MSG Contents	17
Physical and Environmental	17
System Interrupts	18
System DMA	18
System I/O Addresses	19
System Memory Catalog	21
Memory Expansion	21
Display	22
Diskette Drive	22
Hard Drive	23
Battery Pack	24
CD/CD-RW/DVD Drive	24
Pin Assignments	25
Back to MSG Contents	25
Parallel Connector	25
TV-Out (Composite Video) Connector	26
Universal Serial Bus (USB) Connector	26
Keyboard/Mouse Connector	26
Modem Connector	27
External VGA Monitor Connector	27
Game Port Connector	28
Serial Connector	28
QuikDock Connector	29
Battery & Power Management	30
Back to MSG Contents	30
Power Modes	30
Hibernation	30
Standby	30
Full Off	31
Summary of Power Modes	31
Power Settings	32
Power Schemes	32
Alarms	33
SpeedStep Technology	33
Rebooting After a Lockup	34
Recovering From a Loss of Electrical Power	34
Increasing Battery Pack Operating Time	35
Minimizing the Energy Required	35
Maximizing the Energy Stored	35
Conditioning a Battery Pack	36
Disposing of a Used Battery Pack	36
Troubleshooting	37
Back to MSG Contents	37
Preliminary Steps	38
Clearing the Power-On Password	39
Power-On Self-Test (POST)	40
POST Error Messages	40
Compaq Diagnostics	42
Checkup (TEST)	43
View System Information (INSPECT)	44
Diagnostic Error Codes	45
Troubleshooting without Diagnostics	54
Before Replacing Parts	54
Solving Minor Problems	55
Audio Solutions	55
Battery Pack/Gauge Solutions	55
CD and DVD Drive Solutions	58
Diskette Drive Solutions	58
Display Solutions	59
Hard Drive Solutions	62
Hardware Installation Solutions	62
Keyboard/Numeric Keypad Solutions	63
Memory Solutions	63
PC Card Solutions	64
Power Solutions	66
Printer Solutions	67
TouchPad/Pointing Device Solutions	68
Contacting Compaq Support	69
Shipping Preparation	69
Removal & Replacement	70
Back to MSG Contents	70
Electrostatic Discharge	70
Required Tools	71
Screws	71
Connectors & Plastic Parts	71
ZIFConnector	72
Cables	73
Hard Drive Ribbon Cable	74
CD/DVDRibbonCable	75
DisketteDriveRibbonCable	76
SpeakerAssemblyCable	77
Keyboard Ribbon Cable	78
Preparing the Notebook for Disassembly	79
Removal Procedures	80
QuikDock	80
Battery Pack	81
Palmrest Cover with TouchPad	82
Keyboard	85
Button Board Cover	86
Internet Switch Board	90
Heat Sink (Heatspreader)	92
Modem	93
Hard Drive	94
LCD DisqPlay Module	97
Processor	98
CD, CD-RW, or DVD Drive	100
Display Panel Assembly	103
Upper CPU Cover	106
Fan Assembly	107
Real Time Clock (RTC) Battery	109
Diskette Drive	111
Voltage Converter Board	113
Speaker Assembly	114
System Board	116
Memory Module	121
Parts Catalog	123
Back to MSG Contents	123
Illustrated Parts	123
System Unit	123
Boards	124
Display Assembly	125
Mass-Storage Devices	126
Miscellaneous Cable Kit	127
Miscellaneous Hardware Kit	127
Miscellaneous Plastics Kit	128
Miscellaneous Parts	129
Documentation & Software	129
PartNumbers&Availability	130
Build-to-Order Models	130
Alphabetical Spares Listing	131

Match case Limit results 1 per page

2 S

PECIFICATIONS

RESARIO

OTEBOOK

AINTENANCE

AND

ERVICE

UIDE

1800 S

ERIES

Presario 1800/1800T Series

Models: XL280, XL380, XL381,

and XL390

System Interrupts

System DMA

Hardware

IRQ

System Function

Hardware

IRQ

System Function

IRQ 0

System timer

IRQ 10

Available

IRQ 1

Standard 101/102-key or

Microsoft Natural Keyboard

IRQ 11

Intel

ﬁ

Pro/100S Mobile LAN

on Motherboard

IRQ 2

Programmable Interrupt

Controller

IRQ 11

Texas Instruments PCI-1410

CardBus Controller

IRQ 3

Lucent 56K V.90 PCI DF Modem

IRQ 11

ACPI IRQ Holder for PCI IRQ

Steering

IRQ 3

ACPI IRQ Holder for PCI IRQ

Steering

IRQ 11

Intel

ﬁ

82371AB/EB PCI to

USB Universal Host Controller

IRQ 4

Communications Port (COM1)

IRQ 11

ACPI IRQ Holder for PCI IRQ

Steering

IRQ 5

ESS SOLO-1 PCI AudioDrive

IRQ 12

Synaptics PS/2 TouchPad

IRQ 5

ACPI IRQ Holder for PCI IRQ

Steering

IRQ 13

Numeric Data Processor

IRQ 5

RAGE Mobility AGP (English)

IRQ 14

Intel

ﬁ

82371AB/EB PCI Bus

Master IDE Controller

IRQ 6

Standard Floppy Disk Controller

IRQ 14

Primary IDE Controller (Dual

FIFO)

IRQ 7

Printer Port (LPT1)

IRQ 15

Intel

ﬁ

82371AB/EB PCI Bus

Master IDE Controller

IRQ 8

System CMOS/Real Time Clock

IRQ 15

Secondary IDE Controller

(Dual FIFO)

IRQ 9

SCI IRQ used by ACPI Bus

Hardware

DMA

System Function

DMA 1

ESS SOLO-1 DOS Emulation

DMA 2

Standard Floppy Disk Controller

DMA 4

Direct Memory Access Controller