HP Pavilion Hdx9100 Entertainment Notebook Pc Series Service Guide

System DMA specifications
Hardware DMASystem function
DMA0Not applicable
DMA1*Not applicable
DMA2*Not applicable
DMA3Not applicable
DMA4Direct memory access controller
DMA5*Available for PC Card
DMA6Not assigned
DMA7Not assigned
*PC Card controller can use DMA 1, 2, or 5.
System DMA specifications 103 

System interrupt specifications
Hardware IRQSystem function
IRQ0System timer
IRQ1Standard 101-/102-Key or Microsoft® Natural Keyboard
IRQ2Cascaded
IRQ3Intel 82801DB/DBM USB2 Enhanced Host Controller—24CD
IRQ4COM1
IRQ5*Conexant AC—Link Audio Intel 82801DB/DBM SMBus Controller—
24C3 Data Fax Modem with SmartCP
IRQ6Diskette drive
IRQ7*Parallel port
IRQ8System CMOS/real-time clock
IRQ9*Microsoft ACPI-compliant system
IRQ10*Intel USB UHCI controller—24C2
Intel 82852/82855 GM/GME Graphic Controller
Realtek...

System I/O address specifications
I/O address (hex)System function (shipping configuration)
000 - 00FDMA controller no. 1
010 - 01FUnused
020 - 021Interrupt controller no. 1
022 - 024Opti chipset configuration registers
025 - 03FUnused
02E - 02F87334 “Super I/O” configuration for CPU
040 - 05FCounter/timer registers
044 - 05FUnused
060Keyboard controller
061Port B
062 - 063Unused
064Keyboard controller
065 - 06FUnused
070 - 071NMI enable/RTC
072 - 07FUnused
080 - 08FDMA page registers
090 - 091Unused...

I/O address (hex)System function (shipping configuration)
220 - 22FEntertainment audio
230 - 26DUnused
26E - 26Unused
278 - 27FUnused
280 - 2ABUnused
2A0 - 2A7Unused
2A8 - 2E7Unused
2E8 - 2EFReserved serial port
2F0 - 2F7Unused
2F8 - 2FFInfrared port
300 - 31FUnused
320 - 36FUnused
370 - 377Secondary diskette drive controller
378 - 37FParallel port (LPT1/default)
380 - 387Unused
388 - 38BFM synthesizer—OPL3
38C - 3AFUnused
3B0 - 3BBVGA
3BC - 3BFReserved (parallel port/no EPP support)
3C0 - 3DFVGA
3E0 -...

System memory map specifications
SizeMemory addressSystem function
640 KB00000000-0009FFFFBase memory
128 KB000A0000-000BFFFFVideo memory
48 KB000C0000-000CBFFFVideo BIOS
160 KB000C8000-000E7FFFUnused
64 KB000E8000-000FFFFFSystem BIOS
15 MB00100000-00FFFFFFExtended memory
58 MB04800000-07FFFFFFSuper extended memory
58 MB04800000-07FFFFFFUnused
2 MB08000000-080FFFFFVideo memory (direct access)
4 GB08200000-FFFEFFFFUnused
64 KB FFFF0000-FFFFFFFF System BIOS
System memory map specifications 107 

7
Screw listing
This section provides specification and reference information for the screws and screw locks used in the
computer. All screws and screw locks listed in this section are available in the Screw Kit, spare part number
448172-001, and the Display Screw Kit, spare part number 452309-001.
Phillips PM2.5×5.0 screw
ColorQuantityLengthThreadHead diameter
Black 49 5.0 mm 2.5 mm 5.0 mm
Where used: 2 screws that secure the display bezel to the display assembly
108 Chapter 7   Screw listing 

Where used: 10 screws that secure the display bezel to the display assembly
Where used:
(1) Two screws that secure the camera module to the display enclosure
(2) Eight screws that secure the display panel to the display enclosure
Phillips PM2.5×5.0 screw 109 

Where used: 4 screws that secure the speakers to the display enclosure
Where used:
(1) Two screws that secure the WLAN module to the system board
(2) One screw that secures the rear cover to the computer
(3) Two screws that secure the top cover to the computer
110 Chapter 7   Screw listing 

Where used: 2 screws that secure the TV tuner module to the system board
Where used:
(1) Four screws that secure the keyboard to the computer
(2) Four screws that secure the top cover to the computer
Phillips PM2.5×5.0 screw 111 

Where used: 2 screws that secure the top cover to the computer
Where used:
(1) Two screws that secure the audio/infrared board to the base enclosure
(2) One screw that secures the rear USB board to the base enclosure
(3) Two screws that secure the front USB board to the base enclosure
(4) One screw that secures the video connector board to the base enclosure
112 Chapter 7   Screw listing