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1-14 Product Information HP OmniBook 900
Table 1-13. Functional Structure
Bootup
CPU module
Motherboard
BIOS IC
Floppy disk module
Hard disk drive
Main processor.
Primary system circuitry.
Code for basic system functions.
First source of disk-based startup code.
Second source of disk-based startup code.
Processor
CPU module
Motherboard
Main processor, numeric data processor, L1 and L2 cache.
Primary system circuitry.
Memory
Motherboard
RAM board
First 32 MB of RAM, video RAM.
Changeable RAM.
Power
Battery
Motherboard
AC adapter
Power storage.
AC adapter socket, power switch, lid switch, system-off switch, power
supply, power control circuitry.
AC-to-DC converter.
Display
Motherboard
LCD module
Display/graphics controller, PCMCIA/zoomed video controller, video
RAM, power converter for backlight.
Display output, backlight.
Hard disk
Motherboard
Hard disk drive
Hard disk controller.
Hard disk mechanism.
Floppy drive
Motherboard
Floppy disk module
Floppy disk controller.
Floppy disk mechanism.
Keyboard
Motherboard
BIOS IC
Keyboard
Keyboard controller.
Keyboard BIOS.
Key switches.
Pointer
Motherboard
BIOS IC
Keyboard
Top case
Keyboard controller, pointing stick controller (PS/2 output).
Keyboard BIOS.
Pointing stick sensor.
Touch pad sensor, controller (PS/2 output).
Audio
Motherboard
Speaker
Audio controller, audio decoder, speaker amplifier, headphone amplifier,
zoomed video controller, external audio jacks, microphone.
Speaker (mixed left and right channels).
Status
Motherboard Keyboard controller, main LEDs, keyboard LEDs.
Serial
Motherboard I/O controller, serial connector.
Parallel
Motherboard I/O controller, parallel connector.
Infrared
Motherboard I/O controller, infrared transmitter/receiver.
PS/2 port
Motherboard Keyboard controller, PS/2 processor, PS/2 connector.
USB
Motherboard Bus controller (South Bridge), USB connector.
Docking port
Motherboard Docking logic, docking connector.
PCMCIA
Motherboard
PCMCIA socket
PCMCIA controller.
PCMCIA connectors.