Table 1-13. Functional Structure 1-14 Product Information HP OmniBook 900 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.