Table 1-13. Functional Structure HP OmniBook 2100/3000/3100 Product Information 1-15 Function Modules Roles Bootup CPU module Motherboard System BIOS IC** Keyboard BIOS IC** Floppy disk drive Hard disk drive Main processor (MMO). Primary system circuitry. Code for basic system functions. Code for keyboard 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 boards First 16 MB (OmniBook 3000) or 32 MB (OmniBook 2100/3100) of RAM, video RAM. Optional, additional RAM.
Power Battery Motherboard AC adapter Icon PCA Power storage. Power supply, ac adapter socket, system-off switch. AC-to-dc converter. Power switch, lid switch. Display Motherboard LCD module LVDS PCA* Inverter PCA Display/graphics controller, video RAM. Display output, backlight. Display drivers, signal processing. (Low-voltage differential signaling) Power converter for backlight. Hard disk Motherboard Hard disk drive Hard disk controller. Hard disk mechanism. Floppy drive Motherboard Floppy disk drive Floppy disk controller. Floppy disk mechanism. Keyboard Motherboard Keyboard BIOS IC** Keyboard Keyboard controller. Keyboard BIOS. Key switches.
Touch pad Motherboard Top case Keyboard and PS/2 controller. Touch pad PS/2 device. Audio Motherboard Audio PCA Top case Speaker amplifier, external audio jacks. Audio controller, wave synthesizer, headphone amplifier. Microphone, speakers. Serial Motherboard I/O controller, serial connector. Parallel Motherboard I/O controller, parallel connector. Infrared Motherboard IR PCA Icon PCA I/O controller. Infrared transmitter/receiver. Pass-through connection. PS/2 port Motherboard Keyboard and PS/2 controller, PS/2 connector. USB Motherboard USB PCA I/O controller. USB power controller, USB connector. Docking port Motherboard Docking logic, docking connector.
PCMCIA Motherboard PCMCIA controller, PCMCIA connectors. * The LVDS PCA is not present in products with 12-inch displays. In these products, the LVDS functions are performed by the LCD module. ** The BIOS IC on the OmniBook 2100/3100 performs both system and keyboard BIOS functions.