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1 Hardware Overview 1.1 Features
The PC contains the following components.
❑ CPU
Pentium® M
• A 900/600MHz Centrino processor with a 400MHz external clock, 100MHz
bus and 1.2V/1.05 core operation voltage (built-in NDP).
• Internal cache memory: 32KB Data and 32KB Instruction, Write-Back
• Secondary cache memory: 1MB (in CPU)
❑ Memory
One memory slot capable of accepting 256MB-memory module for a maximum of
512MB.
• 2.5V operation
• 140-pin exclusive memory board
• Access time : 6ns
• Memory Supporting PC-2100(Operation is PC100)
❑ BIOS ROM (Flash memory)
• 4Mbit (256K×16-bit chip)
− 64KB used for logo
− 64KB used for setup and checksum
− 128KB used for system BIOS
− 64KB used for VGA-BIOS
− 64KB used for ACPI
− 8KB used for PnP
− 8KB used for password security
− 16KB used for booting
− 64KB used for LAN
− 32KB are reserved
• 5.0V operation
• Access time : 120 ns or 90 ns
• Data transfer: 8-bit
1-6 PORTEGE R100 Maintenance Manual (960-440)