Functional Block Diagram ........................................................................................... 3-2
System BIOS........................................................................................................ 3-3
System Processor.................................................................................................. 3-3
Major Functional Blocks.............................................................................................. 3-4
System Logic Controller .............................................................................................. 3-4
Memory Subsystem ..................................................................................................... 3-6
DRAM Memory ................................................................................................... 3-6
ROM Memory ...................................................................................................... 3-7
I/O Subsystem ............................................................................................................. 3-7
Video Subsystem ......................................................................................................... 3-7
Keyboard Subsystem ................................................................................................... 3-9
Hard Disk Subsystem................................................................................................... 3-10
Power Subsystem ........................................................................................................ 3-11
AC Power Adapter ............................................................................................... 3-11
Internal Battery Pack ............................................................................................ 3-11
Powerboard .......................................................................................................... 3-12
Preventive Maintenance ............................................................................................... 4-1
Cleaning the Trackball .......................................................................................... 4-3
System Unit Assembly ................................................................................... 4-9
Contents
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