1 Hardware Overview 1.2 System Unit Block Diagram
1-12 TECRA 9100 Maintenance Manual (960-347)
Display Controller
One S3 Tristar 64C86C584 chip is used. The video controller incorporates, graphics
accelerator, video accelerator.
• 1.85 volt (core)/3.3 volt (interface) operation.
• Connected to AGP bus
• 3D accelerator function.
• Video RAM, VRAM 16MB is integrated in the VGAC
Sound Controller
• One Yamaha YMF753 chip is used.
• SW sound
EC/KBC (Embedded Controller/Keyboard Controller)
• One Mitsubishi M306K7F8LRLPC micon chip functions as both EC and
KBC.
• EC
This controller controls the following functions:
− Power supply sequence
− Thermal conditions
− LEDs
− Beep
− Device ON/OFF
− Fan speed
− Universal I/O port
− Docker Docking Sequence
− Battery capacity check
− Forced reset
− Flash rewriting
− EC interface
− I
2
C communication
− EC access
− Slim Select Bay Control
• KBC
This controller has the following functions:
− Scan controller to check status of keyboard matrix
− Interface controller between the keyboard scan controller and the system
− Control of switching and simultaneous operation of the accupoint/external
PS/2 mouse and of the internal keyboard/external PS/2 keyboard
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