T6600C, T6600C/CD, T6600C/CDV
1-7
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Keyboard Controller (KBC)
An M37506E1FP chip and an 8749 chip are used.
The M37506E1FP is a keyboard interface controller which controls the internal
keyboard, external keyboard port, and PS/2 mouse port. The 8749 chip is a keyboard
scan controller which is mounted inside the detachable keyboard unit.
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VGA Display Controller: WD90C31
This controller controls both internal and external VGA-compatible displays and
external SVGA-compatible displays with an Analog Digital Converter (DAC). The
controller can display data on the internal and external display simultaneously.
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SCSI Controller
An AIC6260 chip controls the internal Small Computer System Interface (SCSI) port.
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Sound Controller
An AD1848 chip controls the internal sound system.
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The Clock Generator receives 14.31818 MHz (X1) and generates the following
frequencies:
• 66 MHz for the CPU
• 14.7456 MHz for the COM
• 24 MHz for the FDC and VFO
• 16 MHz is used for KBC (8 MHz)
• 14.31818 MHz for VGA display controller
OSC (X3) generates 32.768 KHz for RTC
OSC (X) generates 24.576 MHz for sound system
OSC (X) generates 16.9344 MHz for sound system
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Gate Arrays
System Controller Gate Array
This gate array has the following functions:
•
CPU Control
•
Turbo Cache Control
•
Memory Control
- DRAM Control
- Compatible Bus Interface Control
•
Bus Controller
- Compatible Bus Interface Control
- Compatible Access Control
- DMAC Control
- I/O Control
