Toshiba 420CDT User Manual page 7

• Others
- Speaker volume adjust PWM control
- Sound board interface
- BIOS-ROM interface
- SMI control
- IrDA (SIR) control
Video Controller
Chips & Technologies F65550 is used
This video controller controls internal TFT/DSTN color LCD and external SVGA
compatible CRT.
Keyboard Controller (KBC)
One M38802M4 chip is used
This KBC includes the keyboard scan controller and keyboard interface
controller. The KBC controls the internal keyboard, external keyboard, and
PS/2 mouse.
AccuPoint Controller (IPSC)
One KPAAC0062A chip is used
This controller provides simultaneous control of both the AccuPoint and a
PS/2 mouse.
Real Time Clock (RTC)
One T9934 chip is used
The T9934 has 128 bytes of memory. Fourteen bytes of memory are used for the
calendar and clock. The remaining 114 bytes are used for the system configuration
data.
420 Series
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