Toshiba T4900CT - Page 8

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T4900CT
ISA Bus Controller Gate Array
This gate array has the following functions:
• Bus controller
- 32 to/from 16-bit bus width convert
- ISA bus interface control
- ISA bus access control
- DMAC control
- DMA address generate
- I/O control
• Memory Controller
- ISA bus interface control
- Refresh address control
• I/O Register
- ISA compatible bus I/O port
- Special Registers
• Suspend/Resume Controller
Sub LCD Controller Gate Array
This gate array has the following functions:
• Status Indicator Panel Controller
- LCD Segment Flashing Controller
• Internal Communication Controller
- KBC/Power Supply (PS) Micro Processor Interrupt Controller
- KBC/PS microprocessor/Main CPU Communication Controller
IC Card Controller Gate Array
This gate array has the following functions:
• IC Card Controller
- PCMCIA IC Card Controller
- Toshiba Modem Card Controller
• EEPROM (for security) Controller
- KBC-Security-EEPROM Communication Controller
• Others
- KBC Communication Controller
- Disable the PRT/FDD Port, HDD Access Controller
- EEPROM (for BIOS) Access Mode Controller
- Sound System Access Controller