Toshiba Tl000LE User Manual page 3

The system board in the TlOOOLE is composed of the following major components:
• Central processing unit: CPU (80C86-2)
The CPU is a 16-bit microprocessor operating at 9.54MHz
or 4.77MHz clock speed.
• Super integration: SI (T9776)
The SI stores the following components:
Direct Memory Access controller:
Programmable interrupt controller:
Programmable interval timer:
Floppy disk controller:
Universal asynchronousreceiver
and transmitter:
• Variable frequency oscillator: VFO (TC8568)
The VFO chip is used for FDD control logic.
• Real time clock: RTC (TC8521)
DMAC (TMP82C37 A)
PIC (TMP82C59A)
PIT (TMP82C53)
FDC (TC8565)
SIO (TC8570)
The R TC has memory in the chip which keeps the date, time,
and system configuration with an RTC battery.
• Keyboard controller: KBC (TMP80C49)
• Memories:
Standard RAM:
Backup RAM:
BIOS ROM:
Video RAM:
CGROM:
• Gate arrays:
I Mbyte
16 Kbytes
48 Kbytes
32 Kbytes
128 Kbytes
Memory and bus controller gate array:
I/O controller gate array:
SIECP3-GA (184-pin)
S lEIOI-GA (184-pin)
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