2-6
❑
MC146818AF Real Time Clock (RTC)
❑
Keyboard Controller (KBC)
The KBC controls the internal keyboard, numeric ten keypad port, and mouse port.
The block diagram of the T2200SX system unit is shown in Figure 2-1.
Figure 2-1 System unit block diagram
CPU
80386SX
SYSCNT-GA
MEMCNT
BUSCNT
BUSDRV
ADRDRV
NDP
80387SX
RTC
Main Memory
BIOS
ROM
SI9901
DMAC(80C37)x2
PIC(80C59)x2
TIM(80C54)x1
FDC(TC8565)x1
UART(TC8570)x1
VFO(TC8568)x1
IOCNTx1
Speaker
LCD
640x480
Display
Controller
3.5-inch FDD
RS-232-C
DRV
RGB
Port
COMMS
Port
VRAM
256KB
2.5-inch HDD/HDC
Expansion
Connector
150-pin
KBC
Ten-key
Port
Mouse
Port
Option
Keyboard
Built-in Optional
Modem Card
Optional Memory
Summary of Contents for T-Series T2200sx
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Page 17: ...2 1 Chapter 2 Operational Overview ...
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Page 43: ...3 1 Chapter 3 Troubleshooting Procedures ...
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Page 83: ...4 1 Chapter 4 Tests and Diagnostics ...
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Page 141: ...5 1 Chapter 5 Disassembly Procedures ...
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Page 169: ...6 1 Chapter 6 Reassembly Procedures ...
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Page 191: ...App 1 Appendices ...
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Page 196: ...App 6 Figure A 2 System board FSTFGx ICs back G G G G E F J H I K ...
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Page 200: ...App 10 Figure A 4 System board FSTFGx connectors back E A P Q ...
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Page 203: ...App 13 A 3 System Board FSTFGx OSCs Figure A 5 System board FSTFGx OSCs front F G H E ...
Page 204: ...App 14 Figure A 6 System board FSTFGx OSCs back A B C D ...
Page 215: ...App 25 Appendix C ASCII Character Codes Table C 1 ASCII character codes ...