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APPENDIX A PROGRAMMING THE
WATCHDOG TIMER .......................... 101
A.1 Programming the Watchdog Timer ...................... 102
APPENDIX B FULL DISASSEMBLY
PROCEDURES ................................... 105
APPENDIX C I/O PIN ASSIGNMENTS...... 111
C.1 Keyboard connector (CN8-1) .................................. 112
C.2 Mouse connector (CN8-2) ....................................... 112
C.3 COM1 RS-232 serial port (CN1) ............................. 112
C.4 COM3 RS-232 serial port (CN4) ............................. 113
C.5 COM4 RS-232 serial port (CN5) ............................. 113
C.6 COM2 (CN2) .......................................................... 114
C.7 Parallel port connector (CN3) ................................. 115
Table
Table 4-1: Jumpers and their functions ............................................... 31
Table 4-2: Connectors on the PPC-S123 motherboard ........................ 33
Table 4-3: Clear CMOS / External RTC (JP7)...................................... 35
Table 4-4: COM2 RS-232/422/485 setting (JP2, JP3).......................... 35
Table 4-5: COM2 RS-232/422/485 setting (JP4).................................. 36
Table 4-6: Serial port default settings ..................................................36
Table 4-7: COM3/COM4 pin 9 setting (JP5) ........................................ 37
Table 4-8: Watchdog activity selection (JP6) ...................................... 38
Table C-1: Keyboard connector ........................................................ 112
Table C-2: Mouse connector ............................................................. 112
Table C-3: COM1 RS-232 serial port ................................................. 112
Table C-4: COM3 RS-232 serial port ................................................. 113
Table C-5: COM4 RS-232 serial port ................................................. 113
Table C-6: COM2 .............................................................................. 114
Table C-7: Parallel port connector ..................................................... 115