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System Board Connector Pin Signals
Monitor Port Signals
Pin Signal Name I/O Pin Signal Name I/O
1 Red Video O 9 +5 V dc N/A
2 Green Video O 10 Synch Ground N/A
3 Blue Video O 11 No Connection N/A
4 No Connection N/A 12 Monitor ID Bit 1 I
5 Synch Ground N/A 13 Horizontal Synch O
6 Red Ground N/A 14 Vertical Synch O
7 Green Ground N/A 15 Monitor ID Bit 3 I
8 Blue Ground N/A
Serial Port Signals
Pin Signal Name I/O Pin Signal Name I/O
1
Data Carrier
Detect
I 6 Data Set Ready I
2 Receive Data I 7 Request To Send O
3 Transmit Data O 8 Clear To Send I
4 Data Terminal
Ready
O 9 Ring Indicator I
5 Signal Ground N/A
Parallel Port Signals
Pin Signal Name I/O Pin Signal Name I/O
1 Strobe O 14 Auto Feed N/A
2 Data Bit 0 I/O 15 Error I
3 Data Bit 1 I/O 16 Initialize O
4 Data Bit 2 I/O 17 Select (In) O
5 Data Bit 3 I/O 18 Ground Power
6 Data Bit 4 I/O 19 Ground Power