2810 HD/20 (250-3551) Pinouts Faxback Doc. # 1509 Keyboard: 1. Data 6 5 2. Reserved * ┌─┐ * 3. Ground 4 │ │ 3 4. +5 Vdc * └─┘ * 5. Clock 2 1 6. Reserved * * Video Port: Pin Function Pin Function 1 Red Video 9 Key (no pin) 2 Green Video 10 Sync Return (Ground) 3 Blue Video 11 Monitor ID Bit 0 (Not Used) 4 Monitor ID Bit 2 (Not Used) 12 Monitor ID Bit 1 (Not Used) 5 Ground 13 Horizontal Sync 6 Red Return (Ground) 14 Vertical Sync 7 Green Return (Ground) 15 Not Used 8 Blue Return (Ground) Monochrome-type monitors use Green Video for all video input and ignore Red Video and Blue Video. Monitor ID Bits are not used. The monitor type is determined when your system is turned on. RS-232C Serial Port: Pin Function Pin Function 1 Carrier Detect 6 Data Set Ready 2 Receive Data 7 Request To Send 3 Transmit Data 8 Clear To Send 4 Data Terminal Ready 9 Ring Indicator 5 Signal Ground Parallel I/O Printer Port: Pin Function Pin Function 1 Strobe 10 Acknowledge 2 Data Bit 0 11 Busy 3 Data Bit 1 12 Paper End 4 Data Bit 2 13 Select 5 Data Bit 3 14 Auto Feed 6 Data Bit 4 15 Error 7 Data Bit 5 16 Initialize 8 Data Bit 6 17 Select In 9 Data Bit 7 18-25 Ground (jej-05/10/94)