This note contains pinouts for the following IBM PC connectors: Color Graphics Adapter Game Adapter Monochrome Display Adapter Parallel Printer Port Serial (RS-232C) Port ======================================================================= Pin Assignment for the IBM Color Graphics Adapter 1. Ground Composite Jack 2. Ground 3. Red Center=Comp Video Signal w1.5 Volts 4. Green Outside=Ground 5. Blue 6. Intensity 7. Reserved 8. Horizontal Drive 9. Vertical Drive ======================================================================= Pin Assignment for the Game Adapter 1. +5 VDC 2. Button 1 3. Position 0 (X Coordinate) 4. Ground 5. Ground 6. Position 1 (Y Coordinate) 7. Button 2 8. +5 VDC JOYSTICK "A" DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD 9. +5 VDC JOYSTICK "B" 10. Button 3 11. Position 2 (X Coordinate) 12. Ground 13. Position 3 (Y Coordinate) 14. Button 4 15. +5 VDC ======================================================================= Pin Assignment for IBM Monochrome Interface 1. Ground 2. Ground 3. N/C 4. N/C 5. N/C 6. + Intensity 7. + Video 8. + Horizontal 9. - Vertical Signal voltages are: 0 to .6 VDC at the Low Level +5 VDC at the High Level ======================================================================= Pin Assignment for Parallel Port (Amphenol 57-30360) 1. STROBE (Normal=High, Data read-in when Low) 2. DATA 1 3. DATA 2 4. DATA 3 5. DATA 4 6. DATA 5 7. DATA 6 8. DATA 7 9. DATA 8 10. ACKNLG (w5us pulse,low=data rcvd and printer is ready) 11. BUSY 12. PE (High=printer out of paper) 13. SLCT (printer is in the selected state) 14. AUTO FEED XT (low=paper automatically fed one line after printing) 15. N/C 16. 0V (Logic Ground Level) 17. Chassis Ground 18. N/C 19 - 30. Ground connectors 31. INIT (Normal=High, Low=printer controller reset, buffer cleared) 32. ERROR (Low=Paper End State, Off-Line State, or Error State) 33. Ground 34. N/C 35. +5 VDC thru a 4.7Kj resistor 36. SLCT IN (Low=Data Entry Possible) ======================================================================= Pin Assignment for the Serial Port (RS-232C) PC <--> AT 1. N/C 25-pin <--> 9-pin 2. Transmit Data 2 <--> 3 3. Receive Data 3 <--> 2 4. RTS (Request To Send) 4 <--> 7 5. CTS (Clear To Send) 5 <--> 8 6. DSR (Data Set Ready) 6 <--> 6 7. Signal Ground 8 <--> 5 8. CD (Carrier Detect) 8 <--> 1 9. +Transmit Current Loop Return (20ma) 10. N/C 11. -Transmit Current Loop Data (20ma) 12. N/C 13. N/C 14. N/C 15. N/C 16. N/C 17. N/C 18. +Receive Current Loop Data (20ma) 19. N/C 20. DTR (Data Terminal Ready) 20 <--> 4 21. N/C 22. RI (Ring Indicator) 22 <--> 9 23. N/C 24. N/C 25. -Receive Current Loop Return (20ma) (The columns on the right indicate the connections that need to be made to connect a 25 pin port to a 9 pin port. The extreme rightmost column of that chart indicates the equivalent pins on the standard AT serial adapter. active 56 Rename a file. 57 Get/Set a file's date and time. e result in AL, scan code in AH A