425 SX/T  (259-7700)               Pinouts              Faxback Doc. # 2270

RS-232 Serial Port:                       Keyboard/Mouse Port:

1.  Carrier Detect                        1.  Data        4.  +5 VDC
2.  Receive Data                          2.  Reserved    5.  Clock
3.  Transmit Data                         3.  Ground      6.  Reserved
4.  Data Terminal Ready
5.  Signal Ground
6.  Data Set Ready
7.  Request to Send
8.  Clear to Send
9.  Ring Indicator

Parallel I/O Port:

1. Strobe *          14. Auto Feed *
2. Data Bit 0        15. Error *
3. Data Bit 1        16. Initialize *
4. Data Bit 2        17. Select In
5. Data Bit 3        18. Ground
6. Data Bit 4        19. Ground
7. Data Bit 5        20. Ground
8. Data Bit 6        21. Ground
9. Data Bit 7        22. Ground
10. Acknowledge *    23. Ground
11. Busy             24. Ground
12. Paper End        25. Ground
13. Select

  * = Active Low Signal

Video Port:

1.  Red Video
2.  Green Video
3.  Blue Video
4.  Monitor ID Bit 2 (not used)
5.  Ground
6.  Red Return (ground)
7.  Green Return (ground)
8.  Blue Return (ground)
9.  Key (no pin)
10. Sync Return (ground)
11. Monitor ID Bit 0 (ground)
12. Monitor ID Bit 1 (ground)
13. Horizontal Sync
14. Vertical Sync
15. Not Used (diagnostic)

(rjs-05/21/93)