2500 SX/33  (250-1623)             Pinouts              Faxback Doc. # 1708



Parallel I/O Port - DB-25 Female           RS-232C Serial Port - DB-9 Male

Pin     Signal                               Pin     Signal

 1      Strobe *                              1      Carrier Detect
 2      Data Bit 0                            2      Receive Data
 3      Data Bit 1                            3      Transmit Data
 4      Data Bit 2                            4      Data Terminal Ready
 5      Data Bit 3                            5      Signal Ground
 6      Data Bit 4                            6      Data Set Ready
 7      Data Bit 5                            7      Request To Send
 8      Data Bit 6                            8      Clear To Send
 9      Data Bit 7                            9      Ring Indicator
10      Acknowledge *                         
11      Busy                                  Keyboard and Mouse Connectors
12      Paper End                             6 Pin Mini-Din Female
13      Select
14      Auto Feed *                           Pin     Signal
15      Error *
16      Initialize *                           1      Data
17      Select In                              2      Reserved
18-25   Ground                                 3      Ground
                                               4      +5 VDC
 * = Active Low Signal                         5      Clock
                                               6      Reserved

VGA Video Port - DB-15 Female

Pin     Signal

 1      Red Video
 2      Green Video
 3      Blue Video
 4      Monitor ID Bit 2 (diagnostic)
 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)