TANDY 1000 RLX/B  (250-1452/53/B)        Pinouts        Faxback Doc. # 1346

Printer - 25 pin (D-Sub):    Keyboard & P/S 2-Style    RS-232C Serial Port:
                             Mouse Connectors:
1  Strobe          18 GND                              Pin  Function:
+  Data 0          19 GND    Pin   Function
3  Data 1          20 GND                               1   Carrier Detect
4  Data 2          21 GND     1    Data                 2   Receive Data
5  Data 3          22 GND     2    Reserved             3   Transmit Data
6  Data 4          23 GND     3    Ground               4   Data Terminal Ready
7  Data 5          24 GND     4    +5 Vdc               5   Signal Ground
8  Data 6          25 GND     5    Clock                6   Data Set Ready
9  Data 7                     6    Reserved             7   Request to Send
10 Acknowledge                                          8   Clear to Send
11 Busy                                                 9   Ring Indicator
12 Paper End                                        
13 Select                  
14 Auto Feed                               Video Port Connector:
15 Error                         
16 Initialize                              Pin  Function
17 Select In                                      
                                            1   Red
Left Joystick:                              2   Green 
                                            3   Blue
1  Position 1    2  Position 2              4   No Connection
3  GND           4  Open                    5   Ground 
5  Power         6  Ground                  6   Ground
7  Switch 1      8  Switch 2                7   Ground
                                            8   Ground
Right Joystick:                             9   No Connection
                                           10   Ground
1  Position 3    2  Position 4             11   Ground
3  Ground        4  Open                   12   Ground
5  Power         6  Ground                 13   Horizontal Sync
7  Switch 3      8  Switch 4               14   Vertical Sync
                                           15   No Connection