TANDY 1000 SL  (25-1401)            Pinouts             Faxback Doc. # 1265

The Computer pinouts are as follows:

GND = Ground     NC = Not Connected     * = Active Low Signal

Printer - 34 pin card edge:            Floppy - 34 pin card socket:

1   Strobe*          2   GND             1   NC         2   NC
3   Data 0           4   GND             3   +5V        4   NC
5   Data 1           6   GND             5   +5V        6   NC
7   Data 2           8   GND             7   +5V        8   Index*
9   Data 3           10  GND             9   +5V        10  Drive Select 0*
11  Data 4           12  GND             11  +5V        12  Drive Select 1*
13  Data 5           14  GND             13  GND        14  Drive Select 2*
15  Data 6           16  GND             15  GND        16  Motor On*
17  Data 7           18  GND             17  GND        18  Direction*
19  Acknowledge*     20  GND             19  GND        20  Step*
21  Busy             22  GND             21  GND        22  Write Data*
23  Paper Out*       24  GND             23  GND        24  Write Enable*
25  Select* (busy*)  26  NC              25  GND        26  Track 0*
27  Auto Feed*       28  Fault*          27  GND        28  Write Protect*
29  NC               30  Initialize*     29  +12V       30  Read Data*
31  GND              32  NC              31  +12V       32  Side Select*
33  GND              34  +5V             33  +12V       34  tsDisk Change*

Joystick - 6 pin DIN (2):       Keyboard - 7 pin DIN:      RGB - DB-9 Female:

1  Y Axis    2  X Axis          1  Keyboard Clock          1  GND
3  GND       4  Switch 1        2  Keyboard Data           2  GND
5  +5V       6  Switch 2        3  Keyboard Reset*         3  Red
                                4  GND                     4  Green
Speaker - 2 pin header:         5  +5V                     5  Blue
                                6  Keyboard Busy           6  Intensity
1  Sound     2  GND             7  Keyboard Type           7  Green (MONO)
                                                           8  Horizontal Sync
Serial Port - DB-9 Male:                                   9  Vertical Sync
                                Power Connector (2):
1  Carrier Detect                                          Audio Jack:
2  Receive Data                 1  +12V   (violet)            
3  Transmit Data                2  GND    (black)          1  Sound         
4  Data Terminal Ready          3  GND    (black)          2  GND  
5  Signal Ground                4  +5V    (red)                   
6  Data Set Ready                                          Microphone Jack:
7  Request to Send                                        
8  Clear to Send                                           1  Audio In
9  Ring Indicate                                           2  GND