Tandy 1000 SX (250-1051)          Pinouts                Faxback Doc. # 1184

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

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

1  Strobe*          2  GND             1  GND              2  NC
3  Data 0           4  GND             3  GND              4  NC
5  Data 1           6  GND             5  GND              6  NC
7  Data 2           8  GND             7  GND              8  Index*
9  Data 3           10 GND             9  GND              10 Drive Select 0*
11 Data 4           12 GND             11 GND              12 Drive Select 1*
13 Data 5           14 GND             13 GND              14 NC
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 GND              30 Read Data*
31 GND              32 NC              31 GND              32 Side Select*
33 GND              34 +5V             33 GND              34 Drive Ready*

Joystick - 6 pin DIN (2)        Keyboard - 8 pin DIN      RGB - DB-9 Female

1  Y Axis    2  X Axis          1  Keyboard Data          1  GND
3  GND       4  Switch 1        2  Keyboard Busy*         2  GND
5  +5V       6  Switch 2        3  GND                    3  Red
                                4  Keyboard Clock*        4  Green
Light Pen - DB-5 Male           5  +5V                    5  Blue
                                6  Keyboard Reset         6  Intensity
1  +5 v    2  GND               7  Mulit Data             7  +12V
3  LPIN    4  LP Switch         8  Multi Clock            8  Horizontal Sync
5  NC      6  LP Switch                                   9  Vertical Sync
7  NC      8  NC                
9  NC                           Power Connector (1)       Composite Output
                                 
Speaker - 2 pin header          1  +12V   (violet)        A  Video        
                                3  GND    (black)         B  Audio
1  Sound    2  GND              3  GND    (black)                   
                                4  +5V    (red)

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