Each Amiga has two nine-pin connectors that can be used for input or output with a variety of controllers. Usually, the nine-pin connectors are used with a mouse or joystick but they will also accept input from light pens, paddles, trackballs, and other popular input devices. Figure 8-1 shows one of the two connectors and the corresponding face-on view of a standard controller plug, while table 8-1 gives the pin assignments for some typical controllers. Figure 8-1: Controller Plug and Computer Connector Table 8-1: Typical Controller Connections Mouse, Trackball, Proportional X-Y Driving Controller Proportional Pin Joystick Controller (Pair) Joystick Light Pen --- -------- ---------- ------------ ------------ --------- 1 Forward V-pulse --- Button 3** --- 2 Back H-pulse --- --- --- 3 Left VQ-pulse Left button Button 1 --- 4 Right HQ-pulse Right button Button 2 --- 5* --- Middle Right POT POT X Pen pressed button** to screen 6* Button 1 Left button --- --- Beam trigger 7 --- +5V +5V +5V +5V 8 GND GND GND GND GND 9* Button 2** Right button Left POT POT Y Button 2** * These pins may also be configured as outputs ** These buttons are optional Registers Used with the Controller Port Reading Mouse/Trackball Controllers Reading Digital Joystick Controllers Reading Proportional Controllers Reading a Light Pen Digital I/O on the Controller Port
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