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input_port [2016/05/25 17:44]
ex_writer
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-====== Input Ports ====== 
  
-^ Port Number (hex) ^ Equate ^ Function ^ 
-| 8 | INTST | [[magic register#​intercept|Intercept]] Status Feedback (collision detection) | 
-| E | VERAF | [[interrupt feedback#​light pen interrupt|Vertical Address Feedback]] ([[light pen]]) | 
-| F | HORAF | [[interrupt feedback#​light pen interrupt|Horizontal Address Feedback]] ([[light pen]]) | 
-| 10 | SW0 | Player 1 Control Handle | 
-| 11 | SW1 | Player 2 Control Handle | 
-| 12 | SW2 | Player 3 Control Handle | 
-| 13 | SW3 | Player 4 Control Handle | 
-| 14 | KEY0 | Keypad Column 0 (right) | 
-| 15 | KEY1 | Keypad Column 1 | 
-| 16 | KEY2 | Keypad Column 2 | 
-| 17 | KEY3 | Keypad Column 3 (left) | 
-| 1C | POT0 | Player 0 Pot | 
-| 1D | POT1 | Player 1 Pot | 
-| 1E | POT2 | Player 2 Pot | 
-| 1F | POT3 | Player 3 Pot | 
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-[NM:107, 143, source listing 5]