Nes-Controller.txt

Nes Controller

Each switch can be mapped to a bit in a byte, so that 1 is "pressed" and 0 is "not pressed".
There are eight switches, so the controller state fits into a single byte:

|-----------|-------|------|------|------|-------|--------|-----|-----|
| Bit index |   7   |   6  |   5  |   4  |   3   |   2    |  1  |  0  |
|-----------|-------|------|------|------|-------|--------|-----|-----|
| Switch    | right | left | down |  up  | start | select |  B  |  A  |                                                  
|-----------|-------|------|------|------|-------|--------|-----|-----|

// poll controller i (0-1)
pad = pad_poll(i);

// reads controller i in trigger mode 
pad = pad_trigger(i);

// gets the last known state of controller input
pad pad_state(i);

|------------------------------------------------------------------|
|          U                                                       |
|          /\                                                      |
|          |                                                       |
|          |Joypad                                                 |
|  L <- - -O- - -> R    select     start                           |  
|          |         |--------| |--------|  |------|  |------|     |
|          |         |--------| |--------|  |   B  |  |   A  |     |
|          \/                               |------|  |------|     |
|          D                                                       | 
|                                                                  | 
|------------------------------------------------------------------|