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Mega Man 4/RAM map
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Joypad Memory
RAM
| RAM | Function | Description | Details |
| $14 | Joypad 1 - Button Push Bits | Bits possible values : [0 = Not Recently Pushed Down, 1 = Recently Pushed Down] | Bits signification |
| $15 | Joypad 2 - Button Push Bits | Bits possible values : [0 = Not Recently Pushed Down, 1 = Recently Pushed Down] | Bits signification |
| $16 | Joypad 1 - Button Status Bits | Bits possible values : [0 = Not Being Pressed Down, 1 = Being Pressed Down] | Bits signification |
| $17 | Joypad 2 - Button Status Bits | Bits possible values : [0 = Not Being Pressed Down, 1 = Being Pressed Down] | Bits signification |
<a id="Joypad_Bits_Signification">Bits signification of $14, $15, $16, $17</a>
LSB to MSB
| Bit | Function | Bit | Function |
| 0 | Right | 4 | Start |
| 1 | Left | 5 | Select |
| 2 | Down | 6 | B |
| 3 | Up | 7 | A |