65 lines
1.3 KiB
C++
65 lines
1.3 KiB
C++
#include <input/joypad.h>
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Joypad::Joypad(Cpu& cpu)
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: cpu(cpu), action_select(false),
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direction_select(false),
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keystates{false}
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{}
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void Joypad::setKeyState(Key k, bool pressed)
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{
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bool prevState = keystates[k];
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keystates[k] = pressed;
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if(!pressed || prevState == pressed)
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return;
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switch(k)
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{
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case A:
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case B:
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case Select:
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case Start:
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if (action_select)
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cpu.signalInterrupt(INT_Joypad);
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break;
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case Right:
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case Left:
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case Up:
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case Down:
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if (direction_select)
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cpu.signalInterrupt(INT_Joypad);
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break;
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}
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}
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void Joypad::write8(u16 /*addr*/, u8 data)
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{
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action_select = !(data & P1ActionSelect);
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direction_select = !(data & P1DirectionSelect);
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}
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u8 Joypad::read8(u16 /*addr*/)
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{
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u8 val = 0x0F;
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if(action_select)
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val &=
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(keystates[Start] ? 0 : P1Start) |
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(keystates[Select] ? 0 : P1Select) |
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(keystates[B] ? 0 : P1B) |
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(keystates[A] ? 0 : P1A);
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if(direction_select)
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val &=
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(keystates[Down] ? 0 : P1Down) |
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(keystates[Up] ? 0 : P1Up) |
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(keystates[Left] ? 0 : P1Left) |
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(keystates[Right] ? 0 : P1Right);
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val |= (action_select ? 0 : P1ActionSelect);
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val |= (direction_select ? 0 : P1DirectionSelect);
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return val;
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}
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