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bsnes/asnes/input/input.cpp

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#ifdef SYSTEM_CPP
Input input;
uint8 Input::port_read(bool portnumber) {
if(cartridge.has_serial() && portnumber == 1) {
return serial.latch();
}
port_t &p = port[portnumber];
switch(p.device) {
case Device::Joypad: {
if(cpu.joylatch() == 0) {
if(p.counter0 >= 16) return 1;
return system.interface->input_poll(portnumber, p.device, 0, p.counter0++);
} else {
return system.interface->input_poll(portnumber, p.device, 0, 0);
}
} //case Device::Joypad
case Device::Multitap: {
if(cpu.joylatch()) return 2; //when latch is high -- data2 = 1, data1 = 0
unsigned deviceidx, deviceindex0, deviceindex1;
uint8 mask = (portnumber == 0 ? 0x40 : 0x80);
if(cpu.pio() & mask) {
deviceidx = p.counter0;
if(deviceidx >= 16) return 3;
p.counter0++;
deviceindex0 = 0; //controller 1
deviceindex1 = 1; //controller 2
} else {
deviceidx = p.counter1;
if(deviceidx >= 16) return 3;
p.counter1++;
deviceindex0 = 2; //controller 3
deviceindex1 = 3; //controller 4
}
return (system.interface->input_poll(portnumber, p.device, deviceindex0, deviceidx) << 0)
| (system.interface->input_poll(portnumber, p.device, deviceindex1, deviceidx) << 1);
} //case Device::Multitap
case Device::Mouse: {
if(p.counter0 >= 32) return 1;
int position_x = system.interface->input_poll(portnumber, p.device, 0, (unsigned)MouseID::X); //-n = left, 0 = center, +n = right
int position_y = system.interface->input_poll(portnumber, p.device, 0, (unsigned)MouseID::Y); //-n = up, 0 = center, +n = right
bool direction_x = position_x < 0; //0 = right, 1 = left
bool direction_y = position_y < 0; //0 = down, 1 = up
if(position_x < 0) position_x = -position_x; //abs(position_x)
if(position_y < 0) position_y = -position_y; //abs(position_x)
position_x = min(127, position_x); //range = 0 - 127
position_y = min(127, position_y); //range = 0 - 127
switch(p.counter0++) { default:
case 0: return 0;
case 1: return 0;
case 2: return 0;
case 3: return 0;
case 4: return 0;
case 5: return 0;
case 6: return 0;
case 7: return 0;
case 8: return system.interface->input_poll(portnumber, p.device, 0, (unsigned)MouseID::Right);
case 9: return system.interface->input_poll(portnumber, p.device, 0, (unsigned)MouseID::Left);
case 10: return 0; //speed (0 = slow, 1 = normal, 2 = fast, 3 = unused)
case 11: return 0; // ||
case 12: return 0; //signature
case 13: return 0; // ||
case 14: return 0; // ||
case 15: return 1; // ||
case 16: return (direction_y) & 1;
case 17: return (position_y >> 6) & 1;
case 18: return (position_y >> 5) & 1;
case 19: return (position_y >> 4) & 1;
case 20: return (position_y >> 3) & 1;
case 21: return (position_y >> 2) & 1;
case 22: return (position_y >> 1) & 1;
case 23: return (position_y >> 0) & 1;
case 24: return (direction_x) & 1;
case 25: return (position_x >> 6) & 1;
case 26: return (position_x >> 5) & 1;
case 27: return (position_x >> 4) & 1;
case 28: return (position_x >> 3) & 1;
case 29: return (position_x >> 2) & 1;
case 30: return (position_x >> 1) & 1;
case 31: return (position_x >> 0) & 1;
}
} //case Device::Mouse
case Device::SuperScope: {
if(portnumber == 0) break; //Super Scope in port 1 not supported ...
if(p.counter0 >= 8) return 1;
if(p.counter0 == 0) {
//turbo is a switch; toggle is edge sensitive
bool turbo = system.interface->input_poll(portnumber, p.device, 0, (unsigned)SuperScopeID::Turbo);
if(turbo && !p.superscope.turbolock) {
p.superscope.turbo = !p.superscope.turbo; //toggle state
p.superscope.turbolock = true;
} else if(!turbo) {
p.superscope.turbolock = false;
}
//trigger is a button
//if turbo is active, trigger is level sensitive; otherwise it is edge sensitive
p.superscope.trigger = false;
bool trigger = system.interface->input_poll(portnumber, p.device, 0, (unsigned)SuperScopeID::Trigger);
if(trigger && (p.superscope.turbo || !p.superscope.triggerlock)) {
p.superscope.trigger = true;
p.superscope.triggerlock = true;
} else if(!trigger) {
p.superscope.triggerlock = false;
}
//cursor is a button; it is always level sensitive
p.superscope.cursor = system.interface->input_poll(portnumber, p.device, 0, (unsigned)SuperScopeID::Cursor);
//pause is a button; it is always edge sensitive
p.superscope.pause = false;
bool pause = system.interface->input_poll(portnumber, p.device, 0, (unsigned)SuperScopeID::Pause);
if(pause && !p.superscope.pauselock) {
p.superscope.pause = true;
p.superscope.pauselock = true;
} else if(!pause) {
p.superscope.pauselock = false;
}
p.superscope.offscreen =
p.superscope.x < 0 || p.superscope.x >= 256
|| p.superscope.y < 0 || p.superscope.y >= (ppu.overscan() ? 240 : 225);
}
switch(p.counter0++) {
case 0: return p.superscope.trigger;
case 1: return p.superscope.cursor;
case 2: return p.superscope.turbo;
case 3: return p.superscope.pause;
case 4: return 0;
case 5: return 0;
case 6: return p.superscope.offscreen;
case 7: return 0; //noise (1 = yes)
}
} //case Device::SuperScope
case Device::Justifier:
case Device::Justifiers: {
if(portnumber == 0) break; //Justifier in port 1 not supported ...
if(p.counter0 >= 32) return 1;
if(p.counter0 == 0) {
p.justifier.trigger1 = system.interface->input_poll(portnumber, p.device, 0, (unsigned)JustifierID::Trigger);
p.justifier.start1 = system.interface->input_poll(portnumber, p.device, 0, (unsigned)JustifierID::Start);
if(p.device == Device::Justifiers) {
p.justifier.trigger2 = system.interface->input_poll(portnumber, p.device, 1, (unsigned)JustifierID::Trigger);
p.justifier.start2 = system.interface->input_poll(portnumber, p.device, 1, (unsigned)JustifierID::Start);
} else {
p.justifier.x2 = -1;
p.justifier.y2 = -1;
p.justifier.trigger2 = false;
p.justifier.start2 = false;
}
}
switch(p.counter0++) {
case 0: return 0;
case 1: return 0;
case 2: return 0;
case 3: return 0;
case 4: return 0;
case 5: return 0;
case 6: return 0;
case 7: return 0;
case 8: return 0;
case 9: return 0;
case 10: return 0;
case 11: return 0;
case 12: return 1; //signature
case 13: return 1; // ||
case 14: return 1; // ||
case 15: return 0; // ||
case 16: return 0;
case 17: return 1;
case 18: return 0;
case 19: return 1;
case 20: return 0;
case 21: return 1;
case 22: return 0;
case 23: return 1;
case 24: return p.justifier.trigger1;
case 25: return p.justifier.trigger2;
case 26: return p.justifier.start1;
case 27: return p.justifier.start2;
case 28: return p.justifier.active;
case 29: return 0;
case 30: return 0;
case 31: return 0;
}
} //case Device::Justifier(s)
} //switch(p.device)
//no device connected
return 0;
}
//scan all input; update cursor positions if needed
void Input::update() {
system.interface->input_poll();
port_t &p = port[1];
switch(p.device) {
case Device::SuperScope: {
int x = system.interface->input_poll(1, p.device, 0, (unsigned)SuperScopeID::X);
int y = system.interface->input_poll(1, p.device, 0, (unsigned)SuperScopeID::Y);
x += p.superscope.x;
y += p.superscope.y;
p.superscope.x = max(-16, min(256 + 16, x));
p.superscope.y = max(-16, min(240 + 16, y));
latchx = p.superscope.x;
latchy = p.superscope.y;
} break;
case Device::Justifier:
case Device::Justifiers: {
int x1 = system.interface->input_poll(1, p.device, 0, (unsigned)JustifierID::X);
int y1 = system.interface->input_poll(1, p.device, 0, (unsigned)JustifierID::Y);
x1 += p.justifier.x1;
y1 += p.justifier.y1;
p.justifier.x1 = max(-16, min(256 + 16, x1));
p.justifier.y1 = max(-16, min(240 + 16, y1));
int x2 = system.interface->input_poll(1, p.device, 1, (unsigned)JustifierID::X);
int y2 = system.interface->input_poll(1, p.device, 1, (unsigned)JustifierID::Y);
x2 += p.justifier.x2;
y2 += p.justifier.y2;
p.justifier.x2 = max(-16, min(256 + 16, x2));
p.justifier.y2 = max(-16, min(240 + 16, y2));
if(p.justifier.active == 0) {
latchx = p.justifier.x1;
latchy = p.justifier.y1;
} else {
latchx = (p.device == Device::Justifiers ? p.justifier.x2 : -1);
latchy = (p.device == Device::Justifiers ? p.justifier.y2 : -1);
}
} break;
}
if(latchy < 0 || latchy >= (ppu.overscan() ? 240 : 225) || latchx < 0 || latchx >= 256) {
//cursor is offscreen, set to invalid position so counters are not latched
latchx = ~0;
latchy = ~0;
} else {
//cursor is onscreen
latchx += 40; //offset trigger position to simulate hardware latching delay
latchx <<= 2; //dot -> clock conversion
latchx += 2; //align trigger on half-dot ala interrupts (speed optimization for sCPU::add_clocks)
}
}
void Input::port_set_device(bool portnumber, Device device) {
port_t &p = port[portnumber];
p.device = device;
p.counter0 = 0;
p.counter1 = 0;
//set iobit to true if device is capable of latching PPU counters
iobit = port[1].device == Device::SuperScope
|| port[1].device == Device::Justifier
|| port[1].device == Device::Justifiers;
latchx = -1;
latchy = -1;
if(device == Device::SuperScope) {
p.superscope.x = 256 / 2;
p.superscope.y = 240 / 2;
p.superscope.trigger = false;
p.superscope.cursor = false;
p.superscope.turbo = false;
p.superscope.pause = false;
p.superscope.offscreen = false;
p.superscope.turbolock = false;
p.superscope.triggerlock = false;
p.superscope.pauselock = false;
} else if(device == Device::Justifier) {
p.justifier.active = 0;
p.justifier.x1 = 256 / 2;
p.justifier.y1 = 240 / 2;
p.justifier.x2 = -1;
p.justifier.y2 = -1;
p.justifier.trigger1 = false;
p.justifier.trigger2 = false;
p.justifier.start1 = false;
p.justifier.start2 = false;
} else if(device == Device::Justifiers) {
p.justifier.active = 0;
p.justifier.x1 = 256 / 2 - 16;
p.justifier.y1 = 240 / 2;
p.justifier.x2 = 256 / 2 + 16;
p.justifier.y2 = 240 / 2;
p.justifier.trigger1 = false;
p.justifier.trigger2 = false;
p.justifier.start1 = false;
p.justifier.start2 = false;
}
}
void Input::poll() {
port[0].counter0 = 0;
port[0].counter1 = 0;
port[1].counter0 = 0;
port[1].counter1 = 0;
port[1].justifier.active = !port[1].justifier.active;
}
void Input::init() {
}
#endif
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