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optixx
2009-04-22 20:04:28 +02:00
parent 55e3468f74
commit 0c378a9f7c
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341
tools/bsnes/snes/input/input.cpp Executable file
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#ifdef SNES_CPP
uint8 SNES::Input::port_read(bool portnumber) {
port_t &p = port[portnumber];
switch(p.device) {
case DeviceJoypad: {
if(p.counter0 >= 16) return 1;
unsigned deviceid = (portnumber == 0 ? DeviceIDJoypad1 : DeviceIDJoypad2);
return snesinterface.input_poll(deviceid, p.counter0++);
} //case DeviceJoypad
case DeviceMultitap: {
if(cpu.joylatch()) return 2; //when latch is high -- data2 = 1, data1 = 0
unsigned deviceidx, deviceid0, deviceid1;
if(portnumber == 0) {
if(cpu.pio() & 0x40) {
deviceidx = p.counter0;
if(deviceidx >= 16) return 3;
p.counter0++;
deviceid0 = DeviceIDMultitap1A;
deviceid1 = DeviceIDMultitap1B;
} else {
deviceidx = p.counter1;
if(deviceidx >= 16) return 3;
p.counter1++;
deviceid0 = DeviceIDMultitap1C;
deviceid1 = DeviceIDMultitap1D;
}
} else {
if(cpu.pio() & 0x80) {
deviceidx = p.counter0;
if(deviceidx >= 16) return 3;
p.counter0++;
deviceid0 = DeviceIDMultitap2A;
deviceid1 = DeviceIDMultitap2B;
} else {
deviceidx = p.counter1;
if(deviceidx >= 16) return 3;
p.counter1++;
deviceid0 = DeviceIDMultitap2C;
deviceid1 = DeviceIDMultitap2D;
}
}
return (snesinterface.input_poll(deviceid0, deviceidx) << 0)
| (snesinterface.input_poll(deviceid1, deviceidx) << 1);
} //case DeviceMultitap
case DeviceMouse: {
if(p.counter0 >= 32) return 1;
unsigned deviceid = (portnumber == 0 ? DeviceIDMouse1 : DeviceIDMouse2);
int position_x = snesinterface.input_poll(deviceid, MouseX); //-n = left, 0 = center, +n = right
int position_y = snesinterface.input_poll(deviceid, MouseY); //-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 snesinterface.input_poll(deviceid, MouseRight);
case 9: return snesinterface.input_poll(deviceid, MouseLeft);
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 DeviceMouse
case DeviceSuperScope: {
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 = snesinterface.input_poll(DeviceIDSuperScope, SuperScopeTurbo);
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 = snesinterface.input_poll(DeviceIDSuperScope, SuperScopeTrigger);
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 = snesinterface.input_poll(DeviceIDSuperScope, SuperScopeCursor);
//pause is a button; it is always edge sensitive
p.superscope.pause = false;
bool pause = snesinterface.input_poll(DeviceIDSuperScope, SuperScopePause);
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 DeviceSuperScope
case DeviceJustifier:
case DeviceJustifiers: {
if(portnumber == 0) break; //Justifier in port 1 not supported ...
if(p.counter0 >= 32) return 1;
if(p.counter0 == 0) {
p.justifier.trigger1 = snesinterface.input_poll(DeviceIDJustifier1, JustifierTrigger);
p.justifier.start1 = snesinterface.input_poll(DeviceIDJustifier1, JustifierStart);
if(p.device == DeviceJustifiers) {
p.justifier.trigger2 = snesinterface.input_poll(DeviceIDJustifier2, JustifierTrigger);
p.justifier.start2 = snesinterface.input_poll(DeviceIDJustifier2, JustifierStart);
} 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 DeviceJustifier(s)
} //switch(p.device)
//no device connected
return 0;
}
//scan all input; update cursor positions if needed
void SNES::Input::update() {
snesinterface.input_poll();
port_t &p = port[1];
switch(p.device) {
case DeviceSuperScope: {
int x = snesinterface.input_poll(DeviceIDSuperScope, SuperScopeX);
int y = snesinterface.input_poll(DeviceIDSuperScope, SuperScopeY);
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 DeviceJustifier:
case DeviceJustifiers: {
int x1 = snesinterface.input_poll(DeviceIDJustifier1, JustifierX);
int y1 = snesinterface.input_poll(DeviceIDJustifier1, JustifierY);
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 = snesinterface.input_poll(DeviceIDJustifier2, JustifierX);
int y2 = snesinterface.input_poll(DeviceIDJustifier2, JustifierY);
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 == DeviceJustifiers ? p.justifier.x2 : -1);
latchy = (p.device == DeviceJustifiers ? p.justifier.y2 : -1);
}
} break;
}
}
void SNES::Input::port_set_device(bool portnumber, unsigned 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 == DeviceSuperScope
|| port[1].device == DeviceJustifier
|| port[1].device == DeviceJustifiers;
latchx = -1;
latchy = -1;
if(device == DeviceSuperScope) {
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 == DeviceJustifier) {
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 == DeviceJustifiers) {
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 SNES::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 SNES::Input::init() {
}
#endif //ifdef SNES_CPP

114
tools/bsnes/snes/input/input.hpp Executable file
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class Input {
public:
enum Device {
DeviceNone,
DeviceJoypad,
DeviceMultitap,
DeviceMouse,
DeviceSuperScope,
DeviceJustifier,
DeviceJustifiers,
};
enum DeviceID {
DeviceIDNone,
DeviceIDJoypad1,
DeviceIDJoypad2,
DeviceIDMultitap1A,
DeviceIDMultitap1B,
DeviceIDMultitap1C,
DeviceIDMultitap1D,
DeviceIDMultitap2A,
DeviceIDMultitap2B,
DeviceIDMultitap2C,
DeviceIDMultitap2D,
DeviceIDMouse1,
DeviceIDMouse2,
DeviceIDSuperScope,
DeviceIDJustifier1,
DeviceIDJustifier2,
};
enum JoypadID {
JoypadB = 0, JoypadY = 1,
JoypadSelect = 2, JoypadStart = 3,
JoypadUp = 4, JoypadDown = 5,
JoypadLeft = 6, JoypadRight = 7,
JoypadA = 8, JoypadX = 9,
JoypadL = 10, JoypadR = 11,
};
enum MouseID {
MouseX = 0, MouseY = 1,
MouseLeft = 2, MouseRight = 3,
};
enum SuperScopeID {
SuperScopeX = 0, SuperScopeY = 1,
SuperScopeTrigger = 2, SuperScopeCursor = 3,
SuperScopeTurbo = 4, SuperScopePause = 5,
};
enum JustifierID {
JustifierX = 0, JustifierY = 1,
JustifierTrigger = 2, JustifierStart = 3,
};
uint8 port_read(bool port);
void port_set_device(bool port, unsigned device);
void init();
void poll();
void update();
//light guns (Super Scope, Justifier(s)) strobe IOBit whenever the CRT
//beam cannon is detected. this needs to be tested at the cycle level
//(hence inlining here for speed) to avoid 'dead space' during DRAM refresh.
//iobit is updated during port_set_device(),
//latchx, latchy are updated during update() (once per frame)
alwaysinline void tick() {
//only test if Super Scope or Justifier is connected
if(iobit) {
if(ppu.vcounter() == latchy //test Y cursor position
&& ppu.hcounter() == latchx << 2 //test X cursor position (cycles == pixels << 2)
&& latchy < (ppu.overscan() ? 240 : 225) //verify Y is not offscreen
&& latchx < 256 //verify X is not offscreen
) ppu.latch_counters();
}
}
private:
bool iobit;
uint16_t latchx, latchy;
struct port_t {
unsigned device;
unsigned counter0; //read counters
unsigned counter1;
struct superscope_t {
int x, y;
bool trigger;
bool cursor;
bool turbo;
bool pause;
bool offscreen;
bool turbolock;
bool triggerlock;
bool pauselock;
} superscope;
struct justifier_t {
bool active;
int x1, x2;
int y1, y2;
bool trigger1, trigger2;
bool start1, start2;
} justifier;
} port[2];
friend class SNES;
} input;