void SuperScope::enter() {
unsigned prev = 0;
while(true) {
unsigned next = cpu.vcounter() * 1364 + cpu.hcounter();
if(offscreen == false) {
unsigned target = y * 1364 + (x + 24) * 4;
if(next >= target && prev < target) {
//CRT raster detected, toggle iobit to latch counters
iobit(0);
iobit(1);
}
}
if(next < prev) {
//Vcounter wrapped back to zero; update cursor coordinates for start of new frame
int nx = interface()->inputPoll(port, Input::Device::SuperScope, 0, (unsigned)Input::SuperScopeID::X);
int ny = interface()->inputPoll(port, Input::Device::SuperScope, 0, (unsigned)Input::SuperScopeID::Y);
nx += x;
ny += y;
x = max(-16, min(256 + 16, nx));
y = max(-16, min(240 + 16, ny));
offscreen = (x < 0 || y < 0 || x >= 256 || y >= (ppu.overscan() ? 240 : 225));
}
prev = next;
step(2);
}
}
void Justifier::enter() {
unsigned prev = 0;
while(true) {
unsigned next = cpu.vcounter() * 1364 + cpu.hcounter();
signed x = (active == 0 ? player1.x : player2.x), y = (active == 0 ? player1.y : player2.y);
bool offscreen = (x < 0 || y < 0 || x >= 256 || y >= (ppu.overscan() ? 240 : 225));
if(offscreen == false) {
unsigned target = y * 1364 + (x + 24) * 4;
if(next >= target && prev < target) {
//CRT raster detected, toggle iobit to latch counters
iobit(0);
iobit(1);
}
}
if(next < prev) {
int nx1 = interface->inputPoll(port, Input::Device::Justifier, 0, (unsigned)Input::JustifierID::X);
int ny1 = interface->inputPoll(port, Input::Device::Justifier, 0, (unsigned)Input::JustifierID::Y);
nx1 += player1.x;
ny1 += player1.y;
player1.x = max(-16, min(256 + 16, nx1));
player1.y = max(-16, min(240 + 16, ny1));
}
if(next < prev && chained) {
int nx2 = interface->inputPoll(port, Input::Device::Justifiers, 1, (unsigned)Input::JustifierID::X);
int ny2 = interface->inputPoll(port, Input::Device::Justifiers, 1, (unsigned)Input::JustifierID::Y);
nx2 += player2.x;
ny2 += player2.y;
player2.x = max(-16, min(256 + 16, nx2));
player2.y = max(-16, min(240 + 16, ny2));
}
prev = next;
step(2);
}
}
uint2 Multitap::data() {
if(latched) return 2; //multitap detection
unsigned index, port1, port2;
if(iobit()) {
index = counter1;
if(index >= 16) return 3;
counter1++;
port1 = 0; //controller 1
port2 = 1; //controller 2
} else {
index = counter2;
if(index >= 16) return 3;
counter2++;
port1 = 2; //controller 3
port2 = 3; //controller 4
}
bool data1 = interface()->inputPoll(port, Input::Device::Multitap, port1, index);
bool data2 = interface()->inputPoll(port, Input::Device::Multitap, port2, index);
return (data2 << 1) | (data1 << 0);
}
