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https://github.com/rodamaral/lsnes.git
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77 lines
2.7 KiB
C++
Executable file
77 lines
2.7 KiB
C++
Executable file
#ifdef CPU_CPP
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//called every 256 clocks; see CPU::add_clocks()
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void CPU::step_auto_joypad_poll() {
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if(vcounter() >= (ppu.overscan() == false ? 225 : 240)) {
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//cache enable state at first iteration
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if(status.auto_joypad_counter == 0) status.auto_joypad_latch = status.auto_joypad_poll;
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status.auto_joypad_active = status.auto_joypad_counter <= 15;
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if(status.auto_joypad_active && status.auto_joypad_latch) {
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if(status.auto_joypad_counter == 0) {
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interface->notifyLatched();
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input.port1->latch(1);
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input.port2->latch(1);
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input.port1->latch(0);
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input.port2->latch(0);
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}
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uint2 port0 = input.port1->data();
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uint2 port1 = input.port2->data();
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if(input.port1->on_clock) input.port1->on_clock();
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if(input.port2->on_clock) input.port2->on_clock();
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status.joy1 = (status.joy1 << 1) | (bool)(port0 & 1);
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status.joy2 = (status.joy2 << 1) | (bool)(port1 & 1);
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status.joy3 = (status.joy3 << 1) | (bool)(port0 & 2);
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status.joy4 = (status.joy4 << 1) | (bool)(port1 & 2);
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}
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status.auto_joypad_counter++;
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}
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}
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//called every 128 clocks; see CPU::add_clocks()
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void CPU::step_auto_joypad_poll_NEW(bool polarity) {
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if(status.auto_joypad_counter > 0 && status.auto_joypad_counter <= 34) {
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if(!status.auto_joypad_latch) {
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//FIXME: Is this right, busy flag goes on even if not enabled???
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if(status.auto_joypad_counter == 1)
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status.auto_joypad_active = true;
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if(status.auto_joypad_counter == 34)
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status.auto_joypad_active = false;
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} else {
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if(status.auto_joypad_counter == 1) {
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status.auto_joypad_active = true;
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interface->notifyLatched();
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input.port1->latch(1);
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input.port2->latch(1);
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}
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if(status.auto_joypad_counter == 3) {
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input.port1->latch(0);
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input.port2->latch(0);
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}
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if((status.auto_joypad_counter & 1) != 0 && status.auto_joypad_counter != 1) {
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uint2 port0 = input.port1->data();
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uint2 port1 = input.port2->data();
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if(input.port1->on_clock) input.port1->on_clock();
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if(input.port2->on_clock) input.port2->on_clock();
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status.joy1 = (status.joy1 << 1) | (bool)(port0 & 1);
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status.joy2 = (status.joy2 << 1) | (bool)(port1 & 1);
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status.joy3 = (status.joy3 << 1) | (bool)(port0 & 2);
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status.joy4 = (status.joy4 << 1) | (bool)(port1 & 2);
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}
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if(status.auto_joypad_counter == 34)
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status.auto_joypad_active = false;
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}
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status.auto_joypad_counter++;
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}
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if(vcounter() >= (ppu.overscan() == false ? 225 : 240) && status.auto_joypad_counter == 0 && !polarity) {
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status.auto_joypad_latch = status.auto_joypad_poll;
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status.auto_joypad_counter = 1;
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}
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}
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#endif
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