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Adds a couple of joystick inputs.

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SG1000 titles all seem to work now.
This commit is contained in:
Thomas Harte 2018-09-23 21:55:07 -04:00
parent 2253341904
commit 5b9e7213dd
1 changed files with 70 additions and 18 deletions

88
Machines/MasterSystem/MasterSystem.cpp

@ -29,10 +29,50 @@ const int sn76489_divider = 2;
namespace Sega {
namespace MasterSystem {
class Joystick: public Inputs::ConcreteJoystick {
public:
Joystick() :
ConcreteJoystick({
Input(Input::Up),
Input(Input::Down),
Input(Input::Left),
Input(Input::Right),
Input(Input::Fire, 0),
Input(Input::Fire, 1)
}) {}
void did_set_input(const Input &digital_input, bool is_active) override {
switch(digital_input.type) {
default: return;
case Input::Up: if(is_active) state_ &= ~0x01; else state_ |= 0x01; break;
case Input::Down: if(is_active) state_ &= ~0x02; else state_ |= 0x02; break;
case Input::Left: if(is_active) state_ &= ~0x04; else state_ |= 0x04; break;
case Input::Right: if(is_active) state_ &= ~0x08; else state_ |= 0x08; break;
case Input::Fire:
switch(digital_input.info.control.index) {
default: break;
case 0: if(is_active) state_ &= ~0x10; else state_ |= 0x10; break;
case 1: if(is_active) state_ &= ~0x20; else state_ |= 0x20; break;
}
break;
}
}
uint8_t get_state() {
return state_;
}
private:
uint8_t state_ = 0xff;
};
class ConcreteMachine:
public Machine,
public CPU::Z80::BusHandler,
public CRTMachine::Machine {
public CRTMachine::Machine,
public JoystickMachine::Machine {
public:
ConcreteMachine(const Analyser::Static::Sega::Target &target, const ROMMachine::ROMFetcher &rom_fetcher) :
@ -42,6 +82,11 @@ class ConcreteMachine:
speaker_.set_input_rate(3579545.0f / static_cast<float>(sn76489_divider));
set_clock_rate(3579545);
// Instantiate the joysticks.
joysticks_.emplace_back(new Joystick);
joysticks_.emplace_back(new Joystick);
// Clear the memory map.
for(auto &pointer: read_pointers_) {
pointer = nullptr;
}
@ -116,15 +161,15 @@ class ConcreteMachine:
case CPU::Z80::PartialMachineCycle::Input:
switch(address & 0xc1) {
case 0x00:
printf("TODO: memory control\n");
printf("TODO: [input] memory control\n");
*cycle.value = 0xff;
break;
case 0x01:
printf("TODO: I/O port control\n");
printf("TODO: [input] I/O port control\n");
*cycle.value = 0xff;
break;
case 0x40: case 0x41:
printf("TODO: get current line\n");
printf("TODO: [input] get current line\n");
*cycle.value = 0xff;
break;
case 0x80: case 0x81:
@ -133,17 +178,18 @@ class ConcreteMachine:
z80_.set_interrupt_line(vdp_->get_interrupt_line());
time_until_interrupt_ = vdp_->get_time_until_interrupt();
break;
case 0xc0:
printf("TODO: I/O port A/N\n");
*cycle.value = 0;
break;
case 0xc1:
printf("TODO: I/O port B/misc\n");
*cycle.value = 0;
break;
case 0xc0: {
Joystick *const joypad1 = static_cast<Joystick *>(joysticks_[0].get());
Joystick *const joypad2 = static_cast<Joystick *>(joysticks_[1].get());
*cycle.value = static_cast<uint8_t>(joypad1->get_state() | (joypad2->get_state() << 6));
} break;
case 0xc1: {
Joystick *const joypad2 = static_cast<Joystick *>(joysticks_[1].get());
*cycle.value = (joypad2->get_state() >> 2) | 0xf;
} break;
default:
printf("Clearly some sort of typo\n");
printf("[input] Clearly some sort of typo\n");
break;
}
break;
@ -151,10 +197,10 @@ class ConcreteMachine:
case CPU::Z80::PartialMachineCycle::Output:
switch(address & 0xc1) {
case 0x00:
printf("TODO: memory control\n");
printf("TODO: [output] memory control\n");
break;
case 0x01:
printf("TODO: I/O port control\n");
printf("TODO: [output] I/O port control\n");
break;
case 0x40: case 0x41:
update_audio();
@ -167,14 +213,14 @@ class ConcreteMachine:
time_until_interrupt_ = vdp_->get_time_until_interrupt();
break;
case 0xc0:
printf("TODO: I/O port A/N\n");
// printf("TODO: [output] I/O port A/N [%02x]\n", *cycle.value);
break;
case 0xc1:
printf("TODO: I/O port B/misc\n");
printf("TODO: [output] I/O port B/misc\n");
break;
default:
printf("Clearly some sort of typo\n");
printf("[output] Clearly some sort of typo\n");
break;
}
break;
@ -203,6 +249,10 @@ class ConcreteMachine:
audio_queue_.perform();
}
std::vector<std::unique_ptr<Inputs::Joystick>> &get_joysticks() override {
return joysticks_;
}
private:
inline void update_audio() {
speaker_.run_for(audio_queue_, time_since_sn76489_update_.divide_cycles(Cycles(sn76489_divider)));
@ -218,6 +268,8 @@ class ConcreteMachine:
TI::SN76489 sn76489_;
Outputs::Speaker::LowpassSpeaker<TI::SN76489> speaker_;
std::vector<std::unique_ptr<Inputs::Joystick>> joysticks_;
HalfCycles time_since_vdp_update_;
HalfCycles time_since_sn76489_update_;
HalfCycles time_until_interrupt_;