85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
#include <Core.hpp>
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#include <Scheduler.hpp>
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namespace n64 {
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Core::Core() {
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if(SDL_GameControllerAddMappingsFromFile("resources/gamecontrollerdb.txt") < 0) {
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Util::warn("Failed to load game controller DB");
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}
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}
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void Core::Stop() {
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cpu.Reset();
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cpu.mem.Reset();
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pause = true;
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romLoaded = false;
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}
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void Core::LoadROM(const std::string& rom_) {
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rom = rom_;
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cpu.Reset();
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pause = false;
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romLoaded = true;
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cpu.mem.LoadROM(rom);
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GameDB::match(cpu.mem);
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cpu.mem.mmio.vi.isPal = cpu.mem.IsROMPAL();
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cpu.mem.mmio.si.pif.InitDevices(cpu.mem.saveType);
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cpu.mem.mmio.si.pif.LoadMempak(rom_);
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cpu.mem.mmio.si.pif.LoadEeprom(cpu.mem.saveType, rom_);
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cpu.mem.flash.Load(cpu.mem.saveType, rom_);
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cpu.mem.LoadSRAM(cpu.mem.saveType, rom_);
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cpu.mem.mmio.si.pif.ExecutePIF(cpu.mem, cpu.regs);
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}
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void Core::Run(float volumeL, float volumeR) {
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Mem& mem = cpu.mem;
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MMIO& mmio = mem.mmio;
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Registers& regs = cpu.regs;
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for (int field = 0; field < mmio.vi.numFields; field++) {
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int frameCycles = 0;
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for (int i = 0; i < mmio.vi.numHalflines; i++) {
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mmio.vi.current = (i << 1) + field;
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if ((mmio.vi.current & 0x3FE) == mmio.vi.intr) {
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InterruptRaise(mmio.mi, regs, Interrupt::VI);
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}
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for(; cycles < mem.mmio.vi.cyclesPerHalfline; cycles++, frameCycles++) {
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int taken = cpu.Step();
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static int cpuSteps = 0;
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cpuSteps += taken;
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if(mmio.rsp.spStatus.halt) {
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cpuSteps = 0;
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mmio.rsp.steps = 0;
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} else {
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while(cpuSteps > 2) {
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mmio.rsp.steps += 2;
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cpuSteps -= 3;
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}
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while(mmio.rsp.steps > 0) {
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mmio.rsp.steps--;
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mmio.rsp.Step(regs, mem);
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}
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}
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cycles += taken;
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frameCycles += taken;
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scheduler.tick(taken, mem, regs);
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}
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cycles -= mmio.vi.cyclesPerHalfline;
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}
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if ((mmio.vi.current & 0x3FE) == mmio.vi.intr) {
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InterruptRaise(mmio.mi, regs, Interrupt::VI);
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}
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mmio.ai.Step(cpu.mem, regs, frameCycles, volumeL, volumeR);
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scheduler.tick(frameCycles, mem, regs);
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}
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}
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}
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