C++ (Cpp) cache_mmio_read示例

示例#1

文件： mmio.cpp 项目： LuigiBlood/bsnes-plus

uint8 SuperFX::mmio_read(unsigned addr) {
  if(!Memory::debugger_access())
    cpu.synchronize_coprocessor();

  if(addr >= 0x3100 && addr <= 0x32ff) {
    return cache_mmio_read(addr - 0x3100);
  }

  if(addr >= 0x3000 && addr <= 0x301f) {
    return regs.r[(addr >> 1) & 15] >> ((addr & 1) << 3);
  }

  switch(addr) {
    case 0x3030: {
      return regs.sfr >> 0;
    }

    case 0x3031: {
      uint8 r = regs.sfr >> 8;
      if(!Memory::debugger_access()) {
        regs.sfr.irq = 0;
        cpu.regs.irq = 0;
      }
      return r;
    }

    case 0x3034: {
      return regs.pbr;
    }

    case 0x3036: {
      return regs.rombr;
    }

    case 0x303b: {
      return regs.vcr;
    }

    case 0x303c: {
      return regs.rambr;
    }

    case 0x303e: {
      return regs.cbr >> 0;
    }

    case 0x303f: {
      return regs.cbr >> 8;
    }
  }

  return 0x00;
}

示例#2

文件： mmio.cpp 项目： BadyRaty/Mednafen-Core

uint8 SuperFX::mmio_read(unsigned addr) {
  scheduler.sync_cpucop();
  addr &= 0xffff;

  if(addr >= 0x3100 && addr <= 0x32ff) {
    return cache_mmio_read(addr - 0x3100);
  }

  if(addr >= 0x3000 && addr <= 0x301f) {
    return regs.r[(addr >> 1) & 15] >> ((addr & 1) << 3);
  }

  switch(addr) {
    case 0x3030: {
      return regs.sfr >> 0;
    }

    case 0x3031: {
      uint8 r = regs.sfr >> 8;
      regs.sfr.irq = 0;
      cpu.regs.irq = 0;
      return r;
    }

    case 0x3034: {
      return regs.pbr;
    }

    case 0x3036: {
      return regs.rombr;
    }

    case 0x303b: {
      return regs.vcr;
    }

    case 0x303c: {
      return regs.rambr;
    }

    case 0x303e: {
      return regs.cbr >> 0;
    }

    case 0x303f: {
      return regs.cbr >> 8;
    }
  }

  return 0x00;
}