Function DetectDrive

Kernel/src/storage/ata.cpp:52–92

	int DetectDrive(int port, int drive){
		WriteRegister(port, ATA_REGISTER_DRIVE_HEAD, 0xa0 | (drive << 4)); // Drive

		for(int i = 0; i < 4; i++) inportb(controlPort0);

		WriteRegister(port, ATA_REGISTER_SECTOR_COUNT, 0);
		WriteRegister(port, ATA_REGISTER_LBA_LOW, 0);
		WriteRegister(port, ATA_REGISTER_LBA_MID, 0);
		WriteRegister(port, ATA_REGISTER_LBA_HIGH, 0);

		WriteRegister(port, ATA_REGISTER_COMMAND, ATA_CMD_IDENTIFY); // Identify

		Timer::Wait(1);

		if(!ReadRegister(port, ATA_REGISTER_STATUS)){
			return 0;
		}
		
		{
			int timer = 0xFFFFFF;
			while(timer--){
				uint8_t status = ReadRegister(port, ATA_REGISTER_STATUS);
				if(status & ATA_DEV_ERR) {
					return 0;
				}
				if(!(status & ATA_DEV_BUSY) && status & ATA_DEV_DRQ) goto c1;
			}
			return 0;
		}

	c1:
		if(ReadRegister(port, ATA_REGISTER_LBA_MID) || ReadRegister(port, ATA_REGISTER_LBA_HIGH)) return 0;

		int timer2 = 0xFFFFFF;
		while(timer2--){
			uint8_t status = ReadRegister(port, ATA_REGISTER_STATUS);
			if((status & ATA_DEV_ERR)) return 0;
			if((status & ATA_DEV_DRQ)) return 1;
		}
		return 0;
	}

	void IRQHandler(regs64_t* r){
		Log::Info("Disk IRQ");