And then, the model of the BootLoader is brought forward, which is composed of Boot, Loader, Upgrade. The model includes these projects, such as serial Port, hard disk, CDROM, internet, USB disk.

• 接着描述了该BootLoader的模型,主要由Boot、Loader、Upgrade三大模块组成,并由串口、硬盘、CDROM、网络、U盘等方案构成。