本文首先介绍了Windows CE.NET 操作系统的定制,然后详细介绍了基于PXA255和Windows CE.NET 操作系统的嵌入式系统Bootloader 的开发,特别是PXA255 的片上系统 的初始化,该系统用于电能校验仪中,极大的提高了其可操作性。 关键词: Windows CE.NET ;PXA255 ;系统引导程序;存储管理单元 Abstract: This paper introduce the custom of Windows ce.NET firstly, and then introduce the development of Bootloader, especially the initialization of on-chip-system, in Windows ce.net amply. This system is used in checkout equipment electricity, which improve performance sharply. Keywords : Windows CE.NET ;PXA255 ;Bootloader ;MMU