http://www.lupaworld.com/bbs/thread-24699-1-1.html
http://www.ajaxstu.com/Cbiancheng/111732.html
http://www.minigui.org/cgi-bin/lb5000/topic.cgi?forum=28&topic=2020
mmap 和 DMA
http://www.lupaworld.com/bbs/thread-24699-1-1.html
http://www.ajaxstu.com/Cbiancheng/111732.html
http://www.minigui.org/cgi-bin/lb5000/topic.cgi?forum=28&topic=2020
mmap 和 DMA