at91rm9200双端口RAM驱动及测试程序，支持信号量抢占，支持连续读取及重定位。-at91rm9200 dual-port RAM drive and testing procedures, the volume seize signal support, support for reading and re-positioning.

The DS12887 Real Time Clock plus RAM is designed to be a direct replacement for the DS1287. The DS12887 is identical in form, fit, and function to the DS1287, and has an additional 64 bytes of general purpose RAM. Access to this additional RAM sp