磁条卡解码芯片Ｍ２２０的底层驱动汇编程序，采用的查询方式-Magnetic stripe card decoder chip M220 underlying driver compilation procedures, used in query

是磁条读写器的主芯片程序，单片机51系列 用汇编语言编写-Magnetic stripe reader is the main chip procedures, single-chip microcomputer 51 with the compilation of languages