此代码是用于computer 与89C51单片机进行数据通信传输的-this code is used for computer and 89C51 beging data commoning trans

用51单片机和magtek实现磁卡三个磁道的解码，并读取磁卡的数据，输出到串口。-With 51 single-chip microcomputer and magtek swipe CARDS three track of decoding, and reads the file data, output to the serial port.