Buffer shared device of printer

The utility model relates to a buffer shared device of a printer, which belongs to an external device of a computer. The utility model comprises a microprocessor (CPU) 1, a read only memory 2, an RAM 3, an interface circuit 4 for the output of a printer, and 5 host interface circuits. The utility model can reliably realize that a plurality of microcomputers with different types jointly use one printer. The buffer shared device of a printer enhances the use rate of a computer, and saves a large quantity of equipment cost simultaneously.