INTERFACE DEVICE FOR HOLDING THE SYSTEM DATA IN COMMON

摘要

An interface device for a data sharing between systems which have different bus structures is disclosed. In the interface device, a multiplexor(1) receives addresses generated by first and second systems and selectively outputs one address. A shared memory(2) is accessed by the first or second systems according to the address from the multiplexor(1). A control selecting means(3) receives the control signal from the first and second systems and controls the multiplexor(1) and shared memory(2) in response thereto. An interrupt processor(4) processes an interrupt generated by the first and second systems according to the control signal of the control selecting means(3). A buffer(5) performs data input/output from the shared memory(2) according to the control of the control selecting means(2).