Showing papers on "Handshake published in 1984"

Control method of data transfer

Abstract: Transfer of data can be controlled by connecting operation modules, which share a single-circuit data bus line, together by a single-circuit handshake line, allocating the timing of use of the data bus line by time-division techniques in synchronization with a handshake clock when sending out and accepting data among the operation modules, and forming a gate circuit via the handshake line between two of the operation modules, whereby to detect coincidence of a data send ready state and a data accept ready state in the two of the operation modules. The above controlling method permits use of fewer control line, simple pipeline processing, shorter standing time, etc.

Virtual cmputer system

Abstract: PURPOSE:To facilitate an OS handshake, by providing a special machine language instruction equipped with a prescribed field for the purpose of supporting the OS handshake. CONSTITUTION:An instruction decoding mechanism 1, a handshake mechanism 2, a handshake control table 3, an OS switching mechanism 4, and a mode FF5 are provided. For the purpose of supporting the OS handshake, a special machine language instruction (instruction HSS) is provided. This instruction HSS is equipped with a field OP, which has a value indicating that the instruction is the instruction HSS, as the instruction code part and has a field ID, which indicates a function to be handshaked by a master OS, as an operand. The system is constituted in this manner to facilitate the OS handshake.