INTERFACE SYSTEM FOR COPROCESSOR

摘要

PURPOSE:To speed up operation speed by providing an FIFO (First In First Out) in the interface part of a coprocessor, and making the acceptance of statement in the coprocessor into a pipe line. CONSTITUTION:An FPU (Floating point Processing Unit) 101 is provided with a FIFO to fetch the DATA of a data bus 105 related to a command or an operand, and the FPU101 operates on receiving signals AT2-AT0 to indicate the kind of an access from a CPU100 and execute a coprocessor protocol by returning the signals CPST2-CPST0 to the CPU100. Thus, since a command pipe line is possible, the overhead of the interface in the floating point operation can be reduced, and the operation speed can be speeded up.