CIRCUIT CONTROL DEVICE

PURPOSE:To reduce the number of microinstructions required for the formation of a control word and to shorten a command execution processing time and a circuit processing time by providing a control word constitution part and a microinstruction for the formation of control words. CONSTITUTION:An instruction N is read out from a control storage part storing a microprogram by a microprocessor 1. An address in an address field of the instruction N is supplied to a memory 10 in the control word constitution part 9. The contents of a control word specification field specifying the kinds of trigger code obtained from the memory 10 and a control word in the instruction N and the contents of a register 13 are simultaneously stored in a bus buffer register of a bus control circuit 2 through a selecting circuit 11 to form a control word consisting of 32 bits.