| 摘要 |
PURPOSE:To clarify history and step of a change of a routine, by storing an operated routine of a program in a memory, and reading out data in its memory. CONSTITUTION:An operation decoding circuit 70 is connected to an output of an operation register 50 for inputting and latching a readout signal of a control memory 40 storing a microprogram, decodes a readout microprogram, and discriminates whether there is a change in a routine or not. Subsequently, an address generating circuit 80 receives an output of the circuit 70, and changes an address. Also, this device is provided with a monitoring memory 90 which receives a microprogram address input data of the memory 40, as write data, and stores only the head microprogram address input data for changing the routine, in an address designated by output data of the circuit 80. In this way, the history of operation of the microprogram is recorded. |
