| 摘要 |
PURPOSE:To decrease the total number of instructions, by installing a decoder selection register that sotres the value showing the decoder circuit group to be selected. CONSTITUTION:Instruction decoder circuit groups 61-6n are installed along with a decoder selection register 10 and a selected register decoder 11. Thus outputs b1- bn of the groups 61-6n are prepared for an instruction code, and the control signals can be produced to execute (n) units of different instructions. |
