| 摘要 |
PURPOSE:To reduce capacity of a controlling and storing circuit, and also to decrease the number of steps of a microprogram, by providing plural adding machines so that plural increment addresses can be obtained. CONSTITUTION:A micro-instruction to be executed is read out of a controlling and storing circuit 1, is stored in an instruction register 10, and simultaneously, the respective inputs are stored in increment registers 4, 5 and present address registers 6, 7. As a result, an address of the micro-instruction stored in the register 10 is stored in the registers 6, 7, and that which adds ''1'' to said address through adding machines 2, 3 is stored in the registers 4, 5. Subsequently, the micro-instruction stored in the register 10 is executed, and a control circuit 11 is controlled by a field of plural increment type instructions instead of an increment type instruction. By a generating operation of such a next address, the object can be attained. |
