| 摘要 |
PURPOSE:To make it possible to resume sequence always from an initial state by initializing an address storing area by an initializing means when starting the sequence and obtaining the initialized address by an address inducing means. CONSTITUTION:A stack initializing section 2 initializes stack 1 and generates a starting signal 11 according to a starting signal 10 generated by resetting etc. On receiving this starting signal 11, a pre-arithmetic section 3 performs the first arithmetic processing and then generates a starting signal 12 and a pop-up section 4 pops up the stack 1. However, as the stack 1 is empty at this time, fixed address is selected and a starting signal 13 is generated. By this starting signal 13, a rear end arithmetic section 5 performs the second arithmetic processing and then generates a starting signal 14. A pushdown section 6 pushes down an address that makes the pop-up section 4 generate a starting signal 16 to the stack 1 as a signal 9 and generates a starting signal 15. By this starting signal 15, the pre-arithmetic section 3 performs the first arithmetic processing again. |
