| 摘要 |
PURPOSE:To completely eliminate the load related to the start address of a program by setting a switch in response to the execution start address of the program so that a CPU is carried out by the execution start address of the program that is optionally set. CONSTITUTION:A CPU 2' reads an instruction out of an address decided unequivocally after a reset signal 11' is released. In this case, however, a read synchronizing signal 23' sent from the CPU 2' is gated and blocked by a reas synchronizing signal inhibiting circuit 4 together with no output of a read synchronizing signal 231 and no data is sent to a data line 22'. Then a jump instruction transmitting circuit 6 transmits a jump instruction containing a primary jumping destination address set by a switch circuit 5 and synchronously with the signal 23'. Then the circuit 4 releases the gate/block state of the signal 23'. The CPU 2' supplies the jump instruction and the control is shifted to an address set by the circuit 5.
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