| 摘要 |
PURPOSE:To perform easy and secure verfication by accepting and processing an optional microprogram steal request at a program address. CONSTITUTION:When the microprogram of a basic processor is executed up to a prescribed address in a muP address register 2, a comparing circuit 9 obtains an address coincidence to generate an output signal 28 of ''1''. Therefore, an OR signal 31 is held at ''1'' to open an AND circuit 12, and a muP steal request signal SO inhibited so far is accepted by an execution order control circuit 1. Then, an address for processing the signal SO is generated by the circuit 1 and set in the register 2, thereby handling a corresponding microprogram steal request. |
