| 摘要 |
PURPOSE:To improve the processing efficiency of the system by providing a control storage read circuit activated independently of the circuit being subject to the control storage circuit so as to improve the diagnostic performance of the controller after address information from a CPU is received. CONSTITUTION:A host buffer 210 receives address information from the CPU100, records it and informs it to a control storage read circuit 250 via a lead 211. Then the circuit 250 disconnects a microprocessor 220 governing a control storage device 230 via a lead 251. Then the circuit 250 activates a lead 252, causing the address information stored in the host buffer register 210 to be outputted to a line 213 via a line 212, resulting that the device 230 is subjected to the circuit 250. Then the address information is fed to a register 210 via leads 231, 232, 234 and returned to the CPU100 via a lead 214. |
