| 摘要 |
<p>PURPOSE:To reduce software overhead by sending a standard time through a loop circuit, judging whether it is within an error range allowed to the information processing system by each service processor, and regulating. CONSTITUTION:When real time T3 of a service processor SVP 2 is faster than real time T2 of an SVP 1, renewal inhibition instruction of a real time timer 21 is given from a comparator circuit 216 to a renewal controlling circuit 201 through a signal line 300 and storing of the result of subtraction of a subtracter circuit 208 is instructed to a controlling circuit 217 through a signal line 301, and the result of subtraction (T3-T2) is stored in a register 210. The value in the register 210 is subtracted by a subtractor circuit 211 1 by 1 in synchronizing with timer renewal clock. When the value of the register is reduced to 0, renewal start instruction of the real time timer 21 is given from an all-0 detecting circuit 212 to the renewal controlling circuit 201 through a signal line 302. At the same time, the renewal of the register 201 is stopped.</p> |
