| 摘要 |
PURPOSE:To simplify the inter-CPU communication control on a bus by connecting all CPU boards by about two-fold length of respective signal lines of a bus printed wiring board to connect all CPU boards at a uniform distance. CONSTITUTION:A group of plural signal lines 6 having the same length is radially arranged on a bus printed wiring board 5 with a common contact 7 as the center and is connected as processors of a multimicrocomptuer system by a parallel system bus 1. A prescribed number of connector pins 4 arranged in three columns are provided on one CPU board 2 used in this system, and a ground line group 8 is formed correspondingly to signal lines 6. Plural CPU boards 2 are perpendicularly stood along the peripheral edge of the wiring board 5 and are radially arranged, and front ends of signal lines in inner peripheral end parts of respective CPU boards 2 are connected to pinholes at centers of terminals 9a to 9c by through hole plating, and the outside air is sucked and discharged by an air conditioning fan. |
