| 摘要 |
PURPOSE:To control the sharing of input/output devices to simplify software for common control, by giving occupation and release control functions to stations in the multicomputer system where input/output devices are shared. CONSTITUTION:Stations 140 and 141 for occupation and release processings are provided with circuits 342 and 511 where information indicating that the occupation request from another computer 12 is issued to input/output devices P1-P3, which one computer 12 occupies, are stored; and if the occupation request from another computer 12 is issued when input/output devices are occupied by one computer, timings when release requests to occupied input/output devices P1-P3 are issued are reported to all computers C1-C3 connected to a loop bus 15 by one transfer. Consequently, the sharing of input/output devices P1-P3 is controlled without providing a shared memory among computers 12 and its peripheral controlling circuit. |
