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51. 发明专利

JPS63128461A BUS CONTROL DEVICE 失效
公开(公告)号：JPS63128461A
公开(公告)日：1988-06-01
申请号：JP27407986
申请日：1986-11-19
申请人： HITACHI LTD , HITACHI PROCESS COMPUTER ENG
发明人： SASAKI WATARU , YAMAOKA HIROMASA , AMAHI YASUHIRO , SAITOU SUMIHISA , YOKOTA TAKAHIRO
IPC分类号： G06F13/36 , G06F9/52 , G06F15/16 , G06F15/177
摘要： PURPOSE:To improve the throughput of a bus control device by providing a bus occupation time monitor circuit to each bus master to discriminate a case where an access is given to a bus slave within its own processor from a case where an access is given to the bus slave within another processor via a bus extending device. CONSTITUTION:The relation Tb>Ta+Tc is satisfied where Ta shows the bus occupation monitor time set when accesses are given to bus slaves set on the same bus together with Tb showing the bus occupation monitor time set in case accesses are given to bus slaves set on other buses, and Tc showing the maximum time needed for delivery of a bus using request through acquisition of the bus using right respectively. Then the bus occupation monitor time is equal to Tb when a bus master 13 occupies a bus 11 to give an access to a bus slave 24. If a bus master 23 gives an access to an unpackaged area under such conditions, the time during which the master 23 occupies a bus 21 is equal to Ta. Thus the master 23 releases the bus 21 earlier than a fact that the master 13 releases the bus 11 since Tb>Ta is satisfied. As a result, the master 13 also acquires the using right of the bus 21 and can give an access to the slave 24.

52. 发明专利

JPS634339A TASK CONTROL SYSTEM 失效
公开(公告)号：JPS634339A
公开(公告)日：1988-01-09
申请号：JP14713386
申请日：1986-06-25
申请人： HITACHI LTD
发明人： SASAKI WATARU , SAITOU SUMIHISA , AMAHI YASUHIRO , SHIMOYAMA KAZUHIKO
IPC分类号： G05B9/02 , G06F9/06 , G06F9/46 , G06F9/48 , G06F11/00
摘要： PURPOSE:To stop even other tasks in the same group when one task stops by controlling the group relation of tasks in the relation of the simultaneous stop. CONSTITUTION:A device consists of control tasks 21-25 which main machines 21W-26W and given task numbers #1-#6 corresponding to respective the main machines, a task control table 20 which contains group classifications of mutual relations of the respective tasks 21-26, and an OS 7 which controls the respective tasks 21-26. The task control table 20 assign the same digit bit positions of respective task group flags to the same task group and stores '1' at the same digit bit positions of task groups flags of tasks which are so related to stop at the same time when one task stops. The OS 7 inputs the task number of the task where an error occurs and also inputs the task group of the task where the error occurs, thereby stopping the respective tasks in the task group.

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