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1. 发明授权

US4546430A Control unit busy queuing 失效
标题翻译：控制单元忙排队
公开(公告)号：US4546430A
公开(公告)日：1985-10-08
申请号：US513051
申请日：1983-07-13
申请人： David J. Moore , Larry L. Byers , Duane G. Kurth , Donald T. Bordsen , John R. Honkomp , Bruce C. Todd , Robert M. Malek
发明人： David J. Moore , Larry L. Byers , Duane G. Kurth , Donald T. Bordsen , John R. Honkomp , Bruce C. Todd , Robert M. Malek
IPC分类号： G06F13/10 , G06F13/12 , G06F13/20 , G06F3/00
CPC分类号： G06F13/20 , G06F13/122
摘要： In a system wherein a central computer complex is connected through central control modules (CCM) and channel modules (CM) to the control units of peripheral subsystems, a first queue is maintained in a CCM for Start I/O Fast (SIOF) commands waiting to be accepted by the CMs connected thereto. After a CM accepts an SIOF command and passes it on to a control unit, the control unit may return to the CM a busy status which is then passed through to the CCM. The CCM maintains a control unit busy (CUB) queue and an entry is made therein when busy status is returned. When a control unit reports control unit end status to the CCM, the CUB queue is linked to the top of the SIOF so that the CMs may again be informed that the SIOF commands are available. The arrangement avoids two interruptions of the central computer complex to report first that the control unit is busy and then that the control unit is available.
摘要翻译：在中央计算机复合体通过中央控制模块（CCM）和信道模块（CM）连接到外围子系统的控制单元的系统中，第一个队列保持在用于启动I / O快速（SIOF）命令等待的CCM中被连接到其的CM接受。在CM接收到SIOF命令并将其传递给控制单元之后，控制单元可以将CM返回到繁忙状态，然后将其传递给CCM。当忙碌状态返回时，CCM维护一个控制单元忙（CUB）队列并进入其中。当控制单元将控制单元的结束状态报告给CCM时，CUB队列被链接到SIOF的顶部，使得CM再次被通知SIOF命令可用。该装置避免中央计算机复合体的两次中断，首先报告控制单元正忙，然后控制单元可用。

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