公开(公告)号：US3713109A

公开(公告)日：1973-01-23

申请号：US3713109D

申请日：1970-12-30

Applicant: IBM

Inventor： HORNUNG L

IPC: G06F13/26 ,  G06F3/00

CPC classification number: G06F13/26

Abstract: A technique of I/O control in which an I/O instruction contains a three-bit working device code (WDC) which is used to table lookup the actual device code (ADC) of the device to be serviced. The ADC is transmitted to all of the devices which then compare the code with their wired-in codes and the addressed device then stores the WCD which is simultaneously transmitted. During interrupt requests the WDC stored in the devices is decoded and used to select one of eight interrupt request lines. The eight interrupt request lines are applied to a matrix which determines which of the eight is of highest order priority. The output of the matrix is encoded to provide a WDC corresponding to the device of highest order priority and transmitted to all of the devices to identify the device which is to hive it''s interrupt request honored. The number of ADC''s may be greater than the number of WDC''s allowing for the attachment of a number of devices in excess of the size of the matrix and likewise in excess of other facilities in the I/O adapter. Further, provision is made for the attachment of devices which may be identical in all respects including wired-in codes for identifying the devices.

Abstract translation: 一种I / O控制技术，其中I / O指令包含三位工作设备代码（WDC），用于表查找待维护设备的实际设备代码（ADC）。 ADC传输到所有的设备，然后将其与其接入代码进行比较，并且所寻址的设备然后存储同时发送的WCD。 在中断请求期间，存储在设备中的WDC被解码并用于选择八个中断请求行之一。 八个中断请求线被应用于矩阵，其确定八个中的哪一个是最高优先级的。 矩阵的输出被编码以提供对应于最高优先级的设备的WDC，并被发送到所有设备以识别要被保护的中断请求的设备。 ADC的数量可能大于WDC的数量，允许多个设备的连接超过矩阵的大小，同样超过了I / O适配器中的其他设施。 此外，还提供了在所有方面可以相同的设备的附接，包括用于识别设备的接入代码。

公开(公告)号：CA932285A

公开(公告)日：1973-08-21

申请号：CA115876

申请日：1971-06-17

Applicant: IBM

Inventor： DAVIS W ,  TANNER H ,  HORNUNG L ,  LINDSEY R

IPC: B41J19/64

Abstract: A system for determining and entering line measure into a justification computer for controlling the format of output copy. During an output operation when there is a necessity for determining line measure, a measure seek code is detected, escapement of the carrier initiated, the escapement of the carrier sensed, and the units of escapement counted. Upon sensing the location of the right margin stop, escapement is terminated. Thereafter the carrier is returned to the position occupied prior to the measure seek code being read. The number of units counted is the line measure which is then used for control of output.