Apparatus and method for data interface to an input/output...

Details Apparatus and method for data interface to an input/output... Apparatus and method for data interface to an input/output...

H - Electricity

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340/82

H04J 99/00 (2009.01) G06F 13/12 (2006.01) G06F 13/16 (2006.01) G06F 13/40 (2006.01) H04L 5/00 (2006.01) H04Q 11/00 (2006.01)

Patent

CA 1159127

5202835 ABSTRACT In a data processing unit, apparatus is disclosed which permits more than one control interface unit to transfer data to an input/output multiplexer. Thus, more than one central processing unit can have access to a peripheral subsystem. Apparatus is provided which causes the input/output multiplexer to receive sets of data signal groups from the control interface units in sequential order. A signal-free period is provided by the control unit interface between each set of data signal groups (e.g., comprising a single command sequence) which allows the input/output multiplexer to accept waiting data signals from the next sequential control interface unit. Once begun, the transfer of the entire set of data signal groups will pro- ceed without interruption.

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