G - Physics – 06 – F
Patent
G - Physics
06
F
340/84
G06F 3/00 (2006.01) G06F 13/22 (2006.01) G06F 13/26 (2006.01) G06F 13/40 (2006.01)
Patent
CA 1057861
ABSTRACT OF THE DISCLOSURE An input/output processing system includes a plurality of active modules, a plurality of passive modules, at least one memory module and a system interface unit having a plurality of ports, each of which connect to a different one of the modules. The active modules include an input/ output processing unit which processes interrupts and executes command sequences and a multiplexer unit which directly controls transfers between the memory module and any one of the peripheral devices coupled to different ones of a plurality of ports of the multiplexer unit. The system interface unit which operatively provides connections between the different modules includes apparatus for generating steering codes defining the physical location of each module requiring service by another module of the system. The system interface unit appends information provided by the particular module generating a request for attention to the steering code generated. The generation of steering code information by the system interface unit and the module included in such requests insures that only authorized accesses are made to the different modules during the input/output process- ing unit's execution of programs during the running of processes associated therewith.
244790
Monahan Earnest M.
Patterson Garvin W.
Shelly William A.
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