Data input and output controller

Details Data input and output controller Data input and output controller

1975-10-28

1977-11-29

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 300

Patent

active

040608492

ABSTRACT:
There is disclosed an input/output controller for an information processing system comprising a main memory, a central processing unit, a peripheral controller and a plurality of peripheral units coupled to the central processing unit. In particular, the input/output controller comprises a plurality of physical channels disposed between the peripheral controller and the central processing unit, a plurality of logical channels for transmitting information with the central processing unit, and each uniquely associated with one of the peripheral units. The main memory stores a first table including a physical channel entry containing informaton relative to the plurality of physical channels and a second table including a logical channel entry containing information relative to the plurality of peripheral units. Further, there is included means for storing a channel control program to be executed by the input/output control system for selectively transferring data between the main memory and the peripheral controller by first connecting the input/output control system to a logical channel entry and placing the identified logical channel table into the means for storing for a subsequent execution.

REFERENCES:
patent: 3725864 (1973-04-01), Clark et al.
patent: 3848233 (1974-11-01), Lotan et al.
Grant et al., "Priority Interrupt Queuing," IBM T.D.B., vol. 15, No. 10, . 1973, pp. 3046-3048.
Iskiyan et al., "Microprogram Arrangements," IBM T.D.B., vol. 13, No. 8, Jan. 1971, pp. 2363-2365.
Edel, "Intelligent Input/Output Interrupt Processing," IBM T.D.B., vol. 17, No. 7, Dec. 1974, pp. 1915-1916.

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