Boots – shoes – and leggings
Patent
1989-05-10
1994-01-04
Lee, Thomas C.
Boots, shoes, and leggings
395250, 395500, 364DIG1, 3642601, 3642705, 364271, G06F 1338, G06F 1310
Patent
active
052768147
ABSTRACT:
In a data processing system, an input output bus unit (IOBU) is connected one end of an input output interface controller (IOIC) via an asynchronous bus. The other end of the IOIC is connected to a storage controller (SC) and an input output interface unit (IOIU) via a synchronous bus. The SC and IOIU are connected to a memory unit and an instruction processing unit. The asynchronous bus, which is comprised of three sub-buses and a control bus, conducts signals between the IOIC and an IOBU in an asynchronous handshaking manner. The synchronous bus, which is comprised of two sub-buses and a control bus, conducts signals between the IOIC and the SC/IOIU in an synchronous manner. The IOIC, interconnected between the synchronous bus and asynchronous bus, functions as a buffer between the faster synchronous bus and the slower asynchronous bus. Various operations are performed between an IOBU and the memory unit via the asynchronous bus, IOIC, synchronous bus, message acceptance operation.
REFERENCES:
patent: 4442504 (1984-04-01), Dummermuth
patent: 4570220 (1986-02-01), Tetrick et al.
Communication from EPO, dated Apr. 6, 1991, Application No. 87109388.6, for International Business Machines Search Report, 4 pages, EP87 10 9388.
IBM Technical Disclosure Bulletin, vol. 26, No. 10B, Mar. 1984, Bourke et al., IBM Series/1 Channel Attachment . . .
Bourke Donall G.
Chisholm Douglas R.
Float Gregory D.
Kelley Richard A.
Liu Roy Y.
International Business Machines - Corporation
Lee Thomas C.
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