Boots – shoes – and leggings
Patent
1977-09-21
1979-05-15
Springborn, Harvey E.
Boots, shoes, and leggings
G06F 300
Patent
active
041551192
ABSTRACT:
A method of addressing memory in a digital computer where a plurality of devices are connected to a single input/output channel to the digital computer communicate with the digital computer by externally specifying the memory address of the data word or words to be transferred to or from the digital computer. More specifically, the invention provides a method for treating the externally specified address coming from one of the multiple devices external to the digital computer as a virtual address. Thus, an input/output process operating in the digital computer may operate within the digital computer's system virtual address space. This method allows input/output processes to be able to utilize the address mapping subsystem of the central processor of the digital computer. The method of memory addressing utilizes a subchannel page table for each one of the multiple devices connected to one input/output channel in addition to a channel page table utilized for each individual input/output channel.
REFERENCES:
patent: 3786427 (1974-01-01), Schmidt et al.
patent: 3909798 (1975-09-01), Wallach
patent: 4060849 (1977-11-01), Bienvenu et al.
De Ward Robert C.
Thurber Kenneth J.
Bauer William D.
Grace Kenneth T.
Sperry Rand Corporation
Springborn Harvey E.
Truax Marshall M.
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