Boots – shoes – and leggings
Patent
1976-12-20
1978-05-23
Thomas, James D.
Boots, shoes, and leggings
2353034, 235304, G06F 1516, G06F 1100
Patent
active
040914550
ABSTRACT:
An input/output processing system comprises a number of modules including at least a pair of processing units connected to operate as a logical pair and a system interface unit having a number of ports. Each port connects to a different one of the modules for interconnecting pairs of modules for communication over a number of switching circuit networks included in the system interface unit. The system interface unit further includes control logic circuits for disconnecting each processor of the logical pair preventing the disconnected processing unit from communicating with other modules. The control logic circuits further include circuits which in response to special commands from a good processor are operative to condition via a special line, circuits in the disconnected processing unit to apply status signals representative of the contents of a control register to the system interface unit. The other circuits within the system interface unit in response to a further command condition certain switching circuit networks for loading the status signals into one of the registers included in the system interface unit for subsequent analysis by system routines.
REFERENCES:
patent: 3557315 (1971-01-01), Kubus
patent: 3641505 (1972-02-01), Artz
patent: 3678467 (1922-07-01), Nussbaum
patent: 3828321 (1974-08-01), Wilber
patent: 3838261 (1974-09-01), Rice
patent: 3864670 (1975-02-01), Inoue
patent: 3898621 (1975-08-01), Zelwski
patent: 3921141 (1975-11-01), Wilber
Monahan Earnest M.
Porter Marion G.
Woods John M.
Driscoll Faith F.
Honeywell Information Systems Inc.
Prasinos Nicholas
Reiling Ronald T.
Thomas James D.
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