Boots – shoes – and leggings
Patent
1976-12-30
1978-05-16
Springborn, Harvey E.
Boots, shoes, and leggings
G06F 918
Patent
active
040902390
ABSTRACT:
An input/output system includes a plurality of modules and a system interface unit having a plurality of ports, each of which connects to a different one of the modules. The plurality of modules includes at least one processor and one memory module. The system interface unit includes a timer unit and a priority network for processing processor interrupt requests on a priority basis. The priority network connects to a register for storing coded priority level signals to be assigned to the different types of interrupt requests. The register is conditioned to store a low priority level for timer interrupts. The timer unit includes a preset register, an interval counter and a rollover counter. At the completion of each time interval, the interval counter is loaded automatically from the preset register and counting is continued. Simultaneously, the interval counter conditions the rollover counter to store a count registering the total number of completed intervals counted. The processor responds to a timer interrupt request by a special command which can only selectively clear the rollover counter to ZEROS when the interval counter is not in the process of completing another interval.
REFERENCES:
patent: 3333252 (1967-07-01), Shimabukuro
patent: 3568157 (1971-03-01), Downing et al.
patent: 3599162 (1971-08-01), Byrns et al.
patent: 3831151 (1974-08-01), Jones, Jr. et al.
patent: 3964054 (1976-06-01), Annumziata et al.
patent: 3988719 (1976-10-01), Whitby et al.
Calle Jaime
Griswold Victor Michael
Twibell Jerome J.
Driscoll Faith F.
Honeywell Information Systems Inc.
Prasinos Nicholas
Reiling Ronald T.
Springborn Harvey E.
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