Boots – shoes – and leggings
Patent
1976-01-09
1978-07-11
Thomas, James D.
Boots, shoes, and leggings
G06F 300, G06F 504
Patent
active
041006011
ABSTRACT:
A distributed input/output system is disclosed for controlling numerous peripheral devices and the transfer of data signals and control signals between those devices and a general purpose digital computer. The control system described includes a multiplexer which can accommodate as many as eight input/output devices under the control of separate programmable microcoded peripheral-unit controllers. Each controller is adapted to be located at or on an individual peripheral device and each is connected to the multiplexer by an identical ribbon cable that is employed to cary both signals and power. Each controller employs a substantially identical microengine, that is, a microcoded processor, currently of five integrated circuit chips. The peripheral-unit controllers may be configured somewhat differently depending upon whether the peripheral device utilizes data signals in parallel or in series. Data may be transferred directly between a computer memory unit and the peripheral devices without requiring the use of any computer working registers and without requiring subroutines to preserve an ongoing main program. Each peripheral-device controller can issue interrupt signals which are processed by the computer on a priority basis when they occur simultaneously. Some microengines employ two sets of programmed microcodes and each set is selectable by a switch, such as a wire jumper, for controlling either of two different kinds of devices.
The multiplexer of this invention includes circuits for forcing the truth value of a selected data signal to a predetermined level and for recognizing a particular data term for terminating data transfer operations. These capabilities are especially useful for data signals that include a parity bit and for data signals that represent an alphanumeric character.
REFERENCES:
patent: 3311889 (1967-03-01), Birmingham
patent: 3560937 (1971-02-01), Fischer
patent: 3618037 (1971-11-01), Wollum
patent: 3673576 (1972-06-01), Donaldson, Jr.
patent: 3699525 (1972-10-01), Klavins
patent: 3825905 (1974-07-01), Allen, Jr.
patent: 3828325 (1974-08-01), Stafford
patent: 3842405 (1974-10-01), Key
IBM Technical Disclosure Bulletin, "Communication Line Microcontroller," vol. 14, No. 6, Nov. 1971, pp. 1879-1882.
Computer Design, "Interfacing Peripherals in Mixed Systems," Apr. 1975, pp. 77-84.
Kaufman Phillip A.
Washburn Jerry R.
Computer Automation, Inc.
Lawlor Reed C.
Thomas James D.
LandOfFree
Multiplexer for a distributed input/out controller system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiplexer for a distributed input/out controller system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiplexer for a distributed input/out controller system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-266467