Boots – shoes – and leggings
Patent
1983-07-18
1984-11-13
Zache, Raulfe B.
Boots, shoes, and leggings
G06F 1300
Patent
active
044829825
ABSTRACT:
A data processing system includes a central processing unit, a main memory, and a communication subsystem servicing a number of communication lines. The communication subsystem includes a free running timer, a line microprocessor for communicating with the communication lines and a shared memory, and an I/O microprocessor for communicating with the shared memory and the central processing unit and main memory. The line microprocessor, desiring to communicate with a specified communication line after a predetermined time delay, loads a first mailbox in shared memory with a binary number indicative of the predetermined time delay. The I/O microprocessor adds the output of the free running timer to the binary number, stores the result in a location in a random access memory, and periodically compares the result against the free running timer output. The I/O microprocessor loads a second mailbox with a control character when the results of the comparison indicate that the predetermined time delay is accomplished. The line microprocessor responds to the information in the second mailbox to communicate with the specified communication line.
REFERENCES:
patent: 3408629 (1968-10-01), Haselwood
patent: 3633181 (1972-01-01), Sikorsky
patent: 4090239 (1978-05-01), Twibell et al.
patent: 4133030 (1979-01-01), Huettner et al.
patent: 4220990 (1980-09-01), Alles
Goss Gary J.
Yu Kin C.
Eng David Y.
Grayson George
Honeywell Information Systems Inc.
Prasinos Nicholas
Zache Raulfe B.
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