Boots – shoes – and leggings
Patent
1987-05-15
1990-07-31
Chan, Eddie P.
Boots, shoes, and leggings
3642322, 3642382, 364239, 3642478, G06F 1300, G06F 1516
Patent
active
049454730
ABSTRACT:
A communications controller interface for emulating the previous system employing a plurality of line units in which data is transmitted and received. The interface includes a microprocessor-controlled interface control unit having an interface memory having a plurality of addressable storage locations. The interface memory is mapped by dividing it into a number of groups of locations corresponding to the number of communication lines with each group of locations being subdivided into further locations including a location for storage of receive data, a location for storage of transmit data, and a control location. There are a number of control elements each for generating a sequence of signals for different tasks to be performed by the interface control unit. These control elements are interconnected to the interface control unit and to the interface memory so that the multi-line communications unit is able to access different ones of the control locations for updating the status of the lines and further enabling the microprocessor-controlled interface control unit to transfer data to and from the transmit data and receive data locations of the lines in the predetermined sequence consistent with the status.
REFERENCES:
patent: 3651482 (1972-03-01), Benson et al.
patent: 4433378 (1984-02-01), Leger
patent: 4482982 (1984-11-01), Yu
patent: 4488231 (1984-12-01), Yu
patent: 4546429 (1985-10-01), Chan et al.
patent: 4628446 (1986-12-01), Hoffner, II.
patent: 4724520 (1988-02-01), Athanas et al.
Holtey Thomas O.
Murray, Jr. Thomas L.
Perzan Wayne A.
Smith Scott W.
Bull HN Information Systems Inc.
Chan Eddie P.
Driscoll Faith F.
Eakman Christina M.
Solakian John S.
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