Boots – shoes – and leggings
Patent
1978-03-20
1980-02-26
Thomas, James D.
Boots, shoes, and leggings
340347AD, 340347DA, 340347M, G06F 305, G06F 504, H03K 302
Patent
active
041908988
ABSTRACT:
Input/output (I/O) apparatus for a system is disclosed utilizing a digital processor for entering analog, digital and discrete data into the processor and receiving analog, digital and discrete data from the processor via an I/O data bus. A plurality of analog data signals are applied sequentially to an analog to digital converter via an analog input multiplexer. The resultant digital data are applied in bit parallel fashion to predetermined bits of the I/O data bus reserved for the input and output of analog data. Digital and discrete data is entered with the analog data by shifting the data from each of the digital and discrete data sources in bit parallel fashion into associated shift registers. The contents of the registers are shifted serially into respective predetermined bits of the data bus reserved for the input and output of the digital or discrete data. The contents of the plurality of shift registers for the digital or discrete data are shifted into the respective bits of the data bus in serial fashion while the sequence of parallel digital data from the analog inputs are entered in paralell into the data bus. Analog data is received from the bus via a digital-to-analog converter connected to the data bus bits reserved for the analog data. The digital words corresponding to the analog output data are sequentially applied in parallel to the digital-to-analog converter whose output is sequentially strobed into a plurality of sample and hold circuits to provide the analog data. Simultaneously with providing the sequence of analog data words, the I/O bus bits reserved for digital or discrete data provide the data in bit serial fashion to output shift registers. The outputs from the shift registers are strobed in parallel into the corresponding output digital or discrete data utilization devices.
REFERENCES:
patent: 3380042 (1968-04-01), Townsend
patent: 3546684 (1970-12-01), Maxwell
patent: 3700871 (1972-10-01), Montgomery, Jr.
patent: 3846762 (1974-11-01), Gregory
patent: 3921147 (1975-11-01), Fuhr
patent: 3936807 (1976-02-01), Edwards
patent: 4047159 (1977-09-01), Boudry
Farnsworth David L.
Thomas Ronald E.
Cooper Albert B.
Sperry Corporation
Terry Howard P.
Thomas James D.
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