Hierarchical computer system for generating selective output signals in response to received input signals
First Claim
1. A computer system wherein a microcomputer comprising an arithmetic unit and a plurality of registers is connected to a signal source and a computer, said microcomputer is programmed for decoding an input signal from said signal source composing the decoded signal into an message, and transmitting the message to said computer, the improvement comprising:
- said microcomputer comprising means for detecting the change in level of the input signal;
said microcomputer comprising means for decrementing which is operatively connected to a first of said registers and responsive to said detecting means, wherein said decrementing means decrements the contents of said first register from a first predetermined value commencing +1 clock cycles after the input signal changes level, whereby n clock cycles are available to the microcomputer to compose said message;
said microcomputer unit further comprising a means for loading said first register with a second predetermined value from a second of said registers when said first register means reaches zero, a means responsive to the detection means for incrementing said first register, said second predetermined value is incremented until the input signal again changes level, and means responsive to the detection means to generate a new first predetermined value and a new second predetermined value from the final incremented value in said first register.
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Abstract
Hierarchical three-level computer system for receiving input messages from signal sources (23) and for conditionally activating output devices (26) according to input messages; the system comprising a host computer (15), a terminal computer (27) and a number of micro computers (22). The central computer enters condition tables into specific storage modules (2A-2E) within the terminal computer. These tables can be displayed on the terminal computer screen (10) and may be updated from the terminal computer keyboard (8). The micro computer receives input signals from a signal source (22) and composes input messages, which are transferred to the terminal computer. The terminal computer makes a comparison between input messages and condition table data and selectively activates the output devices (26).
A specific up and down counting apparatus within the micro computer enables a simultaneous signal detection and data processing operation.
31 Citations
7 Claims
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1. A computer system wherein a microcomputer comprising an arithmetic unit and a plurality of registers is connected to a signal source and a computer, said microcomputer is programmed for decoding an input signal from said signal source composing the decoded signal into an message, and transmitting the message to said computer, the improvement comprising:
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said microcomputer comprising means for detecting the change in level of the input signal; said microcomputer comprising means for decrementing which is operatively connected to a first of said registers and responsive to said detecting means, wherein said decrementing means decrements the contents of said first register from a first predetermined value commencing +1 clock cycles after the input signal changes level, whereby n clock cycles are available to the microcomputer to compose said message; said microcomputer unit further comprising a means for loading said first register with a second predetermined value from a second of said registers when said first register means reaches zero, a means responsive to the detection means for incrementing said first register, said second predetermined value is incremented until the input signal again changes level, and means responsive to the detection means to generate a new first predetermined value and a new second predetermined value from the final incremented value in said first register. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification