Digital display data processor

• US 4,120,028 A
• Filed: 10/21/1976
• Issued: 10/10/1978
• Est. Priority Date: 10/21/1976
• Status: Expired due to Term

• Current Assignee: Gse Power Systems, Inc. (GSE Systems, Inc.)
• Original Assignee: Singer Company (SVP Holdings Ltd.)
• Inventors: Membrino, Robert J., Gaughan, John C.
• Primary Examiner(s): Springborn, Harvey E.
• Application Number:
  US05/734,660
• Time in Patent Office: 719 Days
• Field of Search: 340/324 A, 340/324 AD, 364/200 MS File, 364/900 MS File, 35/6
• US Class Current: 715/243
• CPC Class Codes: G06F 3/153 using cathode-ray tubes
• CPC Class Codes: G09G 1/10 the deflection signals being produced by essentially digital means, e.g. incrementally

Abstract

This invention relates to an electronic processing system that receives instruction and data words from a digital computer and automatically processes the instruction and data words to control the appearance of graphical and written matter on a plurality of display devices. The foregoing is accomplished by storing the instruction and data words in a first-in-first-out memory, decoding the formatted instruction word received from the first-in-first-out memory and routing the data that immediately follows the instruction words to the character and function generators so that the desired information may appear on the screens of the display devices. Thus, this invention reduces the number of computer instructions that are necessary to produce a given set of elements on the display devices so that an additional computer would not be required.

Claims

1. An electronic processing system that saves computer software and computer time by receiving instruction and data words from a digital computer that contain information for automatically controlling the appearance at a particular X, Y position of desired graphical conical matter, alphanumeric characters and symbols of predetermined sizes on a plurality of individually addressable stroke writing cathode ray tubes, said processing system comprising:

a. an interface that causes the instruction and data words of a digital computer to be electrically compatible with the remainder of said system so that the instruction and data words may be transferred from said computer;

b. a first-in-first-out instruction and data memory coupled to said interface so said instruction and data words which contain information on X, Y positioning, alphanumeric characters or symbol addressing, alphanumeric character size and conical radius and centering may be entered into said first-in-first-out memory and exit said memory serially in the order said data and instruction words entered said memory;

c. a first register coupled to said memory for temporarily storing at a given time one data word and/or one instruction word when the remainder of said system has completed the processing of the previous instruction and/or data word and is ready to process the next data or instruction word;

d. decoding means coupled to said first register for decoding the instructions stored in said register;

e. sequencing means coupled to said decoding means and said first register for controlled processing of said data word and/or said instruction word; and

f. a plurality of writing means for writing various types of conical graphical matter, alphanumeric characters and symbols on respective ones of said plurality of cathode ray tubes in accordance with the information given by said instruction and data words, said means coupled to said plurality of cathode ray tubes, said decoding means and said sequencing means, whereby said system follows the instructions and processes the data transmitted by said computer permitting said computer to process additional information since said computer will have less information to process because said computer will only send instruction and data words to said processing system when said computer wants to change the information and data currently appearng on one or all of said cathode ray tubes.

2. The system defined in claim 1 wherein said means for writing graphical matter is a conical function generator.

3. The system defined in claim 1 wherein said means for writing alphanumeric characters and symbols is a character generator.

4. The system defined in claim 3 further including means for causing the conical graphical matter, alphanumeric characters and symbols to blink on and off.

5. The system defined in claim 3 further including means for causing the alphanumeric characters and symbols to rotate about a fixed axis.

6. The system defined in claim 1 further including means for automatically calculating and moving the main beam of said cathode ray tube relative to an X,Y axis so that spacing for the next alphanumeric character to be written on said cathode ray tube is automatically determined in accordance with the size of the alphanumeric character to be written on the screen.

7. The system defined in claim 6 further including:

a. a second register for storing a portion of the data word which determines the address and size of the next alphanumeric character or symbol to be drawn; and

b. a decoder coupled to said second register, said plurality of writing means and said sequencing means for decoding the alphanumeric character size information contained in that portion of said data word stored in said second register and determining the X, Y displacement that said main beam must be moved under the control of said sequencing means before the next alphanumeric character or symbol is drawn.

8. The system defined in claim 1 wherein said decoding means is a binary-to-decimal decoder that decodes the instruction word stored in said first register so that the data words following may be processed through said system by said sequencing means according to the decoded instructions that are contained within the instruction word.

10. The system defined in claim 1 further including scaling means for writing straight lines of various sizes on said cathode ray tubes.

11. The system defined in claim 10 wherein said scaling means comprises:

a. a plurality of selectors, each of said selectors having a different bit of the data word comprising its input and its output being coupled to said means for writing; and

b. a manually controllable switch coupled to each of said selectors for controlling the magnitude of the line output of said selectors.

12. The system defined in claim 1 wherein said sequencing means comprises:

a. a plurality of sequence counters that advance to the next highest count upon the completion of a step in the processing of the instruction word and data word;

b. a plurality of decoders, each one of said decoders being coupled to a different one of said sequence counters for decoding the signal produced by said sequence counters;

c. a plurality of single shots coupled to said sequence counters and said decoders for controlling the length of time that a sequence counter will remain in a specific count; and

d. a plurality of delays coupled to said sequence counters, said decoders and said single shots for causing said sequence counter to remain in a particular count until said plurality of writing means have completed the processing of a step of said instruction word or data word.

9. The system defined in claim 16 wherein each instruction word contains an address so data words associated therewith may only be sent to one of said addressable cathode ray tubes, thereby permitting each said cathode ray tube to function independently of the others.