Keyboard operated terminal apparatus

• US 4,012,594 A
• Filed: 08/06/1974
• Issued: 03/15/1977
• Est. Priority Date: 08/06/1974
• Status: Expired due to Term

• Current Assignee: Emanuel Marvin Paller
• Original Assignee: Emanuel Marvin Paller
• Inventors: Paller, Emanuel Marvin
• Primary Examiner(s): Robinson, Thomas A.
• Application Number:
  US05/495,254
• Time in Patent Office: 952 Days
• Field of Search: 179/2 DP, 179/3, 179/4, 179/90 AN, 179/90 K, 340/172.5, 340/365 R, 178/17 R, 178/17 A, 178/17.5, 178/24
• US Class Current: 714/11
• CPC Class Codes: G06F 3/0489 using dedicated keyboard keys or combinations thereof
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: G09G 3/14 Semiconductor devices, e.g. diodes

Abstract

A keyboard operated terminal apparatus includes a main memory for storing a number of frames of data, and a display memory for storing a selected frame of such data. The two memories are coupled in a closed feedback loop, thereby enabling recall, deletion, insertion and display of any selected data frame. Data words are moved through the loop, and the data bits are synchronized by a timing clock circuit.

Claims

1. A keyboard operated terminal apparatus comprising:

a main memory for storing an N number of data frames, each frame consisting of a given number of characters, each character consisting of a finite number of data bits;

a display memory for storing a selected one frame of said N number of data frames;

said data frames being stored statically in said main memory and display memory when the keyboard is not operated;

means including the keyboard for entering characters of data into said display memory;

means for entering a frame of data into said main memory;

means for shifting N-1 frames of data from said main memory and for recalling a selected frame of data for storage in said display memory;

means for displaying a frame of data statically stored in said display memory;

means for converting said N number of data frames stored statically in said main memory to an audio signal, said converting means being coupled to the output of said main memory; and

means for transmitting said audio signal to an apparatus other than said terminal apparatus;

said display memory, main memory and means for recalling being coupled in a closed feedback loop.

2. Apparatus as in claim 1, including a loop counter for synchronizing the shifting of data in said memories.

3. Apparatus as in claim 2, including a clock sync. generator for synchronizing and gating said loop counter.

4. Apparatus as in claim 3, wherein said recalling means comprises a recall gate coupled to the output circuit of said clock generator for recalling N-1 frames of data for display and editing.

5. Apparatus as in claim 1, wherein said clock sync. generator includes means for providing gate signals to control said data displaying means and said signal transmitting means.

6. Apparatus as in claim 1, wherein said data converting means comprises a BCD to ASCII memory converter and a digital to audio converter for enabling transmission of said data frames.

7. Apparatus as in claim 6, including a parity generator coupled to said memory converter for adding a parity bit with start and stop signals to the BCD data.

8. Apparatus as in claim 1, including identification signal means coupled to the input of said memory converter.