GB1257211A - - Google Patents
Info
- Publication number
- GB1257211A GB1257211A GB1257211DA GB1257211A GB 1257211 A GB1257211 A GB 1257211A GB 1257211D A GB1257211D A GB 1257211DA GB 1257211 A GB1257211 A GB 1257211A
- Authority
- GB
- United Kingdom
- Prior art keywords
- code
- entered
- keys
- register
- sets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
- H03M11/02—Details
- H03M11/04—Coding of multifunction keys
- H03M11/06—Coding of multifunction keys by operating the multifunction key itself in different ways
- H03M11/08—Coding of multifunction keys by operating the multifunction key itself in different ways by operating selected combinations of multifunction keys
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
- G06F3/0232—Manual direct entries, e.g. key to main memory
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
- H04L17/02—Apparatus or circuits at the transmitting end
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
1,257,211. Selective signalling. KOMBINAT ZENTRONIK VEB. 1 Jan., 1969, No. 46/69. Heading G4H. A keyboard circuit for providing a coded output to a tape punch or other storage device requires at least two key actuations to set up a complete code combination. In, the described embodiment an 8-bit code is entered in register F1-F8 by up to four successive operations of. decimal keys T1-T8. Operation of T8 sets F8, subsequent operation of oneof keys T1-T7 enters a corresponding binary code in F5-F7, a second operation of T8 sets F4, and a further operation of one of keys- T1-T7 entersa corresponding binary code in F1-F3. Thedistribution of successive-key inputs to register stages F1-F8 is effected, by the circuit ST1, F12, F13 and U2-U4. An interlock circuit prevents tape feeding or address incrementing until the complete code has been entered, but recording need not be prevented until all the code bits having been entered in register F1- F8. Release of a switch P allows direct entry of binary-coded decimal data into a data processor over, RW1-RW4.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4669 | 1969-01-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1257211A true GB1257211A (en) | 1971-12-15 |
Family
ID=9697421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1257211D Expired GB1257211A (en) | 1969-01-01 | 1969-01-01 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1257211A (en) |
-
1969
- 1969-01-01 GB GB1257211D patent/GB1257211A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |