EP0149188A2
Expired / Lapsed
EP
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Display control system
Assignee: ASCII Corp
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Filing: 1984-12-20
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Granted: —
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Expires: 2004-12-20
Abstract
Abstract An improved display control system for use in a computer is disclosed which is equipped with functions of X, Y addressing and area movement so as to reduce the execution time necessary for display operations of the computer. Also, in this display control system, means for executing line commands is composed of hardware so as to reduce the execution time necessary for display operations on the line commands. The system comprises: means (38, 39) for specifying a start point of transfer in a source area (S); means (58, 59) for specifying a start point of transfer in a destination area (D); means (61) for holding amounts of data to be transferred in a horizontal direction; means (63) for holding amounts of data to be transferred in a vertical direction; and means (60, 62) for holding the transfer direction of each of horizontal and vertical transfer points, characterized in that said inter-area data transfer is executed by reading out data in said source area (S), specified by said means from said memory unit (4) and writing said read-out data sequentially into said destination area (D).
Inventors
- 👤 Takatoshi Ishii
- 👤 Ryozo Yamasita
- 👤 Kazuhiko Nishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 23:14
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/36; G09G5/39; G09G5/393
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
129 words
An inter-area data transfer control system for a memory unit (4) and forming display plane logic comprising: means (38, 39) for specifying a start point of transfer in a source area (S); means (58, 59) for specifying a start point of transfer in a destination area (D); means (61) for holding amounts of data to be transferred in a horizontal direction; means (63) for holding amounts of data to be transferred in a vertical direction; and, means(60, 62) for holding the transfer direction of each of horizontal and vertical transfer points, characterized in that said inter-area data transfer is executed by reading out data in said source area (S), specified by said means from said memory unit (4) and writing said read-out data sequentially into said destination area (D).
Claim 2
Dependent Claim
129 words
An inter-area data transfer control system for a memory unit (4) and forming display plane logic comprising: means (38, 39) for specifying a start point of transfer in a source area (S); means (58, 59) for specifying a start point of transfer in a destination area (D); means (61) for holding amounts of data to be transferred in a horizontal direction; means (63) for holding amounts of data to be transferred in a vertical direction; and, means(60, 62) for holding the transfer direction of each of horizontal and vertical transfer points, characterized in that said inter-area data transfer is executed by reading out data in said source area (S), specified by said means from said memory unit (4) and writing said read-out data sequentially into said destination area (D).
Claim 3
Dependent Claim
23 words
An inter-area data transfer control system as set forth in claim 1, characterized in that said memory unit (4) is a display memory.
Claim 4
Dependent Claim
36 words
An inter-area data transfer control system as set forth in claim 1 or 2, characterized in that said source area (S) or destination area (D) is a main memory via a single data register (34, 52).
Claim 5
Dependent Claim
30 words
An inter-area data transfer control system as set forth in claim 1 or 2, characterized in that said source area is a data register (34) provided within said control system.
Claim 6
Dependent Claim
33 words
An inter-area data transfer control system as set forth in claim 1, characterized in that a register pointer (44) for setting command parameters has a count function and is capable of successive settings.
Claim 7
Dependent Claim
33 words
An inter-area data transfer control system as set forth in claim 1 or 2, characterized in that said source area (S) or destination area (D) is expressed by values on X, Y coordinates.
Claim 8
Dependent Claim
49 words
An inter-area data transfer control system as set forth in claim 1, characterized in that said transfer direction of each of said transfer points is a direction in which said data transfer is performed in such order that the data within said source area is not written before transfer.
Claim 9
Dependent Claim
79 words
A display control system for a memory unit (4) and forming display plane logic, comprising: means (38, 39) for specifying start coordinates of a straight line; means (61) for holding amounts of displacement from said start coordinates in a horizontal direction; and means (63) for holding: amounts of displacement from said start coordinates in a vertical direction, characterized in that said straight line can be drawn from said start coordinates in a predetermined direction and with a predetermined length.
Claim 10
Dependent Claim
79 words
A display control system for a memory unit (4) and forming display plane logic, comprising: means (38, 39) for specifying start coordinates of a straight line; means (61) for holding amounts of displacement from said start coordinates in a horizontal direction; and means (63) for holding: amounts of displacement from said start coordinates in a vertical direction, characterized in that said straight line can be drawn from said start coordinates in a predetermined direction and with a predetermined length.
Claim 11
Dependent Claim
96 words
A display control system vor a memory unit (4) forming display plane logic, comprising: means (38, 39) for specifying start coordinates of a straight line; means (61) for holding amounts of displacement from said start coordinates in a horizontal direction; means (63) for holding amounts of displacement from said start coordinates in a vertical direction; and a logical operation means (51) for performing a logical operation between two predetermined sets of color code data, characterized in that said straight line can be drawn from said start coordinates in a predetermined direction and with a predetermined length.
Claim 12
Dependent Claim
96 words
A display control system vor a memory unit (4) forming display plane logic, comprising: means (38, 39) for specifying start coordinates of a straight line; means (61) for holding amounts of displacement from said start coordinates in a horizontal direction; means (63) for holding amounts of displacement from said start coordinates in a vertical direction; and a logical operation means (51) for performing a logical operation between two predetermined sets of color code data, characterized in that said straight line can be drawn from said start coordinates in a predetermined direction and with a predetermined length.
Claim 13
Dependent Claim
23 words
A display control system as set forth in claim 8 or 9, characterized in that said memory unit is a display memory (4).
Claim 14
Dependent Claim
26 words
The display control system as set forth in claim 8, 9 or 10, characterized in that said start coordinates are expressed by values X, Y coordinates.
References Cited (Backward Citations)
No citation records indexed.
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