US4870406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High resolution graphics display adapter
Assignee: International Business Machines Corp
•
Filing: 1987-02-12
•
Granted: 1989-09-26
•
Expires: 2007-02-12
Abstract
Abstract A display adapter for displaying graphics data in pixel form on a high resolution display monitor includes a digital signal processor for managing adapter resources and controlling coordinate transformations, a system storage which is divided into a first portion for storing instructions for the digital signal processor and the second portion for storing data representing information to be displayed, an input buffer for permitting asynchronous and overlapped communication between the graphics display adapter and a host computer to speed operation of the system, a pixel processor for drawing vectors and manipulating areas to be displayed on the monitor, a bit mapped frame buffer, a color palette connected to outputs of the frame buffer for providing appropriate color signals to the high resolution monitor and a cursor circuit for controlling display of a cursor on the screen on the monitor.
Inventors
- 👤 Satish Gupta
- 👤 Leon Lumelsky
- 👤 Robert L. Mansfield
- 👤 Hector G. Romero, Jr.
- 👤 Marc Segre
- 👤 Alexander K. Spencer
- 👤 Joe C. St. Clair
- 👤 James D. Wagoner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:27
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/36; G09G5/39; G09G5/393
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
215 words
A system for displaying graphics data in pixel form on a high resolution display monitor, comprising, in combination; a host processor for providing instructions and data representing information to be displayed; a graphics adapter, connected to said host processor, comprising: a system storage connected to said host processor for storing instructions and data representing information to be displayed; a first processor connected to said system storage for managing a plurality of graphics adapter resources and for performing transformation on coordinate data stored in said system storage; a first-in, first-out input buffer connected to said first processor for providing a synchronous and overlapped communication between said graphics adapter and said host processor; a second processor connected to an output of said first processor and to said system storage for drawing vectors and manipulating areas to be displayed on said monitor; a frame buffer connected to outputs of said second processor for storing bit map of data to be displayed, said first and second processors being used to update said frame buffer data; a color palette connected to outputs of said frame buffer providing selected color signals to said display monitor; and a cursor generating circuit connected to said color palette and to said first processor for controlling the display of a cursor on said display monitor.
Claim 2
Independent Claim
215 words
A system for displaying graphics data in pixel form on a high resolution display monitor, comprising, in combination; a host processor for providing instructions and data representing information to be displayed; a graphics adapter, connected to said host processor, comprising: a system storage connected to said host processor for storing instructions and data representing information to be displayed; a first processor connected to said system storage for managing a plurality of graphics adapter resources and for performing transformation on coordinate data stored in said system storage; a first-in, first-out input buffer connected to said first processor for providing a synchronous and overlapped communication between said graphics adapter and said host processor; a second processor connected to an output of said first processor and to said system storage for drawing vectors and manipulating areas to be displayed on said monitor; a frame buffer connected to outputs of said second processor for storing bit map of data to be displayed, said first and second processors being used to update said frame buffer data; a color palette connected to outputs of said frame buffer providing selected color signals to said display monitor; and a cursor generating circuit connected to said color palette and to said first processor for controlling the display of a cursor on said display monitor.
Claim 3
Dependent Claim
44 words
A system for displaying graphics data in pixel form on a high resolution graphics display monitor according to claim 1, wherein said first processor comprises a digital signal processor having a capability of handling interrupts from either said host processor or said second processor.
Claim 4
Dependent Claim
47 words
A system for displaying graphics data in pixel form on a high resolution graphics display monitor in accordance with claim 1, wherein said system storage further comprises; a first portion for storing instructions for said first processor; and a second portion for storing data to be displayed.
Claim 5
Dependent Claim
49 words
A system for displaying graphics data in pixel form on a high resolution graphics display monitor according to claim 3 wherein said first portion of said system storage is organized such that frequently executed program code loops are stored on a common memory page for enhancing system execution speed.
Claim 6
Dependent Claim
43 words
A system for displaying graphics data in pixel form on a high resolution graphics display monitor in accordance with claim 3 wherein said second portion of said system storage comprises dual ports for allowing simultaneous access by said host and said first processors.
Claim 7
Dependent Claim
54 words
A system for displaying graphics data in pixel form on a high resolution graphics display monitor according to claim 1 wherein said first-in, first-out input buffer is adapted to store a plurality of flag bits which may be interrogated by said host processor to determine availability of said display system for further data transfer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |