Display data transfer control apparatus applicable for display unit
US4849747A · kind A · utility
35Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1986 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Nov 7, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/393
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a display data transfer control apparatus in which a line control memory which can preset raster count data for modifying, in units of lines, an address of a main storage storing a character font to be displayed and character attribute data are provided, and a transfer line in the character font is determined for each line transfer in a DMA transfer sequence, so that, e.g., multi font control, character vertical elongation control, and ruled line vertical extension control, as well as processing character attributes such as an underline and overline, can be realized in the DMA transfer sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.