Programmable video display character control circuit using multi

Details Programmable video display character control circuit using multi Programmable video display character control circuit using multi

1983-04-25

1986-06-17

Thomas, James D.

Boots, shoes, and leggings

364521, 340799, 340800, 340801, G06F 3153, G06F 1300

Patent

active

045959960

ABSTRACT:
A video display control circuit, for an intelligent terminal, includes a large cost efficient Random-Access Memory (RAM). A portion of the RAM memory is utilized as a high speed character generator instead of employing a dedicated Read Only Memory (ROM). Novel timing and memory control circuits are provided which permit characters to be generated witout any delay or change of real character timing. The characters in RAM may be modified or changed which is not possible with dedicated Read Only Memories.

REFERENCES:
patent: 3426344 (1969-02-01), Clark
patent: 4203107 (1980-05-01), Lovercheck
patent: 4243987 (1981-01-01), Bobick
patent: 4303986 (1981-12-01), Lans
patent: 4338599 (1982-07-01), Leininger
patent: 4342095 (1982-07-01), Goodman
patent: 4379293 (1983-04-01), Boisvert et al.
patent: 4393377 (1983-07-01), Couder et al.
patent: 4412294 (1983-10-01), Watts
patent: 4445169 (1984-04-01), Wakita
patent: 4475161 (1984-10-01), Stock
J. R. Mathis, Two-Port Character Generator, IBM Technical Disclosure Bulletin, (vol. 22, No. 7, Dec. 1979), pp. 2622-2623.
R. A. Schultz, Interactive Graphics Terminal, IBM Technical Disclosure Bulletin (vol. 23, No. 5, Oct. 1980), pp. 1770-1779.
P. Verebely, GD80-A Multi-Microprocessor Architecture for Computer Graphics, (Euromicro Journal, vol. 6, Nov. 1980), pp. 406-409.
D. A. Kummer et al., All-Points-Addressable Raster Scan Graphics for CRT with Dual Ported Bit Map, IBM Tech. Discl. Bull. (Jan. '81), pp. 3553-3555.

Affiliated with

Also associated with

Rating

Programmable video display character control circuit using multi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Programmable video display character control circuit using multi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmable video display character control circuit using multi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2276482