Graphics system with graphics controller and DRAM controller

Details Graphics system with graphics controller and DRAM controller Graphics system with graphics controller and DRAM controller

1988-12-21

1991-02-05

Harkcom, Gary V.

Boots, shoes, and leggings

340799, 364521, G06F 1520

Patent

active

049911120

ABSTRACT:
A graphics system comprising a screen processor which separately formulates the requests for access to a single word and the requests for access to a plurality of consecutive words, a bus arbitrator to arbitrate the requests for access to a single word and to select a request, and a DRAM Dynamic Random Access Memory, controller to arbitrate the requests for a plurality of words and the refresh requests. The DRAM controller preferably comprises an automatic system which directly generates line and column control signals. The automatic system is preferably constructed in the form of a PLA (Program Logic Array).

REFERENCES:
patent: 4453214 (1984-06-01), Adcock
patent: 4802118 (1989-01-01), Honda et al.
patent: 4816815 (1989-03-01), Yoshiba

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