Display control apparatus for controlling to write image data to a plurality of memory planes
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United States of America Patent
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-
Dec 6, 1988
Issued Date -
N/A
app pub date -
Jun 16, 1987
filing date -
Sep 21, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for controlling a plurality of memory planes in a writing operation in a display control apparatus of a graphic system, the method including the steps of selectively connecting a plurality of the memory planes to a data bus by using an interface unit; selectively applying a write enable signal to the memory planes from a plane designating unit; applying data to be written to the data bus from a central processing unit; writing the data into the memory planes to which the write enable signal has been applied and which are connected to the data bus; and writing predetermined fixed data into the memory planes to which is the write enable signal has been applied but which are not connected to the data bus.
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