Cathode ray tube controller
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United States of America Patent
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-
Sep 19, 1989
Grant Date -
N/A
app pub date -
Jul 24, 1987
filing date -
Jul 25, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cathode ray tube controller holds a write-in address and displaying image data or a read-out address from a central processing unit. The cathode ray tube controller makes access to a memory by a write-in or read-out address from the central processing unit during a period in which the displaying image data in a horizontal scanning period are not read out from the memory, so that the read or write operation with respect to the memory can be carried out during the horizontal scanning period.
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