General purpose data terminal system with display line refreshing and keyboard scanning using pulsewidth modulation
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United States of America Patent
Stats
-
Feb 28, 1984
Grant Date -
N/A
app pub date -
Dec 29, 1980
filing date -
Dec 29, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A General purpose terminal system included microprocessor-controlled line refresh apparatus wherein an internal address table is updated, in real time, to control the line refreshing of the CRT display; a pulse width modulated serial keyboard scanning apparatus; and smooth scrolling/double-height/double-width apparatus.
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