Dual video output board with a shared memory interface
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United States of America Patent
Stats
-
Sep 7, 1999
Grant Date -
N/A
app pub date -
Feb 19, 1997
filing date -
Feb 19, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The novel graphics system (10) includes multiple displays (20 and 22) supported by a single frame buffer (18) thereby reducing hardware requirements and costs. The system (10) further includes an operating system driver interface (12), a software driver interface (14) and graphics circuitry (16). In one embodiment, the graphics circuitry (16) includes a graphics chip (34) for providing an analog output (36) and a digital output (38). The digital output (38) is processed by a data reformatter (40) and a digital-to-analog converter (42) to provide an analog signal (44). The invention thus takes advantage of existing mixed output chips to implement a multiple analog CRT monitor system in a cost effective manner.
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