Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1984-04-27
1988-02-16
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340723, 340798, G09G 116
Patent
active
047258314
ABSTRACT:
A real-time video graphics system for generating solid polygons on a raster display screen from X-Y vertex coordinates of the polygons. Solid objects are defined in a host processor system as three-dimensional polygons. The host processor calculates the X-Y vertex coordinates for each polygon and deposits them, along with a corresponding instruction and pixel video data, in a shared RAM. The video graphics system obtains the instruction and data from the shared RAM and calculates from the X-Y vertex coordinates the X coordinates of the left and right edges of each solid polygon for each horizontal line of the display. The system writes pixel data for a horizontal stripe of 32 pixels into a frame buffer in one frame buffer memory write cycle of approximately 320 nanoseconds. Pixel data is periodically read out of the frame buffer, one complete stripe at a time, and shifted out serially to refresh the display screen.
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Curtis Marshall M.
XTAR Corporation
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