100 Mpixel/sec single-chip integrated graphics controller (IGC)

The IGC, a single-chip 2-D raster graphics engine for 1-2-Mpixel, 8-bit pseudorealistic color desktop systems, is described. With on-chip controllers for video, RAMDAC, and interleaved VRAMs, together with dedicated hardware for scan-conversion, image and block transfers, clipping, and raster operations, the 185 K transistor, 208-pin custom IC operates at 25 MHz at full 1-Mbit VRAM bandwidth of 100 Mpixel/s. The IGC eliminates the performance bottleneck of workstations and personal computers by performing graphics functions at the maximum bandwidth of the interleaved pixmap with a minimum amount of support hardware. >