Page, IanP.J.W. ten Hagen2015-09-292015-09-2919831017-4656https://doi.org/10.2312/eg.19831028RasterOp is a powerful primitive operation for raster graphics. To improve the execution rate of this operation, a machine with a set of 256 1-bit processors organised as a 16x16 array has been constructed. This machine has twodimensional bitmaps as its lowest-level data objects and consequently can manipulate them faster than a conventional (one-dimensional) Von-Neumann machine. Further work is outlined to improve the architecture still further and to integrate the array into a powerful single-user workstation.10.2312/eg.19831028