First commercially available color RASTER graphics terminal?

On 2/3/12 12:49 PM, Richard wrote: The 4027 is an architectural decedent of the ISC displays. Graphics are built up from programmable character glyphs. It was tough to build a raster graphics display because of the cost of frame buffer memory at the price that made sense in the terminal market in the 70's. Companies like Hazeltine built color graphics systems that were used in the process control market in the late 60's and early 70's, but they were VERY expensive. ISC Intecolor displays were used a lot in that market because they were inexpensive, and graphics didn't require high resolution. The ISC display monitor was quite clever at the time, too, with their electronic convergence system. Advanced Electronic Design (AED) built one of the first inexpensive frame buffer terminals around 1980, mainly driven by inexpensive 4116 DRAM and high speed integrated circuit D/A converters. So, there are some qualifiers, like all 'firsts'. Full frame buffer, or programmable character sets, for example.