IBM's PGA Adapter

For those interested in programming information, the pc-vista package (available at http://www2.sci.muni.cz/pub/ccdsoft/ (the first place google returned)) contains some PGA image display routines. The commands were text based. To clear the screen to color 0 you'd write " CLS 0 " into the communications buffer. To draw a circle or radius 10 at (150,150 ) in color 15 using line function 1 you'd send " LF 1 C 15 M 150 150 CI 10 ". The PGA routines for PC Vista were written here at UCB. The undergraduate lab used to have an AT with a PGA. We also had a couple of PC-RT's running X10 as a windowing system as opposed to X11. And a couple XTs running some Unix version (PCIX?) I'm sure they have long since gone to the surplus store or the scrap heap. :( I need to stop the nostalgia now or I'll break into a rousing rendition of "Where have all the RTs gone?" Eric