"I purchased an old OSI system consisting of a 500 CUP board (revision A), a model 430B I/O board, 12K of memory and a Teletype model ASR-33 terminal with tape reader. The system is also currently cassette based.
In 1977, OSI sold a video board (model 440) and two video support ROM's (65V prom monitor and 500VB prom) for use with a Black-and-White monitor. These items are no longer available from OSI.
Since I purchased the above for next to nothing purely as a learning tool in conjunction with my studies, I wish to establish a video terminal for minimum cost.
I would greatly appreciate hearing from any of you who may have had a similar situation." Frank Koelbl