A long time ago I worked on a debugger program that our company used to debug software that it sold that ran on IBM System 370. We had IBM 3270 CRT terminals that could display (I think) eight colors (if you count black), but the debugger display was only in black and white. I thought I might be able to make it a little more usable by highlighting important items in color. I knew that the debugger used a macro called WRTERM to write text to the terminal, and I thought maybe the description of
