TI-99/4a display question

Yeah. As Geoff says, they did make TI branded monitors. There were two that I am aware of - the early one, which was simply a modified 12" Zenith color television, and the later one, which was a much better 10" composite monitor. They were rare though. Most people bought the TI-99/4a because it was on clearance at the toy store and looked like fun. They just hooked it up to the TV set. Note that the TI only outputs composite video. The big clunky switchbox thing that came with the computer is a standalone composite to RF modulator, and it's powered by a 12v line on the video DIN plug. For a "period appropriate" setup, you'd want an 80's TV set. If, however, someone was serious enough to actually buy the PEB and upgrade the system, they would also have a real monitor. Any of the usual composite color video monitors were popular. TI's one for this era was pretty nice, but expensive and small. Something like the Amdek Color I would probably have been more common. -Ian