I have a bunch of computers that I use for various projects including playing games and am running out of space or constantly swapping computers in and out of storage. Many IBM compatible games run in Tandy 16 color mode but do not support the IBM PCjr and are displayed in CGA 4 color mode. This modification allows the IBM PCjr to run many of those programs in Tandy 1000 16 color graphics mode which I hope will save me from adding yet another computer to the mix.
Tandy 1000 Graphics Mode Mod for IBM PCjr