"Man in the Mirror" by Michael Jackson is the No. 1 Billboard hit, and Sony's Disk-Jockey CD player was selling for $400. It's also the year that Sega released the Sega Mega Drive in Japan.

The latter was incorporated into a plethora of different form factors, including the little known IBM PC/Mega Drive combo known as the Sega Teradrive. Finding a rare Japanese 1990s PC stateside is ...