The TeraDrive was an 80286 PC manufactured by IBM with an integrated Mega Drive (Genesis). The system was released in Japan only. Three models were available, ranging from ¥148,000 to ¥248,000. Only the top-of-the-line model was supplied with a hard disk. A special monitor (sold separately) was available, which could display both 15 kHz RGB video signals from the Mega Drive hardware and the 31 kHz VGA output of the PC hardware, both from the VGA connector. The system also contained composite NTSC video and stereo RCA jacks for connection to a TV. Additionally, Mega Drive games could be played at the same time as the PC section is being used, and it was possible for the Mega Drive and PC hardware to interact with each other, as shown with the Puzzle Construction program. It was also possible for Mega Drive software to be run from the PC's RAM.
This reminds me of the fact that Amstrad brought out a similar home computer-megadrive(genisis) combo in the UK in about '92-'93, it was probably based on this machine at the least or just this machine with a biege case and controller. I don't think you could use both parts at the same time, it was one or the other and only with the monitor. It didn't do too well and was, I think, the last coputer they sold.
Quote O' Matic
Klinger: I'll do anything! I'll wet my bed--I'll wet your bed--I'll wet the whole camp!"
-Klinger