[riq_]

It seems to be a Tandy 1000 RSX which supports Windows 3.1

Original photo is from here, which has Windows 3.1 running: http://www.oldskool.org/guides/tvdog/RLRLX.html

[einr]

It's a 386SX, which absolutely will run Windows 3.1 but if you're going to be real picky, it definitely won't be as snappy as in the video ;)

[FreeFull]

Question is, would you be able to put a Soundblaster 16 inside it?

[throwaway09223]

Tandy 3-voice can play midi without an add on card.

[boondaburrah]

Right but I know Yamaha OPL sound when I hear it.

[einr]

The Tandy 1000 RSX has several ISA expansion slots. Putting a Sound Blaster in it is no problem.