At home my elder brother still uses an old i386 PC though he has a brand new Compaq. That i386 machine has a history - it was the first PC ever in my village and it was the first machine on which I laid my hands on. I learned those nitty DOS commands on it. It’s aged more than 15 years old now, but still functional.
I was in a difficult situation "how can I install those DOS games on my PCLinuxOS 2007 machine, a brand new VIA-Intel hybrid PC?". I browsed forums, googled for a while, punched the keywords "linux dos games", "how to play dos games in pclinuxos, linux" etc. And then got search results related to Wine and DOSemu. Installed those packaged from PCLinuxOS repository through synaptic. And I am there, I could play almost all those games.
(For a wholesome knowledge of DOSemu, please refer this great guide: http://www.tldp.org/HOWTO/DOSEMU-HOWTO.html. This guide will help you how to emulate any DOS applications in Linux.)