DOS games

Got my Thinkpad! But, some games crash out just as they start. Solar Winds, for example, will start in every configuration possible, but as soon as it gets to the part where the game has to take my inputs, it freezes within the first second, whether I supply any input or not.

Some other games also crash when the main game routine seems to be loading, like Valhalla / Ragnarok. Memory seems OK, though. Odd.