The original IBM PC and MS DOS could — for the most part — only access 640KB of memory. The LIM EMS standard was at first a standard for RAM expansion cards to overcome this limit. On later machines like the 286 and 386 there was either support built into the chipsets or EMS memory was emulated via drivers like EMM386. Today we learn how to utilize EMS memory to play back an animation that is too large for conventional memory.