Patent ID: 7837558

Claim:
An emulator for execution on a first hand-held system including a first processor, first user controls and a single display, the emulator at least in part emulating the operation of a hand-held second system used to play video games, the second system comprising a second processor, second user controls, and first and second displays, the emulator comprising: first instructions for execution by the first system to access a memory storing video game program instructions compatible with the second system, wherein the video game program instructions are for a video game program in which game images are displayed on both the first and second displays of the second system when the video game program is executed by the second processor and wherein at least some of the video game program instructions stored in the memory are incompatible with the first system; second instructions for execution by the first system to transform at least some of the video game program instructions stored in the memory that are incompatible with the first system into transformed instructions that are compatible with the first system; and third instructions for execution by the first system to use the transformed video game program instructions in generating game images which are displayed on the single display of the first system and which correspond to the game images displayed on both the first and second displays of the second system when the video game program is executed by the second processor.