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The Nintendo Game Boy was initially launched in 1989. It sported a custom version of the famous and time-tested Z80 microprocessor operating at just below 4.2 MHz, 8kB RAM, 8kB VRAM, and 256kB ROM images. The LCD was a tiny 160x144 (measuring 2.6" diagonal actual size), and some games ran at a resolution scaled even smaller in the interest of speed and RAM. This original form existed until 1995, when a smaller, lighter, slightly faster version with a sharper screen was introduced, the Game Boy Pocket.

In its various forms, including GB Light, GB Color (GBC), GB Advance (GBA), GBA Special (GBA SP), the Nintendo DS, and the GB Micro, the Game Boy has held an utter deadlock on the handheld gaming device market since its introduction, partly because of superior developer support, partly because of its forms offering backward compatibility, and partly because of its popularity. Because the various forms are counted as one device with modifications (the DS is the only different device), the Game Boy is the best-selling video game system in history.

Super Mario Land