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CHIP DSP-3 Super Nintendo

Not a game

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Developer:Nintendo
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Tags:bios, chip

DSP-3 is an assistant chip, used in only one game for the Japanese Super Famicom, a turn-based strategy game titled SD Gundam GX. The chip assists with tasks like calculating the next AI move, Shannon–Fano bitstream decompression, and bitplane conversion of graphics.

This series of fixed-point digital signal processor chips allowed for fast vector-based calculations, bitmap conversions, both 2D and 3D coordinate transformations, and other functions. Four revisions of the chip exist, each physically identical but with different microcode. The DSP-1 version, including the later 1A die shrink and 1B bug fix revisions, was most often used; the DSP-2, DSP-3, and DSP-4 were used in only one title each. All of them are based on the NEC µPD77C25 CPU and clocked at 8Mhz.