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Hitachi 6309

The 6309 is a version of the Motorola 6809 microprocessor, manufactured by Hitachi. Compatible with the 6809, it added two new eight-bit registers that could be added to form a second 16-bit register, and all four eight-bit registers could form a 32-bit register. It also featured division, and some 32-bit arithmetic and was generally 30% faster in native mode. Surprisingly, this information was never published by Hitachi.
Based on material from FOLDOC, used with permission.

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