processor (HD6309) Hitachi's version of the Motorola6809 microprocessor. 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.

This information, surprisingly, was never published by

Hitachi.