processor (HD6309)
Hitachi's version of the
Motorola 6809 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.
Technical reference (https://sandelman.ottawa.on.ca/People/Alan_DeKok/interests/6309.techref).
(1997-03-21)