English Computing Dictionary
◊ HITACHI 6309
Hitachi 6309
(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
(http://www.sandelman.ottawa.on.ca/People/Alan_DeKok/interests/6309.tec