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Looking for CoCo help? If you are trying to do something with your old Color Computer, read this quick reference. Want to contribute to this wiki? Be sure to read this first. This CoCo wiki project was started on October 29, 2004. --OS-9 Al

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Home / Hardware - 6809

The Motorola 6809EP from the CoCo 1 & 2

The Motorola 6809 is the central processing unit (CPU) of the CoCo.

It is an 8/16-bit microprocessor, and is considered to be one of the best 8-bit CPUs ever.

In the CoCo 1 and 2, the 6809EP, 1MHz rated variant is used. This indicates External clock, and Plastic encapsulated.

In the CoCo 3, the 68B09EP is used, this part rated up to 2 MHz. It can be replaced by the Hitachi 6309

The Motorola 68B09EP inside the CoCo 3