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6809
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This page was last updated on 04/25/2008. Total Pages: 729. Total Files: 993.
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
