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Build Like A Pyro!
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Take Me To The Gadgetory!
Ultim809: Homebrew 8-bit Computer

Posted June 8, 2011 by Chris

This is a great old-school article about how embedded systems used to be built. The article explains how to use a Motorola 6809 with some ROM, RAM and peripheral devices connected up to the address and data bus. A memory map is built up and rom programmed with some code to get things going. The author has all schematics and firmware available for download.

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