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Help with 6802 Microcontroller
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22nd Sep 2017, 9:32 pm
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Ancient Geek
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Join Date: Aug 2017
Location: Bristol, UK.
Posts: 136
Re: Help with 6802 Microcontroller
On the assumption that the 6821 is the keyboard interface (possibly other functions too, the schematic you posted doesn't show what it drives), it might be something as simple as a stuck down key.
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