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Commodore SX-64 White screen

Just in case you are unaware, there are CRT controls hidden behind the panel on the right side. There's also a floppy reset button and volume control. I don't suspect this will fix your display but ...
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How to properly convert an active-low joystick routine to active-high

So as it turns out, the reason this didn't work had nothing to do with the joystick. It was because I was using zero page addresses $00 and $01 to store the joystick output, which was clobbering the ...
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