02-09-2018, 01:42 PM (This post was last modified: 02-09-2018, 01:44 PM by Kruger.)
(I'm guessing that my post yesterday failed...)
It's too bad we didn't have a resource back then like we have today. And all of the cheap micro-controllers. While you could easily do it with an Arduino (or one of the many others), it's cheaper to just build it with basic components...
(Gaaaah, I can't get the images in the correct order this time. You'll need to visualize the top one at the bottom and visa versa...)
and so what uranus is a star - Rob
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Kruger
Since the joystick was an in/out IO port, you got either 0 or +5v I believe. That was connected directly to the 6520 PIA chip. The paddle controllers on the other hand look like they're input only (essential an analog to digital converter) and are controlled through POKEY. What was interesting is that the XL's only had the two joystick ports because they used the other two ports as a memory driver. "Hey guys, how should we handle this extra RAM? Ooo! Ooo! I know. We'll repurpose two of the joystick ports. Dude, that's genius."