In this video I try to figure out if the C64 four player interface board will work with Vision Basic.
Get your copy of Vision Basic 1.1 here:
https://visionbasic.net/
Pick up your own 4 player interface board:
https://www.protovision.games/shop/product_info.php?products_id=34&language=en
Grab the source here:
https://github.com/graydefender/RandomStuff