Two-player Karateka


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I thought I knew Charles Mangin: hardware guru extraordinaire, maker of connectors, adapters and miniature models. His RetroConnector brand has enabled Apple II keyboards to talk to USB-enabled machines, modern joysticks to be played on Apple II computers, and other interactions that span the eras. With a 3D printer, he's created miniature working monitors and Raspberry Pi cases shaped like a IIe. Well before I ever met him at KansasFest, I was blogging about Charles putting computers in Apple II peripherals. Creating intergenerational hybrids is Charles' niche.

Or so I thought. First, he started sharing his hardware knowledge in a video podcast series, How II. Then he was giving KansasFest sessions about music synthesizers. No 3D printers to be seen, but these topics could still be broadly categorized as hardware projects.

But now Charles is making a name for himself in a wholly new realm: software development. After tackling the significant task of teaching himself 6502 assembly, he released his first game, a Minesweeper clone. Then he innovated with an original title, Jumpy Guy. These are fun, simple games that demonstrate Charles' growth in this new role.

Now Charles is punching his way through one of the most famous games of all time: Karateka. No longer the tale of a lone gamer storming Akuma's fortress, Jordan Mechner's first published title has been patched to enable a second player to control Akuma's foot soldiers, putting some actual intelligence behind the hero's adversaries and making it more akin to the Apple II arcade port Karate Champ.

I would ask Charles to detail his patch in an issue of Juiced.GS, but he has already been thoroughly transparent on his website, detailing the mere 42 bytes that constitute the efficient patch. The updated game is playable online on the Internet Archive:

In the course of reinventing himself, Charles has reinvented Karateka. But gamers are a hungry lot, and some are already clamoring for more features, including joystick input and network play. I'd rather wait and see what Charles does of his own volition: like Apple Inc., he has an uncanny sense for giving us what we didn't know we've always wanted. Who knows where he'll take us — and himself — next?

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