Karate ROM Hack

[pixeledm]

I was thinking about 1v1 fighting games on the VCS and how I'd love to see one. The closest that you can get is Karate and we all know that it pretty much sucks. I was wondering if he game could by modified via ROM hacking to lock the movement horizontally so that hitting the opponent is easier. Also the points system could be changed so that instead of trying to get the most points, each character has a set amount of points to begin with and each attack takes a certain amount of points away from the opponent depending on which attack was used. This would give a game reminiscent of classic 2d fighting games such as Street Fighter although without special moves etc. These seem like feasible changes to make however my knowledge is not near enough to do so, could anybody do this and would anyone be willing to?

 

Thanks,

~Pixel.

[gauauu]

In my complete ignorance, without having taken any time to try to reverse engineer the game: It's probably pretty feasible to do it.

 

That being said, it's always tricky to find someone willing to implement your ideas (everyone is working on their own ideas!) so you might not get a lot of traction with the idea.

 

Edit: Oh gosh, I forgot how bad that game was. I downloaded a copy thinking I'd look into it, but it's so awful I don't even want to mess with it.

Edited August 11, 2015 by gauauu

[+FujiSkunk]

Atari 2600 Double Dragon has a 1-on-1 fighting mode.

[gauauu]

Ok, I got bored today and thought I'd see what I could find in a couple minutes of playing around.

 

If you change the 4 bytes of $88 to $EA at $F48B (DEY to NOP) and the $C8's starting at $F496 to $EA as well (INY to NOP), that seems to prevent the players from moving up and down. (at least in the 30 seconds of oh-so-rigorous testing that I did). The attached file has the modification.

 

Although whenever I make ANY edits to the rom (even changing what appears to be blank space in it), something gets goofed up, and the numbers at the top get cut off. Not sure why. Oh well, not sure I'm going to take the time to figure out why.

 

Edit: I suspect it has something to do with Stella no longer knowing what game it is. Fiddling with the TV settings in the game properties menu of Stella let me tweak it to fix it, but maybe I'm missing something important.

karate-noUpDown.bin

Edited August 11, 2015 by gauauu

[pixeledm]

Ok, I got bored today and thought I'd see what I could find in a couple minutes of playing around.

 

If you change the 4 bytes of $88 to $EA at $F48B (DEY to NOP) and the $C8's starting at $F496 to $EA as well (INY to NOP), that seems to prevent the players from moving up and down. (at least in the 30 seconds of oh-so-rigorous testing that I did). The attached file has the modification.

 

Although whenever I make ANY edits to the rom (even changing what appears to be blank space in it), something gets goofed up, and the numbers at the top get cut off. Not sure why. Oh well, not sure I'm going to take the time to figure out why.

 

Edit: I suspect it has something to do with Stella no longer knowing what game it is. Fiddling with the TV settings in the game properties menu of Stella let me tweak it to fix it, but maybe I'm missing something important.

Thanks very much for looking into it! Maybe one day i'll try myself with the numbers however i wouldn't really know what i'm doing

 

Edit: Having just tested the ROM, I appear not to have any movement whatsoever. Not sure what's wrong.

Edited August 14, 2015 by pixeledm