Hi guys!
I've got a Sharp Twin Famicom and I've successfully modified my PAL 4-score to allow me to plug it into my extension port and into the 4score two external controllers or supposedly a zapper in port 2 (can't test because I don't own a zapper, mine was lost in space and time). However! My question is about 4-player support: If and how it's possible to modify my 4score to get it working!?
ericj over at famicomworld told me to ask around here to see if someone knows anything about it... Here's my thread and progress so far: http://www.famicomworld.com/forum/index.php?topic=4906.msg108165
Currently my only game at disposal to try 4-player is Super Spike V'Ball (PAL). I did try it, but it doesn't allow me to choose 2v2. and playing 1v1 and putting controllers into third and fourth slot will only make player 1 and player 2 move... Obviously I figured as much as I'm basically sending same signal from both.
Having read: http://nesdev.icequake.net/ffpa.txt
I saw that famicom games were programmed in one way, and nes games in another way. So my question is... Will I be able to somehow shift the bits coming from p3 and p4? Because according to that txt (if I understand it correctly), all data is sent over p1 and p2. even p3 and p4, just that the data is added to p1 and p2. p1 and p3 share the same clock and p2 and p4 share the same clock. I'd like to have it working for both japanese and european games ofc, but if one of them works, it's great.
But I can't simply connect a cable between p1 and p3 data, because I'd be sending the exact same data. Pushing right on p3 would be the same as pushing right on p1, exact same data? Right? I'm not really great with this, but there should be some way without modifiying my Sharp Twin Famicom inside to get this working, or?
According to a guy over here (look at bottom): http://www.assemblergames.com/forums/showthread.php?p=264070
I'd need to modify famicom expansion port inside my sharp twin famicom with some IC called: 74LS368 in order to create the proper signals for port 1. o_O
Please respond here and not over there!
I've got a Sharp Twin Famicom and I've successfully modified my PAL 4-score to allow me to plug it into my extension port and into the 4score two external controllers or supposedly a zapper in port 2 (can't test because I don't own a zapper, mine was lost in space and time). However! My question is about 4-player support: If and how it's possible to modify my 4score to get it working!?
ericj over at famicomworld told me to ask around here to see if someone knows anything about it... Here's my thread and progress so far: http://www.famicomworld.com/forum/index.php?topic=4906.msg108165
Currently my only game at disposal to try 4-player is Super Spike V'Ball (PAL). I did try it, but it doesn't allow me to choose 2v2. and playing 1v1 and putting controllers into third and fourth slot will only make player 1 and player 2 move... Obviously I figured as much as I'm basically sending same signal from both.
Having read: http://nesdev.icequake.net/ffpa.txt
I saw that famicom games were programmed in one way, and nes games in another way. So my question is... Will I be able to somehow shift the bits coming from p3 and p4? Because according to that txt (if I understand it correctly), all data is sent over p1 and p2. even p3 and p4, just that the data is added to p1 and p2. p1 and p3 share the same clock and p2 and p4 share the same clock. I'd like to have it working for both japanese and european games ofc, but if one of them works, it's great.
But I can't simply connect a cable between p1 and p3 data, because I'd be sending the exact same data. Pushing right on p3 would be the same as pushing right on p1, exact same data? Right? I'm not really great with this, but there should be some way without modifiying my Sharp Twin Famicom inside to get this working, or?
According to a guy over here (look at bottom): http://www.assemblergames.com/forums/showthread.php?p=264070
I'd need to modify famicom expansion port inside my sharp twin famicom with some IC called: 74LS368 in order to create the proper signals for port 1. o_O
Please respond here and not over there!