Zig's SNES Repros

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Troglodyte
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Re: Zig's SNES Repros

Post by Troglodyte »

Is there any empty red SNES carts for sale? I would like to have one for a custom copy of Super Metroid.


As I know of; not as of yet. You can either wait for http://www.RetroUSB.com to release them (which they will be releasing red ones at some point; they will look similar to the SNES PowerPak, I assume), or use a commonly available game that comes in red casing; such as Doom or Maximum Carnage. I suppose you could even spray paint your own with Krylon.
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Re: Zig's SNES Repros

Post by classicgamer5 »

Troglodyte wrote:
Is there any empty red SNES carts for sale? I would like to have one for a custom copy of Super Metroid.


As I know of; not as of yet. You can either wait for http://www.RetroUSB.com to release them (which they will be releasing red ones at some point; they will look similar to the SNES PowerPak, I assume), or use a commonly available game that comes in red casing; such as Doom or Maximum Carnage. I suppose you could even spray paint your own with Krylon.

I guess I could buy/trade for a copy of one of those or even a broken copy so I could use the case
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Re: Zig's SNES Repros

Post by Troglodyte »

I guess I could buy/trade for a copy of one of those or even a broken copy so I could use the case


I have at least one extra copy of Doom available right now.
I ordered them primarily for trying to make my own Star Fox 2 cart(s).

I'd be glad to sell (or maybe trade) it to you without the game PCB itself inside.
Of course, since it is a Super FX game, if it is used to house a non Super FX
game, then there will be very small openings near either side of the edge
connectors of the game PCB. If you used Maximum Carnage, then you
wouldn't have this very small problem, but I think that game is more
rare. Hardly an issue, but I thought I would mention it to be fair.

Anyway, PM me about prices if you are interested.
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Ziggy
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Re: Zig's SNES Repros

Post by Ziggy »

emwearz wrote:If you get around to doing NES repro's I would be very interested in SMB2 (and FF2/3) might have to do a bulk order form you to save on postage.


To tell you the truth, you're probably better off getting them from gamereproduction.com or nesreproductions.com, both sites have them for sale for good prices.

GameReproductions.com
http://www.gamereproductions.com/produc ... sy-II.html
http://www.gamereproductions.com/produc ... y-III.html
http://www.gamereproductions.com/produc ... Japan.html

NESreproductions.com
http://img.photobucket.com/albums/v179/leonki/ff2_cart.jpg
http://img.photobucket.com/albums/v179/leonki/ff3_cart.jpg
http://img.photobucket.com/albums/v179/leonki/smb2_cart.jpg

While I think I know how to make NES repros, I have no real desire to make any at current moment. Both the above mentioned sites have those games for sale for good prices, I wouldn't be charging any less than that anyways.

Hobie-wan wrote:If you are successful and do make some Gleylancer/Undead Line/Eliminate Down ones, I have 2 dead Genesis cart all ready to play donor. Though since Genesis carts are so simple inside, it seems that unless the cart needs the extra bits for a battery save, that probably any cart can be a donor. And if that's the case, helloooo cheap sports games!


Damnit, Hobie! Why did you change your avatar!? lol. I'm not too sure yet, but I'll find out after I make a couple of carts.

emwearz wrote:Yea but you wouldnt want to use any of those EA ones, I always hated there carts.


Funny that you say that because I plan to put Mega Man on an EA sports cart lol. It's just what I have lying around, so it'll have to do.

Hobie-wan wrote:I've nearly busted a few of those stupid yellow tabs too.


Yeah, what's the deal with those. It looks like a security lock tab that you'd find on a rental case or something. When I opened mine last night, the yellow tab was still on it. I just slipped the PCB out with out removing the tab lol. If my Mega Man cart works, that yellow tab will just get sprayed black, I don't mind having the slightly taller case lol.

Troglodyte wrote:1. Which color cartridges were produced, and which games used these colors?


There was different color Genesis carts? That's news to me, I've never seen any before. My Maximum Carnage cart is black.

Troglodyte wrote:2. Can bare Sega Genesis / Mega Drive cartridge casings be found for purchase anywhere?


Not that I know of.

classicgamer5 wrote:Is there any empty red SNES carts for sale? I would like to have one for a custom copy of Super Metroid.

classicgamer5 wrote:I guess I could buy/trade for a copy of one of those or even a broken copy so I could use the case


I would just spray a Metroid cart with Krylon Fusion, no sense in going through the hassle of swapping cases and having to make new labels. Krylon Fusion looks AWESOME, I bet you wouldn't be able to tell the difference from a Doom cart. Just unscrew the Metroid cart, use painters tape to cover the front and back labels, and cover the plastic with a cloud of red Krylon Fusion. I bet one coat would even do it. Let it sit for several hours for the best results.

Troglodyte wrote:Of course, since it is a Super FX game, if it is used to house a non Super FX game, then there will be very small openings near either side of the edge
connectors of the game PCB.


Actually, it wont work at all. The tabs on the inside that hold the PCB in place are different, so you wont even be able to insert the Metroid PCB in the Doom case. I learned this the hard way.

Troglodyte wrote:I have at least one extra copy of Doom available right now.
I ordered them primarily for trying to make my own Star Fox 2 cart(s).


Why Doom? I did a lot of ready on the matter when I was building my first Star Fox 2 cart. Did you get Doom because you wanted the faster FX chip? Doom doesn't have SRAM so you can't save the high scores and whatnot :(

The FX chip in Stunt Race FX is perfectly fine for Star Fox 2, I would just use that as a donor (and I do).
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Re: Zig's SNES Repros

Post by Ziggy »

Well I just tried to make a Bare Knuckle 3 Genesis cart and it's not working. I think I may be using a wrong donor cart for it.

I have Power Rangers and Jurassic Park for Genesis, both are 16Mbit games. I opened them up and they're actually slightly different. I tried it on the Jurassic Park cart, I don't have time now but later I'll try it on the Power Rangers cart and see if that works.

I've been told that you need a donor cart that is the same size or bigger than the game you wanna put on it. I don't know if that is true or not. Bare Knuckle 3 is 24Mbit, maybe games over 16Mbit need an extra line addressing chip? My Genesis collection is pretty limited, I don't have any games that are 24 or 32Mbit that I can open to check out the PCB. Does any one have one they can open and take a pic of the PCB for me?

Today wasn't a total loss, though. I finally made a Little Magic cart for myself! Hopefully I'll have some time later to try and put Bare Knuckle 3 on the Power Ranger cart and see if that works. If it doesn't, I guess I'll have to pick up a donor cart for it.

And if it doesn't work, I'll have to get a donor cart for Mega Man - The Wily Wars as well. Mega Man is a 16Mbit game, and the only cart I have worthy of using as a donor that also has a save battery is an 8Mbit game.

Kinda weird, I'm use to making SNES repros, when looking for a donor cart the size of the ROM is the only thing that doesn't matter lol. So it's kinda the opposite.

edit: Picture for fun...
Image
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Re: Zig's SNES Repros

Post by Hobie-wan »

Ziggy587 wrote:
Troglodyte wrote:1. Which color cartridges were produced, and which games used these colors?


There was different color Genesis carts? That's news to me, I've never seen any before. My Maximum Carnage cart is black.


Guess the red one was limited. There's one in this picture.

http://img313.imageshack.us/i/dcp20421kj.jpg/
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Re: Zig's SNES Repros

Post by Ziggy »

Wow. I've never seen a Genesis cart that wasn't black.

So I was doing some thinking about the Genesis repros, and I think I figured it out. If you open up a standard Genesis game that only uses one EPROM and no save function it is VERY simple. It's just the EPROM, a resistor and a capacitor on the PCB. That's IT.

So looking at it, each leg of the EPROM goes to a pin on the cartridge connector. The resistor and cap are just there to protect the chip from the 5v source. So it's basically just each leg of the EPROM getting wired to the pins. And being that there's more pins than legs, not all the pins are used.

Looking at multiple carts, there's just minor differences. On some carts, a few legs will go to different pins. I am assuming THIS is why Bare Knuckle 3 wasn't working on the cart I used. I'm kinda just thinking out loud here, but does this make sense to any one else?

So since I've heard that you have to use a donor game that is the same size or bigger than the game you're trying to make, I'm left to assume that the Genesis console communicates with the ROM slightly different between different size EPROMs. I'm gonna try putting the EPROM I programmed on another cart and see if it works, but if it doesn't, I'm clueless as to which cart I should use for what game. I really can't find anything on the interweb.
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Troglodyte
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Re: Zig's SNES Repros

Post by Troglodyte »

If my Mega Man cart works, that yellow tab will just get sprayed black, I don't mind having the slightly taller case

Well, I think most of us probably do. But I'm sure you are just using it for testing purposes, so more power to you! lol

There was different color Genesis carts? That's news to me, I've never seen any before. My Maximum Carnage cart is black.

Yes, as mentioned before, the red one is a sort of special edition / limited release on both the SNES and Genesis.
How limited? I have no idea. My Genesis cart is red, and I don't believe I own either Maximum Carnage variant on the SNES.

Actually, it wont work at all. The tabs on the inside that hold the PCB in place are different, so you wont even be able to insert the Metroid PCB in the Doom case.

Your right, I didn't even think about that.

Why Doom? I did a lot of reading on the matter when I was building my first Star Fox 2 cart. Did you get Doom because you wanted the faster FX chip? Doom doesn't have SRAM so you can't save the high scores and whatnot :(

The FX chip in Stunt Race FX is perfectly fine for Star Fox 2, I would just use that as a donor (and I do).

Yeah, I know you just use Stunt Race FX as do most people. But I too have done extensive reading on the subject, and it seems since Star Fox 2 was designed with the Super FX 2 chip in mind, that it performs at a perhaps slightly smoother frame-rate when using a Super FX 2 game as a donor cart. The only two with the correct EPROM size are Doom, and Winter Gold. While Winter Gold features SRAM, the game was released in Europe only and is very rare, in addition; the high scores are the only thing that have saving capabilities on Star Fox 2. Besides, I plan on using several donor carts, as well as experimenting with overclocking, to see which method ends up producing the best overall results. If Doom ends up yielding the best results, then I will likely purchase a Winter Gold cart to make my final version.

I'm gonna try putting the EPROM I programmed on another cart and see if it works, but if it doesn't, I'm clueless as to which cart I should use for what game. I really can't find anything on the interweb

Back to the main subject at hand; I'm really wondering why were bothering to try and find the right donor cartridges for Mega Drive games anyway. I mean, since they are so simple, as you described, why can't we employ a method similar to this?:
Reprogrammable Genesis cartridge
http://www.raphnet.net/electronique/genesis_cart/genesis_cart_en.php

I've had that project page bookmarked for quite a while, and simply forgot about it.
I hope that it helps.
Last edited by Troglodyte on Wed Jan 13, 2010 12:53 am, edited 7 times in total.
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Re: Zig's SNES Repros

Post by Hobie-wan »

Ziggy587 wrote:So I was doing some thinking about the Genesis repros, and I think I figured it out. If you open up a standard Genesis game that only uses one EPROM and no save function it is VERY simple. It's just the EPROM, a resistor and a capacitor on the PCB. That's IT.


Yeah. Granted I'm not making stuff like you are, but most SMS and GEN carts are dirt simple inside. Since I always clean carts when I get them, I've looked in plenty.
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Re: Zig's SNES Repros

Post by jfe2 »

Hobie-wan wrote:
Ziggy587 wrote:So I was doing some thinking about the Genesis repros, and I think I figured it out. If you open up a standard Genesis game that only uses one EPROM and no save function it is VERY simple. It's just the EPROM, a resistor and a capacitor on the PCB. That's IT.


Yeah. Granted I'm not making stuff like you are, but most SMS and GEN carts are dirt simple inside. Since I always clean carts when I get them, I've looked in plenty.


I clean all my new carts now too ever since coming to these boards! :D It's like a ritual when I get new stuff.
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