Make your own NES! Really!

Includes Atari 2600, Nintendo 8-bit, Sega Master System, MSX and more!

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dudegladstone
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Post by dudegladstone »

Has anyone ACTUALLY ever done it? Has anyone ACTUALLY ever made a cart of multiple ROMs? I have never seen anyone bragging about it, but somehow, several Honk Kong companies have been able to do it for pennies. Theoretically, if we had a ROM image of a multi-cart, could we burn it in it's entirety to one or two or three or whatever EEPROMs?

Excuse the poor drawing, and I know the highest address line or whatever is probably in the wrong spot, but hopefully you'll get the picture and tell me what's wrong with it.

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...where all the switch points are connected to a DIP switch or a single throw quad pole if such a thing exists.
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NESJohnny
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Post by NESJohnny »

I have one of these clones, it works fine but the sound sucks. It's prone to crashing too. Any suggestions for a similar but good sounding/well built NOAC? My area's devoid of video game shops :(
Yes, I AM a bad enough dude to save the president!
gannon
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Post by gannon »

Just connect all the lines of the eproms except power, and then use the dip switch to switch power for each set of chips.
MM007
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Post by MM007 »

gannon wrote:Just connect all the lines of the eproms except power, and then use the dip switch to switch power for each set of chips.
Yes, that is what I suggested.
Warranty-Voiding fun!

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peppers
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Post by peppers »

you could always just stick a socket in there and swap out the chips for the game you want
Im done here
MM007
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Post by MM007 »

dudegladstone wrote:
...where all the switch points are connected to a DIP switch or a single throw quad pole if such a thing exists.
That likely isn't necessary.

..........................................................................
+5---o__o------+-----PRG ROM 1---------+............
.....|..DIP..........|....................................|---+.......
.....|.................+----CHR ROM 1----------+....|.......
.....|............................................................|.......
.....+-o__o-----+-----PRG ROM 2---------+....|.......
.....|..DIP..........|....................................|---GND...
.....|.................+----CHR ROM 2----------+....|.......
.....|............................................................|.......
.....+-o__o-----+-----PRG ROM 3---------+....|.......
........DIP..........|....................................|---+.......
.......................+----CHR ROM 3----------+.............
Warranty-Voiding fun!

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Epicenter
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Post by Epicenter »

NESJohnny wrote:I have one of these clones, it works fine but the sound sucks. It's prone to crashing too. Any suggestions for a similar but good sounding/well built NOAC? My area's devoid of video game shops :(
NOACs are HK junk, made in bulk on an extremely low budget. Each one acts differently, the sound can be godawful on one, almost tolerable on another, but that one will have video problems or refuse to run games without crashing. In one way or another, they're all uniformly bad.

You are better off using the REAL ICs from an NES/Famicom to build anything, the NOAC/FOAC is worse than a bad emulator.
NESJohnny
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Custom NES

Post by NESJohnny »

Epicenter,
Thanks! That makes a lot of sense. I was thinking of getting the Ybo Neo-Fami famicom clone. It's gotten pretty good reviews, having a good A/V out and whatnot. I could just build a custom case for it (it's awfully small), and rewire the controller inputs to take the traditional NES controllers. The horribly unergonomic rectanglular joystick is somehow nostalgic and charming.

http://www.toysnjoys.com/fc.html Here's the cheapest I've found it for.

http://www.nesplayer.com/pirates/neofami.htm One of the good reviews I found on it.
Yes, I AM a bad enough dude to save the president!
dooda
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Post by dooda »

i've seen a lot (and i mean it "a lot" actually stocked in
freshly opened boxes) in those electronics-imported-chinese-
stuff stores. i dont know if there are much stores of that
kind in the 'states but i've seen them in san diego.

they look poorly manufactured and sometimes really bad
packaged only reason i have gone to those stores is because
they sell boxed n64s, classic games, and sometimes even jap stuff!

oh and also ontroller extensions at bargain price (arund two bucks)
NIB controllers (although they don't guarantee it too work)
but hey! they are meant to be thrown apart anyway!

ok... ...must finish ps to pc controller adapter... ...must not sleep...
can't believe i've finished contra 3...
now i need a new purpose on life...
ok lets go to final fantasy 3
SgtBowhack
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Post by SgtBowhack »

You don't need to have multiple chips to use multiple ROMs! You just wire up address pins to the switches. For example: Four mapper 0 ROMs:
You have a 128kbyte PRG ROM and a 32kbyte CHR ROM. The top two address pins of each are attached to a switch. Those two switches will then select between the four games (if written sequentially properly).
BTW, yes, padding will work (i.e. you can use two 128KB ROMs) since you can just ground some of the address pins so the NES won't see them anyway.
NESJohnny: Dang. Those are some nice prices. The NeoFami costs that much in Japan too, so I'd snag it :) I've got two Famikonyarou systems, and they're basically the same as the thing that I started this thread with in a case, and with a cartridge (yes, an entire cartridge with the pins and everything) soldered into it. They're pretty crappy build quality but they work perfectly well. So I expect these things to as well. I'll probably be picking up a couple if anyone else is interested. I'm expecting them to cost around $15+$2 shipping or so (I'm just gonna send them to family in the USA first probably). We'll see though.
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Post by Guest »


NOACs are HK junk, made in bulk on an extremely low budget. Each one acts differently, the sound can be godawful on one, almost tolerable on another, but that one will have video problems or refuse to run games without crashing. In one way or another, they're all uniformly bad.

You are better off using the REAL ICs from an NES/Famicom to build anything, the NOAC/FOAC is worse than a bad emulator.
I couldn't put it more succintly myself. We should all praise Hiroshi Yamauchi for the strict quality control methods he imposed on the factories making his Famicom chips for their reliability, stability and consistency. The various Famiclones I have seen recently run the gamut of problems, leading to rather high levels of returns and customer dissatisfaction. The cartridges too are tiny and crappy, failing often. Try an MMC5 game on them and watch them fail.
SgtBowhack
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Post by SgtBowhack »

What does the cartridge size have to do with it? Most pirate Famicom carts are the same size as regular ones...
And as I said before, Famiclones really differ greatly as far as quality is concerned. The ones I've gotten recently have been pretty much indistinguishable from AV Famicoms as far as quality is concerned. If only the controllers didn't suck...
I admit that quality control is an issue though :) The NeoFami is quite nice though. Made for a Japanese company so I would imagine quality control is high- since Japanese stores pretty much take back anything no questions asked. If they all started failing, the store's credibility would be in trouble which would then be thrown back at Gametech. The Famikonyarou is basically your typical pirate Famicom though with a neat little case. (Still, mine seem to have excellent quality and haven't had any trouble playing almost anything on it yet- there's one cart I'm not sure if it even works because I bought it from a flea market)
Great Hierophant

Post by Great Hierophant »

The Neo Fami has compatibility issues, on its product page it gives a list of what works and what doesn't. Chief among them, inexplicably, is the inability to output extra sound channels found in some Famicom cartridges. I say inexplicably because the Famicom merely sends its audio output to the cartridge for mixing on one pin and the enhanced sound is sent down the other pin. If there is no extra sound hardware inside the cartridge the two pins are connected together and the sound is output without any more ado.
SgtBowhack
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Post by SgtBowhack »

Yeah, but the incompatibility is quite low. I didn't know about the lack of the sound channels being output... that's pretty shady. I agree that I can't think of a reason why they'd do that. It's pretty easy to rewire the system to fix that though. Actually, I've never looked inside the NeoFami but since the audio out on the Famikonyarou is on a different board from the NOAC it's really easy to get access to (just solder the wires onto different places if it's not set up right)

Then again, Ganbare Goemon Gaiden 2 is strangely missing from that page (and is one that fails to get past the title screen on my Famikonyarou systems and my friend's NeoFami)...
Great Hierophant

Post by Great Hierophant »

So is the number ot titles they tested. Remember the Famicom has up to 1,200. Does the Famicom Disk System work? How about Castlevania III?
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