nesdev.org

Oh no, dynamic logic. Thats my worst fear :s

So each n-mos has a well? Thats interesting, normally its the p-mos.

Does each dynamic gate have an inverter after it?

How about tracing out the clock circuitry first? That will give you the non-overlapping clock signals it uses.

Phew, Romhacking is back up. That developer manual is really interesting! Should be required reading. Maybe a Soviet spy took it... Has anyone ported a NES game before? I would imagine it would be really difficult as you would have to re-write most of it I know someone ported Sonic 1 to the 32X, but...

Did romhacking.net just go down yesterday? Good thing I downloaded that snes developers manual at work

I was going to suggest to put this site into the top post...

The wikibook is ok I guess for basic things, but is really incomplete Download MazezaM from here here This is a great framework for SNES program For the assembler you need WLA-DX There are tons of text files describing programming and the hardware. I think most of them are on Zophar's Domain. I have...

Yeah those MAME people are kinda shady. I guess they really love arcade games and want to preserve everything, even the old Mahjong clones. I think they also get a discount by sending a lot of chips at once. If I had to use fuming nitric acid, I would charge a lot! How do you dissolve the oxide laye...

I am glad people are still interested :) Supposedly you can get chips decapped and photographed for a few hundred dollars, I know they do this a lot for the MAME project. Also the photos will be high quality, so I won't go blind. This company looks good http://www.perfictlab.com/en/pages/mainpage.ht...

Instead of 8 chips, just use 4x 1MB EPROMS. There are tons on ebay or http://www.futurlec.com @sdm Which game is that? I haven't seen 6MB before, it probably uses some strange sort of address decoding. I think your website (http://www.romlab.prv.pl/) has a lot of great info! BUT you seriously need t...

Making a game system on an FPGA always sounds like a fun project, but just doing the video hardware would be extremly hard :( Also we already have have those Duo clone things for cheap, and you can't really sell something like that without someone starting an argument here So basically the only reas...

Well you arn't going to get very far without any electronics experience :( For rapid development, SRAM would be the best. A single 1MB chip would work perfectly Since it needs to be powered to hold data, leaving it in the SNES would be perfect. You can hold the system in reset while it is programmin...

What if I were to sell a piece of bread shaped like a Game Genie? Is it still considered a "game enhancer?" :P What if you sold a Game Genie with a likeness of the Virgin Mary on it? What a dilemma for Ebay! Well the NES one lets you do like 5 patches, but the Game Cube one basically lets...

I put Mega Man X on my flash cart, and it seemed to work fine playing through the first level with only 1.5 MB Some games display a nasty message when you start it up with the wrong SaveRAM size. Maybe this is the only thing they look for, since it depends on hardware only and ROM mirroring is easy ...

By all accounts your game should work without any extra padding

But if you are using a 2MB chip anyways, you might as well duplicate the last 512k, it wont hurt

I am curious, which games DO need mirroring?

Hmm the 2nd one does sound really good. But I mean playing Sonic2 it sounded off without the cap, like the ring and jump sounds. The new circuit I made did sound way better then the crummy built in one tho. Now for the SNES, you shouldn't leave the filter out. Its called a reconstruction filter, and...

The SNES audio is digital and generated by a DSP. I think they all use the same DAC chip, a 6379A, so it will all sound the same. You could make a high quality DAC and filter circuit for it on a little board. This guy made a digital audio out http://gamesx.com/wiki/doku.php?id=av:snes_sp_dif which i...

Thanks man! My first design had a USB port built in, but that caused way too many design problems. Plus you need your computer right next to the TV! Flashing is fast, about 2 mins MAX to reprogram the whole chip. Should be less then a minute for a smaller program. Debugging is an interesting idea! I...