nesdev.com

Obviously it's not linear because if it was, it'd have estimated like $200k. Just pointing out that it's only been up for three days, and even then, it still estimates it gets pretty close, within a few thousand. Way too early to just write it off. Using a few points of data and filling in the next ...

I'm not running the Kickstarter, but I am helping!
I don't think I have the skills or bandwidth to make the software work! Haha

The Kickstarter is live!

https://www.kickstarter.com/projects/an ... s-visually

Sounds like the internal oscillator might be out of spec (assuming that is what it's running from). I looked in the datasheet and it has this note: The SuperCIC/SNESCIC always run off of external clock, so the internal calibration is irrelevant. (Also, different SNESes use different clocks: the ear...

I've seen more than one person asking for help with multicarts, so I figured I'd write up a general guide to help beginners out. If you want to check it out feel free, and any criticisms are welcome. I wrote it in a few hours so I probably either forgot something important somewhere or worded someth...

I've found that it's actually required to tie /CE to ground for most EPROMs due to timing issues. Not doing so often results in graphics glitches interestingly enough. Sorry for bumping such an old thread - but is this true? I had never heard of that before. Is that why /CE is normally tied to GND ...

I just would much rather use 3 cents worth of combined parts instead of one 50 cent part. Well, nowadays you can get rather inexpensive 74'1g04s too. Those smaller packages weren't an option during the NES's commercial life, however. Maybe NoA really just wanted to use parts where if there was a pr...

My best guess, without any good evidence, is resistor-transistor logic had some kind of compatibility problems. Maybe it was with the assembly method (can you wave solder a TO-92?), or maybe it was timing problems. Wave soldering TO-92's doesn't pose any problems, unless wave solder technology was ...

For ANROM, couldn't you just make a simple logic inverter for the R/W signal with an NPN, and wire it up to the previously-permanently-grounded /OE pin? That seems way easier than using an entire 16-pin logic chip to invert one signal. Why would Nintendo use that instead of just a transistor and two...

Games originally shipped on AMROM boards explicitly do have bus conflicts; games originally shipped on ANROM don't; games on AOROM might or might not. Is there some newer documentation about which AOROM games have issues with having bus conflicts, besides Wheel of Fortune and Double Dare? Are there...

Krzysiobal made a schematic of a Sonic 3 a while ago here. There are PCB p0rn pictures on the begining of that same thread. Hope this can be usefull. Thanks for this, I did see this a while back and looked at it a bit again yesterday but missed the schematic. Though, I think that schematic raises m...

Ok, thanks for that. So, going by this which was said earlier: For games with 2MB of ROM or less, there isn't an overlap, and there you would use a 74xx chip just to invert the chip enable signal for one of the ICs =P (so one gets enabled in the $000000-$1FFFFF range and the other in the $200000-$3F...

I'm having trouble finding the circuit, and I don't actually have a Genesis cart like that to check unfortunately. But even then, shouldn't this still work? Or do 16 Mbit games not use $A130F1 to pulse the /TIME signal? Also, one game did show save data when booting it up for the first time, it was ...

I made this circuit but I'm having some trouble holding some saves - it looks like the trend is games that are greater than 16 Mbit do not have any issues, but 16 Mbit and less do. I don't see why that would be a problem here, though. I'm a bit stumped.