super mario 64 emulator pc glitching out

Note: frame numbers may or may not be slightly inaccurate, as I merely threw the. To make it a little easier to see, I downloaded the capture from NND and isolated the frames where the glitch occurs. If there is a reliable way to reproduce it ('reproduce' means at least 90% reproducible as consistently as possible), someone with an oscilloscope could probe different spots of the video circuitry (this is not necessarily the PPU itself) and see if they can figure out what's happening. My absolute firm belief is that it's something physical or electrical, and is not a 'quirk' or 'characteristic' of the CPU or PPU (thus cannot be emulated, but I've been wrong before) because what I see in those videos looks like brief 'video signal noise', and it's something I've seen on consoles as well as some arcades. I suppose another possibility is that it's purely something between the PPU and display (TV) that's happening, possibly at the voltage level or something relating to NTSC. Maybe it only happens on one of the CPU/PPU clock alignments? Uninitialized RAM? Who knows. Once it's doing it, resetting won't make it stop but powering on/off will. It also only seems to appear 1/3rd of the time when the console is powered on. The glitch is only really visible in certain areas of World 1-2. Grapeshot wrote:Well, I actually replicated this, with a completely different NES, TV, and cartridge in a different city. I had to do such in the late 80s/early 90s, so why is this such a big deal to people now? *shakes head* can't just be considered part of the whole actual experience of using the console. I don't know why things like 'strange anomalies' (see OP), blowing on cartridge connectors, turning the console upside-down, etc. I have found this to be the case for decades now you won't find the quantity of OCD people with any other console. I seriously don't know what it is about the NES/Famicom that drives OCD people to it.

Power-related issues, sure - I can't refute that possibility. This would also explain why such anomalies are not seen using emulators but only actual hardware. The older the carts (dirty/damaged contacts), the older the console (more worn the edge connector), the worse it gets - even slot-loading NESes with new/replaced edge connectors have this problem (sometimes the edge connector is too tight, as crazy as that sounds). Naturally every environment/situation is different, thus troubleshooting this is impossible. Such jostling/wobbling could be caused by wiggling of the controller cord, or even stomping of feet against a floor (vibration going up through the table, etc.). Sometimes jostling/wobbling can cause a single pin to lose contact (or possibly still have contact but the signal is not as strong) which can cause anomalies of sorts the results would vary depending upon what the entire system (CPU, PPU, and all other circuitry) was doing at that moment in time (we're talking microseconds here). My theory is that the issue has to do with bad pin/edge connector contact.Īs has been discussed here on nesdev many times over, both the classic slot-loader NES, the Famicom, and the top-loader NES all have problems relating to cartridge connection (I will be a dick and state boldly that anyone who tells you otherwise is flat out wrong) this has plagued the console since its existence. (I wasn't sure which subforum to post this in, by the way) Does this ever happen on your NES/Famicom? What causes it?įor all I know this has been discussed before, but googling this kind of thing is, of course, impossible. So.what is going on here? Of course no emulator does this. Second, this shaky video of a US NES playing back a TAS:ġ:10, you can see it above the 'WELCOME TO WARP ZONE' text. I've been looking on the internet for real hardware videos of SMB showing this and it's not easy to find anything, but here is what I got:įirst is this niconico video of some guy playing Mario blindfolded:Ħ:45~6:49 you can clearly see it around the middle of the screen. It also appears in SMB2 for the Disk System in the same manner. Power cycling the system can either make it appear or go away. However, it only happens on some 'runs' of the game. It's a bit hard to explain, but basically it's a one pixel/scanline tall, variable length line of 'glitchyness' that appear seemingly completely randomly during SMB gameplay, about once a minute on average on my AV Famicom. This little thing has been bothering me for some time now, so I though I should try to get to the bottom of it.

Super mario 64 emulator pc glitching out