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Watching game grumps when I was younger and seeing the character like disappear or flash. I always wondered, "is it supposed to do that, is the recording broken?

This is great! Are you planning on releasing a hack that fixes these bugs? While you're at it, I'm curious if some of the other bugs are fixable... like being hit by invisible blocks in the yellow devil fight. I'd love to one day play an actually not buggy version of this masterpiece of a game!

For the stage select screen could you have made the second split interrupt one scanline sooner too?

Can you dive into SNES like you did with the NES? Or are you solely focused on the NES? Nice work regardless!

Super interesting watch, I don't know anything about the coding stuff, but your explanation was enough that I could at least get the gist of it and understand to a degree. Had always wondered about that black column and the stage select scanline, but I don't think I'd noticed the menu one before.... that said, I wonder if it's a similar issue that causes another menu error. I've only really noticed it in specific stages, usually gemini, doc gemini, or one of the wily castle stages, but the menu will break and only display the top third or so with a very visible scanline and then repeat that same portion of menu down to the bottom, making it... annoying, we'll say, to navigate it if you don't know the menu quite well. Are you familiar with what causes that one, and is it a similar type of issue?

So are there other crowd secrets? You gotta do a video on that because the developers have said that “there are so many secrets in that game.”

2:00 "You may think this request is ridiculous" Sounds about normal, sadly.

i fucking adore your channel and i’m so excited.

This was dope. Mega Man 3 was one of my favorite games growing up. It's what I'm using now to figure out if I got my timing code correct for MMC3 interrupts in my emulator. I'm still at least a pixel off with the stage select screen. 😆 The top right pixel for the Magnet Man frame is occasionally white. The rest of the glitch lines up. It just starts glitching earlier than it should. Some day I'll get the whole PPU/CPU/Mapper timing thing down.

I'm sorry I'm so unobservant.

You know about the SNES port by infidelity? He fixes those glitches too

Where can we grab and apply your code patches? RomHacking?

Thank you. I love learning how game bugs work.

MM3 was actually my first megaman game i always thought that issue with the menu was just because i had a glitchy cartridge... because i got it from a random back alley 2nd hand store all these years later... IT WAS THE GAME THE WHOLE TIME!?!? O.o

Wait why did they put 101010 in the first PPUAddr_2006 write anyway? Couldn't they have avoided that part of the problem by writing 001010 instead…? Because the issue isn't that the high bit is 0, the issue is the middle bit _isn't_ 0.

Regarding the topmost bit being set to 0, this is what the nesdev wiki has to say: "Note that while the v register has 15 bits, the PPU memory space is only 14 bits wide. The highest bit is unused for access through $2007. "

This isn't Mega Man related, but the NES game "The Immortal" would lose it's color and only show black and white on my NES. In fact, it spent so much of its time in B&W mode that I didn't know it was a color game for years until it "glitched" into color (I didn't have the box or manual to see screenshots to know something was up). Ever heard of that or know why? A dirty pin on the cartridge?

Originally The stage select screen was different. iirc Magnet Man stage was in the upper left corner, Snake and Needle Man stages are reversed and Spark Man stage was in the bottom middle. They must of changed this early in development but there is some evidence of a possible Doc Robot Magnet Man stage in the MM3 ROM. You can also tell just by the portraits themselves. (some don't align properly and it just looks like Magnet Man should've been on the left side of the screen instead of the middle bottom) So maybe the line glitch happened when they were changing the sprites for those portraits? Who knows?

This is excellent. I've always wondered about why Megaman 3's robot master select screen had a glitch. Understanding more about Megaman 3 was in development hell yet managed to still be a great game helps you appreciate the game even more. There's a ROM hack that fixes these bugs and adds some other features, like cycling the gained abilities with the otherwise unused Select button. I love Megaman 3!

I'm pretty sure nobody else has cracked the password system. I'll let you in on a secret...

Me, the guy that always noticed the black bar on the side of the screen for this and other NES games but didn't think much of it.

wake up bab;---- actually nevermind just stay asleep you wouldn't like it but i'll be back in 28:18

Wow, that interleaved Address/Scroll write is batshit insane, but makes sense with your explanation of v/t (and considering the MMC3). This video is ostensibly about Mega Man 3, but really, it's an amazing overview of the PPU internal Registers! (And also about the debug features of Mesen. Developers would've killed for modern day tooling in the 80's, one can imagine what would've been possible)

Mega Man 3 has always been my favorite Mega Man game.

As simple as Nes/Famicom games look, they can be incredibly complex. I would say they were likely the most complicated console games of the 3rd generation. What's crazy is that we only saw 3 helper chips throughout the Nes's lifespan, but there were so many more. I believe all major 3rd parties had their own chips they used to enhance Nes's capabilities. Did you know there was even an FM sound synthesis add-on just like Sega's Matk III and Master System? What really sucks is that because of Nintendo's strict policies on 3rd party distribution, we often got inferior games. In many ways, we really got hosed... Fun Fact- Did you know some early Super Mario Brothers/Duck Hunt carts had Famicom to Nes converters inside of their cases? Nintendo didn't make enough Nes carts during the systems launch. So, they slapped Famicom carts in with a converter and sold them.

"Based on the spelling in these comments, we can verify that they were written by a real programmer" That one felt personal

I always look forward to your videos! You always explain them in a way that is interesting and easy to understand

All Master System games that scroll horizontally mask off that left side.

Thrilled to see a new DG video! Love this stuff man.

Now figure out the glitch in P.O.W. when using the gun on the first boss.

This dude just unglitched Mega Man to death.

It's ok that you made me notice these things :0

SMB3 has all of these problems and none of the solutions. New tiles for scrolling are loaded in on the edge column without masking, there's the same graphical "noise" on the transition between the game window and the status window at the bottom, and the various scrolling bits like the match game also have timing issues. What's worse, SMB3 was a very late NES game and it was made by Nintendo themselves. They should have known better, but as it is, SMB3 is kind of sloppy in a lot of ways despite being one of the best games ever released on any system.

Donate now to help those affected by Copy/Paste issues

I love how this demystifies old games quirks. It's nice to see it working, only took 35 years to debug!

Okay, I admit it, I bought this game when it first came out and only now noticed the "M" glitch. $52.50 for MM3, that was a lot of soda cans.

Does anyone know what the acronym MMC stands for?

Xmas 1990 my brother and I got Mega Man 3, and we loved the heck out of it! All six games are incredible; some of the best of the NES.

Amazing explanation and fix! Thanks for the video!

Wake up babe new displaced gamer video!!!!!!!

I'm surprised that with Nintendo's quality certification program, they didn't seem to have a problem with glitchy graphics.

Thank you so much for this video! This glitch was so annoying back in the day!

loved mega man 3, was the first mega man i had

Thanks for pointing out several graphical oddities that I won't ever be able to unsee (and great video)

Dragon Unit for NES has a VERY noticeable bug if you blink you will miss (maybe not). Their 'fix' for the USA version is hilarious. Too bad you only analyze well known franchises.

I love these explainers (and fixes!) for glitches for these ancient games. Thanks. 😊

I love the 6502

I've had some experience installing digital games on jailbroken consoles and between installing the game, updates and DLC it's more annoying than older titles

"Hard Man"

Can you imagine if the original developers had that emulator back then. At the very least, I'd like to think that it would've led to fewer glitches and more games releasing on time, but who knows.