That part is kinda interesting. It appears the FM sound is missing. If this were to happen on a real Mega Drive, that means there is a problem with the Yamaha YM2612 FM synthesis chip.
ok so simple explanation: sonic 1 has a built in exception handler which works like this: whenever unintended/undefined instructions are attempted to execute the game freezes and prints out the memory location where shit went down so the coders would have easier time fixing bugs in the finished game there's very few situations where you can actually get this to happen but when you corrupt the game rom it becomes whole lot more prone for illegal instruction messages later games like sonic 3 didn't have built in exception handler so corrupting it usually results in game going apeshit before freezing or just straight up freezing
in Sonic three sometimes the game goes into the SEGA screen when something goes really wrong, and also in sonic one you can try to make the game progress with the illegal instruction with the C button although it might do some glitchy stuff
@@ChoboUnjeon It is. I have the open dissasembly, and I know the location of the crash handler text. I located it many times and I still didn't see aby error code, except for the "LINE 1111 EMULATOR" and "LINE 1112 EMULATOR" texts (I'm talking about the 1111 and 1112). The error codes must be put in by the game od the crash handler code.
14:09 In the corruption before this one, the act clear music sounded like it had Eggman's theme's intro noises playing along with it...now...*this* is scary; Is this Eggman's act clear theme? It sounds like he took ove-- *SEEEEEEEEGAAAAAAAAAAA!*
ILLEGAL INSTRUCTION means that the program ran an operation resulting in an invalid or undefined output. Such as writing to a part of the memory which overwrites another routine required for the program to run. This results in the program crashing. IE, if you see that message, the game crashed.
@@Cee4Four I am not a programmer but usually codes have 2 functions: Either a generalised indication of the class of error or the direct address in the memory that caused the error
0:58 *Game: “Loads up title screen”* *The corruption:* 1:17 *The current run of Sonic 1 corrupted: “Starts off fine”* *Sonic: “Dies”* *Also the current run of Sonic 1 corrupted: “Has a seizure and a stroke all at once”* 2:19 *Not gonna lie. The colors for the thing that Sonic appears in on the title screen make it look better than normal.*
Stable corruptions: 4:25 And 6:26 (the last stable one has one bug the bug is right here: 7:20 but the last stable one has no notes, only beats and chiptune notes
11:42 Sonic.exe official 7:22 casino Night zone 14:09 Eggman want stay whit *SEEEEEEEEEGGGAAAAA* 14:22 weird bird 4:20 Ting 3:33 Hah now are the monitor 6:06 fast special stage 0:01 start the weird
You should corrupt the Sega Saturn bios. :P Pretty funny you decided to corrupt Sonic. I could probably corrupt it just by downloading a disassembly and simply changing tons of code but it'd be more time consuming. It's also easier to do so on a actual Genesis by tilting the cart, but I don't want to ruin any of my four Sega genesis doing so. xD
The emulator this guy is using is what prints the "Illegal instruction" The illegal instruction error means that the Motorola 68000 had an instruction that does not exist.
There’s text that says “Illegal instruction” which shows that SEGA KNEW people would try to modify Sonic 1, so they stamped it around to let the hacker know.
When I was a toddler, I was playing this. I randomly got an illegal instruction. Then I cried for half and hour because I thought I broke the law. *Illegal* instruction .
Most of the corruptions seen here can actually happen on the real Mega Drive, these happen when the cartridge get's pulled out slightly while the game is running.
![[Zap] Sonic the Hedgehog - Corruptions](http://i.ytimg.com/vi/GPkew3wi934/mqdefault.jpg)
6:35 , damn that music!
That's so cool music
I like it
ネルソン Sonic the NEShog
TailsFox12 i thought Tails spoke english
@@stickystudios5318 sounds more like a gb or gbc...not that theres a difference.
6:41 the beat really goes hard
Agree.
Agree
Agree.
Agree.
It sounds like if green hill zone was in beta testing
7:53 scared the everliving shit out of me
Same! (Reply is from a 15 year old)
no swearing
@@Le_epic_eclipse fuck.
@@Le_epic_eclipse Get off your mom's iPad if you can't handle the internet kid
7:55 Sonic has passed act... 1?
6:35 love that drums
x2
x3
x4
x5
x6
6:33 that is actually a sick beat!
That part is kinda interesting. It appears the FM sound is missing. If this were to happen on a real Mega Drive, that means there is a problem with the Yamaha YM2612 FM synthesis chip.
@@UNIX32bro u are the definition of complicated
@thedebbiewinner
if you think thats complicated then try understanding the process of making fissle fuel
There ain't nothin' more horrifying than a video game corruption.
same
Fucking true. Nightmare fuel.
Osom Legends I Got One To Play Sonic 3 Music In 8 Bit
I agree. For some reason, they've always freaked me out!
+ChaosMass Razrhax Same..
0:40 Green Hill One.
Wow.
Green H(ell)ill One One
@Elton Lelo Android 2020 more like act *ONE*
ok so simple explanation: sonic 1 has a built in exception handler which works like this:
whenever unintended/undefined instructions are attempted to execute the game freezes and prints out the memory location where shit went down so the coders would have easier time fixing bugs
in the finished game there's very few situations where you can actually get this to happen but when you corrupt the game rom it becomes whole lot more prone for illegal instruction messages
later games like sonic 3 didn't have built in exception handler so corrupting it usually results in game going apeshit before freezing or just straight up freezing
in Sonic three sometimes the game goes into the SEGA screen when something goes really wrong, and also in sonic one you can try to make the game progress with the illegal instruction with the C button although it might do some glitchy stuff
0:41
"Green Hill One"
Well,it is the first Act,so it kinda makes sense?
LOL how does it know how to SPELL the number? I guess the genesis is smarter than it looks!
The Z got voided
7:18
Idk why it looks like the start of the creepy part on a Sonic.exe game
Sonic: *kills one enemy*
Game: NOPE, YOU’RE GONE
SONIC ITS ILLEGAL TO WALK FOR MORE THEN TWO SECONDS,WALK ON A BRIDGE, AND APPEAR ON THE MAIN MENU AND NOW YOU CRASHED THE GAME
Ethan Bitz nice dolan pic.
@@Schnort thats not dolan
@@Schnort oof. I thought you were dead.
Timestamp?
0:54 He touched an enemy that’s why
Sonic: *enters level*
Game: _That's illegal._
Sonic: 'walks two steps'
Game: Wait, that's illegal
Also game: *'illegal instruction occurs'*
well of course. He was supposed to RUN and not WALK, so this is an "illegal instruction"
1:35 Behold, the stuff of nightmares
Jump crash
CHODE SONIC
0:15 PRESS START BUTTON, unused
DaEasyGamer Gaming congrats your the first person to do the research
@Toby Dominus it went unused due to some coding mistake
At the right have *EGA* 1991... Lmao
you can even enable it using the ese sonic editor 2
You know you can just press "C" to bypass the "Illegal Instruction",right? But,it turns the life counter into "DFHJLN EGIKMO"
DFHJLN EGIKMO, orginal character DO NOT STEAL.
I swear I'll forgive everyone for making jokes about me if someone turns that into an OC.
Shadow The Hedgehog REAL sonic forces character xD
DFHJLN EGIKMO AND HUSADGA DSHAU IN DFHJLN EGIKMO THE HEDGEHOG 2
What happens if DFHJLN EGIKMO has the Chaos Emeralds?
Best Oc ever made
4:20 why does the bass actually sound actually really good at this part
nice
because its on 4:20
13:00 Oh look, it's the Game Gear SEGA logo!
The Game Gear SEGA chant!
I've always wondered why the "illegal instruction" error never shows up on-screen correctly without some sort of "interference"
Maybe because that thing at the end is the program code.
You mean the $[numbers]? I think it's some sort of error code
@@ChoboUnjeon It is. I have the open dissasembly, and I know the location of the crash handler text. I located it many times and I still didn't see aby error code, except for the "LINE 1111 EMULATOR" and "LINE 1112 EMULATOR" texts (I'm talking about the 1111 and 1112). The error codes must be put in by the game od the crash handler code.
It's on here 3:58
How bout illegal instruction at 3 am?
1:30 so horrifying 😥😥😥
4:39 , the background looks good, with errors but good
Sonic is in the background Mountains
The ground is wrong
Push the errors down, put the montains less glitched, ¡BOOM! Oh, yea and remake the music. ¡Oh! And make the ground more down, Oh, and-
It’s the 8 bit Green Hill Zone layout
14:09 In the corruption before this one, the act clear music sounded like it had Eggman's theme's intro noises playing along with it...now...*this* is scary; Is this Eggman's act clear theme? It sounds like he took ove-- *SEEEEEEEEGAAAAAAAAAAA!*
Imagine if the Sega sound played when you completed an act on a stage of Sonic 1, lol.
New EXE S3g4.html
ILLEGAL INSTRUCTION means that the program ran an operation resulting in an invalid or undefined output. Such as writing to a part of the memory which overwrites another routine required for the program to run. This results in the program crashing.
IE, if you see that message, the game crashed.
Samus Aran thanks for help
What about the code or number at the end of the illegal instruction
@YungLambo2019 ive been wondering about too
@@Cee4Four I am not a programmer but usually codes have 2 functions:
Either a generalised indication of the class of error or the direct address in the memory that caused the error
@@jabrax thank ive subbed for the help
4:44 the zone actually looks kinda good
it looks like 3d
That should had been implemented in Sonic 1.
ikr
Ur crazy aren't you
@@user-pu8ft6cq6k no u
0:54 I guess the game didn't want you to kill the fish.
Gojira 2016 WELL FUCK IT
Yeah don't hurt the poor fishie.
Actually he was going to get hit.
Sir David yes he was
No it's because killing a fish is illegal.
The end of the Level Clear theme at 11:53 is cool
Yea it sounds more epic
4:18 LOL soft reset.
YOU PICKED THE WRONG PART FOOL!
9:16 My Favorite part 😂😂😂😂😂😂
Sonic.lime
Welcome to Hell, buddy
Sonic.Key lime pie in your cartridge.
*h e l l*
Sonic exe but it is a more believable story.
0:58 *Game: “Loads up title screen”*
*The corruption:*
1:17 *The current run of Sonic 1 corrupted: “Starts off fine”*
*Sonic: “Dies”*
*Also the current run of Sonic 1 corrupted: “Has a seizure and a stroke all at once”*
2:19 *Not gonna lie. The colors for the thing that Sonic appears in on the title screen make it look better than normal.*
Any Glitch in Sonic 1: *exists*
The Game: "I dunno man, seems pretty *ILLEGAL INSTRUCTION* to me"
0:54 touching a brige is illegal
killing a fish is illegal
Mariann Mariann touching a fish is illegal
You guys are dumb it is called a masher
@Hylon Taylor it is illegal to not know a joke
@@hylontaylor8990 it's the Chopper,not the Masher.
1:17 is litteraly creepypasta material
11:53 SONIC HAS
PASSED
act. 1
Score. (420) xD
Kermit Teh Frog Channel
Smoke FEST everyday.
That sounds sick the tune that plays
@@glace4222 wtf
Time bonus: 10000
Ring bonus: 7600
6:28 this sounds ok and the graphics are not broken, the songs actually sounds like beta songs for the game
It sounds like a "sing along"
@@Hyacinthus623 I was talking about 6:33 if u thought I was talking about the "Sega" intro
@@Serious5GamingS5G yeah like its a instrumental that you sing along
The FM synth is missing. (Yamaha YM2612)
10:17 _Green hill but everything is gone with eggman or Dr robotnik being hit_
6:37 a calm version of the green hill zone theme :)
me when I can only hear the pcm drums and the psg channels
SONIC HAS BEEN GLITCH AND BEEN CUT IN THE FACE! AND THE MUSIC IS KEEPING SAYING BOOM BOOM BOOM BOOM BOOM!
10:48 cuando te mueres en el hospital wey XD
:v
*no sonic black screen is gay and illegal*
Tacos
Stable corruptions: 4:25
And 6:26 (the last stable one has one bug the bug is right here: 7:20 but the last stable one has no notes, only beats and chiptune notes
6:54 the music here actually is cool
Let's play Sonic 1! Oh, wait, Sonic is to busy to play because he is destroying Eggman. 10:15
6:32 8 bit music on a 16 bit console
9:03 black screen of Death
11:42 Sonic.exe official
7:22 casino Night zone
14:09 Eggman want stay whit *SEEEEEEEEEGGGAAAAA*
14:22 weird bird
4:20 Ting
3:33 Hah now are the monitor
6:06 fast special stage
0:01 start the weird
2:02 "Okay everyone! Here we go!"
"Wel-come too-"
*Someone makes the wrong note*
"CUT! Who took that silly turn!?"
0:24 That scared me XD
Ah yes, I love that old internet horror story called sonic.executable
Sonic.pc, sonic.free, sonic.zip, sonic.png, sonic.pfp
I’m gonna have to execute you. Sonic.
Started as a screamer
sonic: does anything
the game: wait, that's illeagle
Watch out Sonic! You are now in the Glitch World!
7:26 Played sonic 2 too much? :D
6:34 wow is this supposed to be a remix? best corruption i have ever seen
6:33 sonic for the Atari or whatever it was
Atari isn't 9-bit,probably
6:46
It's my jam!
I'm not joking I love it
th-cam.com/video/xUijOacdP5E/w-d-xo.html Here's the closest thing to that.
The McGuinnessExperiment thx
1:31 oK, that is by far the most terrifying thing i've ever heard from an illegal instruction crash
Ok fair but what about 11:00?
0:54 This is illegal you know.
It looks like everyone drank too much caffeine at 5:42!
It's awesome how the game rom starts fixing itself xd
You should corrupt the Sega Saturn bios. :P Pretty funny you decided to corrupt Sonic. I could probably corrupt it just by downloading a disassembly and simply changing tons of code but it'd be more time consuming. It's also easier to do so on a actual Genesis by tilting the cart, but I don't want to ruin any of my four Sega genesis doing so. xD
I don't think cartridge tilting breakes the console
13:10 Sonic fart
🤣🤣🤣🤣🤣
YOU SUCK
What?
Excuse you, Sonic!
0:39 "Green Hill One" Makes sense.
The emulator this guy is using is what prints the "Illegal instruction"
The illegal instruction error means that the Motorola 68000 had an instruction that does not exist.
This can be also printed on console tho.
@@nil8659 oof I was using a emulator then I got a random illegal instruction
8:49 god,I LOVE playing the game made by “l,,’ “
10:43 sonic the invisiblehog
The first title screen corruption actually ruined the entire Sprite that you see press start button on it.
3:21 best looking green hill zone
There’s text that says “Illegal instruction” which shows that SEGA KNEW people would try to modify Sonic 1, so they stamped it around to let the hacker know.
6:41 beta green hill zone
Music: Updated
0:24 Sonic walks 2 steps 0:25 game crashed
sonic: *does anything*
the game: you weren't supposed to do that
1:32 Ben is finally starting to get into our brains.
9 Illegal Instructions
2 Line 1111s
the new ripoff of 911 line 1111
Maybe they were pressing C
0 address errors (I think)
@@moelester9902 there is 11 of those,actually.
Sonic: The entire corruption in this place is such a pain in a butt. 😫😫
0:23 SONIC, YOU VIOLATED THE LAW BY WALKING ON A RED BRIDGE
Mega Crash
1:07 SONIC TEAM PRESENTS... ILLEGAL INSTRUCTION$00002AAA!!!
😂😂😂
10:35 It writes fool
Because the person who could have created this corruption is a fool.
Oh wow this is very fascinating
I can't stop laughing
Sega Presents.....
Illegal Instruction
Sonic: I can't play my own game
Mario: well I can :D
3:18 sonic .exe
OMG It is XD
metal fox 913 ITA I
metal fox 913 ITA lol
metal fox 913 ITA No, it's Sonic.dll
metal fox 913 ITA no fuck off
10:59 NOW THAT IS SOME DISTORTION, MATE.
that music is really good 8:08
14:11: you: YAYY I PASSED!!!!!
the game: SEEEGAAAA
That *crispy* audio though.
I love how it says it again, just incase you didn't hear it the first time
9:00 press start Button is ILEGAL
Too Much illegal activity
When I was a toddler, I was playing this. I randomly got an illegal instruction. Then I cried for half and hour because I thought I broke the law.
*Illegal* instruction .
Lol
Illegal Instruction.
ILLEGAL INSTRUCTION
0:40 It's honest at least
1:45 OH GOD...H̰͚͙̫͔̳͙ͦͨ͊͂ͬe̳̤̻̳͉̼̒ POSSESSES THE Game AGAIN...SONIC.EXE!!!!!!
Most of the corruptions seen here can actually happen on the real Mega Drive, these happen when the cartridge get's pulled out slightly while the game is running.
Sonic.exe
Final round :v
(1:26)
2:21 wow it actually worked O-O
This is basicaly what a creepypasta should be, in my opinion
1:08 OMG THE GAME CRSHED EVEN BEFORE STARTING
RIP SANIC.1
Just _what_ did you do to corrupt the game each time? I'd like to toy around with this sort of thing...
1:10 "Illegal instruction $00002 AAA"
1:44 its like sonic.exe remake
1:31 what is this? A creepypasta?
Me: Starting level 1
Game: Illegal instruction
FBI OPEN UP!
10:46 ahh, green hill zone, nothing can go wrong her-
*oh, nevermind.*
When a single speck of dust hides in your cartridge:
Starts level
Game: NO THATS NOT HOW YOUR SUPPOSED TO PLAY THE GAME