Sonic 1 Prototype - Illegal Instruction Error

NOTE: This error can be triggered on the PROTOTYPE version of Sonic 1 ONLY.
However, once you reach the end of Labyrinth Zone Act 1/2 on the final release, use a Spin Attack just as you finish. Then press down on the D-Pad.
This is a rather cool error - but it's more of a crash. There's 3 ways to trigger it:
(1) Sound Select (shown in video)
This works with PROTOTYPE Sonic ONLY.
1. At the title screen, press the following keys:
UP
DOWN
LEFT
RIGHT
A*
START
*Hold this button while you press the next one.
2. Go to Sound Select and change it to "92".
3. Press START and enjoy!
(2) Labyrinth Zone
Once you reach the end of Labyrinth Zone Act 1/2, use a Spin Attack just as you finish. Then press down on the D-Pad.
(3) This crash can happen when something happens that the game can't handle.

[@DobleDDD]

Fnf fans when they hear a prolonged note:

[@JulianR0108]

what

[@its_notjordan]

why are these jokes so unfunny and corny in a way

[@funkyplayer6525]

​@@its_notjordanits reality

[@JSWC64]

​@@its_notjordanIt's facts

[@Unknowntrashcan]

@@its_notjordanwell at-least it’s not misogyny.

[@Doubleitch]

Sometimes if I mess around with the cartridge of sonic 1, it says emulator error, despite being on physical hardware. Just thought it was funny.

[@FLCGaming]

I don’t have my own Mega Drive yet.

[@inqmusician2]

Some 68k's had lines for additional processors and that way, you can add some hardware for floating-point math that Sonic 1 for example, has used. The reason it's called an emulator is to raise an exception if the connection has lost either on the A-line(1010), or on the F-line(1111). There are other errors like the illegal instruction, when it tries to jump or write to a memory that doesn't exist, or it doesn't own. I've never seen a PRIVILEGE VIOLATION error before, even though the 68k guide has it.

[@orang3blur]

​@@inqmusician2I have encountered a PRIVILEGE VIOLATION error in Sonic 2 when trying to load a Sonic 1 savestate before. Spamming D after getting various common errors resulted in the PRIVILEGE VIOLATION occurring.

[@thecringeofficer]

every sonic.exe jumpscare:

[@_gherry]

green hill lore

[@FLCGaming]

Haha

[@chewmah]

sonic the hedgehog illegal instruction speed run 20 second

[@FLCGaming]

I’ll try to do it faster next time!

[@chewmah]

@@FLCGaming no thats a new record
edit well its really 7 seconds

[@youraveragesonicfan54]

Next thing we know. VS ILLEGAL INSTRUCTION.EXE or smth

[@inf4m0us4m]

😮

[@Cyph3rZ]

If you keep pressing b when that error is displayed, it will output a never seen before "address error"

[@FLCGaming]

Address errors always happen lol

[@Cyph3rZ]

​​@@FLCGamingi already known that simply i never see that error 😅

[@i_hate_myl_life]

Æ

[@Cyph3rZ]

@@i_hate_myl_life Œ

[@kxg9000]

​​@@FLCGaming
Something must've caused it to jump to an address ending with an odd number or something. I wish I knew more about 68K programming...

[@Slaps-Bigmeat]

If you have one of the newer genesis for when you crash the game with the labyrinth act 1/2 and it shows the illegal instructions with the newer genesis you can actually rewind and when rewinding it rewinds the crash so incase you accidentally crash it then rewind and it’s fixed

[@FLCGaming]

Ah nice. This video was made with an emulator.

[@Slaps-Bigmeat]

Yes I also did the same on my channel

[@Sonic69360]

92 is The Drowning Theme But It Crashes
93 is Get Chaos Emerald Which It Don't Make A Sound

[@FLCGaming]

Yeah, in the prototype, 93 is silent.

[@redzils]

NEW SONIC.EXE OC JUST DROPPED 🔥🔥

[@FLCGaming]

Haha lol, pretty scary error. Imagine it’s 3AM and you get this error

[@randomidelscawy]

0:03 sonik sez: oh god flu- (sigh) you know what's about to happen now... right?

[@OLRGAMINGXCX]

one more time got me like:

[@E_GAMING-b7z]

How did he get the prototype💀

[@FLCGaming]

Search for the prototype ROM online.

[@user-yj4zs7bz3z]

Youre using this emulator too? :)

[@FLCGaming]

Yep

[@Pika_tube19]

Ams

[@Kayden100Official]

green hill lore 0:15

[@i_eat_orphans_2773]

hey man whats the website name or program name

[@_gherry]

neptuneJS
it took me an hour to get working
the code on the website is totally broken, and you need vs code's live server extension.

[@FLCGaming]

@@_gherryIt’s some sort of online Java emulator. This is before I got RTC with Bizhawk.

[@deblpr_old]

@@FLCGamingsorry but
*javascript

[@deblpr_old]

@@_gherrywasn’t called emulatorjs?

[@Evilguy608]

How do you do this glitch

[@sawyerjohnston2544]

Play sound 92 in the sound test and if you are wondering what causes this it's because sound 92 is a invalid pointer in the sonic 1 prototype and playing it will crash the game because it's playing an invalid sound that doesn't exist in the game

[@FLCGaming]

@@sawyerjohnston2544Totally right. You can also use RTC to send corruptions which causes these crashes.

[@Rescoj]

Dxxd?

[@arobloxgamerthathasachannel]

hey u use the same emulator that i use

[@FLCGaming]

Nice.

[@deblpr_old]

Wow emulator js

[@sklyarslavik]

How to get secret level

[@FLCGaming]

What secret level?

[@sklyarslavik]

Idk

[@FLCGaming]

@@sklyarslavikI recommend you look it up.