Difference between revisions of "Sonic the Hedgehog (16-bit)/Bugs"
From Sonic Retro
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==General bugs== | ==General bugs== | ||
| − | ===Missing Press Start on | + | ===Missing Press Start Button text on title screen=== |
| − | The text | + | The text “PRESS START BUTTON” was meant to be displayed on the title screen. However, due to RAM not being properly cleared after the two previous screens, it does not appear. The byte that should call for it to appear is shared with the previous screens, and since the RAM in this area is not reset, the value is stuck in a no call state. For a more technical explanation, see the [[Sonic Retro]] forums {{LinkRetro|topic=10240|title=here}}. To fix this bug and thereby display the text in-game, see [[SCHG How-to:Display the Press Start Button text|this guide]]. |
'''Not fixed''' in any version | '''Not fixed''' in any version | ||
| − | ===Hidden | + | ===Hidden points bug=== |
| − | + | When collecting the hidden points above the [[signpost]] at the end of the level, the game only rewards 10 points for the 100 point flags. A explanation how to fix the bug on your own is available [[SCHG How-to:Fix the Hidden Points bug in Sonic 1|here]]. | |
'''Not fixed''' in any version<!-- | '''Not fixed''' in any version<!-- | ||
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'''Not fixed''' in any version--> | '''Not fixed''' in any version--> | ||
| − | ===Missing | + | ===Missing percussion after 1-Up music=== |
| − | After collecting an extra life, if you pause the game as the main zone music starts to fade in, when you resume the game, the music resumes fading in but without percussion. Percussion is restored for the next music track that is played | + | After collecting an extra life, if you pause the game as the main zone music starts to fade in, when you resume the game, the music resumes fading in but without percussion. Percussion is restored for the next music track that is played (completing level, getting invincibility monitor, getting extra life, etc.). This also affects the [[Special Stage]] theme, but in a different way: FM channel 6 is disabled because the Special Stage theme uses 6 FM channels, unlike every other song in the game. In this case, the game need not be paused for the glitch to occur; it occurs after the song fades back in. |
'''Not fixed''' in any version | '''Not fixed''' in any version | ||
| − | ===Time counter | + | ===Time counter doesn’t flash=== |
| − | If the player is in the ninth minute, but he has at least one ring, the TIME counter | + | If the player is in the ninth minute, but he has at least one ring, the TIME counter won’t flash red because of a mistake in the [[HUD]] code. |
'''Not fixed''' in any version | '''Not fixed''' in any version | ||
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<small>See the [[#External_Links|External Links]] below for a video about these bugs</small> | <small>See the [[#External_Links|External Links]] below for a video about these bugs</small> | ||
===Zip through walls in [[Scrap Brain Zone]]=== | ===Zip through walls in [[Scrap Brain Zone]]=== | ||
| − | On the first act find the ledges that move right then left. Go to the far right side of the wall and wait for the platform to move to the right. As soon as it starts to move right, duck. | + | On the first act, find the ledges that move right then left. Go to the far right side of the wall and wait for the platform to move to the right. As soon as it starts to move right, duck. You’ll go through the wall. While here, press {{Left}} to zip right and {{Right}} to zip to the left. |
'''Fixed''' in [[Sonic the Hedgehog Genesis]] | '''Fixed''' in [[Sonic the Hedgehog Genesis]] | ||
===Speed Tunnel Scrolling in [[Green Hill Zone]]=== | ===Speed Tunnel Scrolling in [[Green Hill Zone]]=== | ||
| − | On the first act there is a series of two speed tunnels with a star post in the middle. Occasionally, if [[Sonic]] is moving too fast the screen | + | On the first act there is a series of two speed tunnels with a star post in the middle. Occasionally, if [[Sonic]] is moving too fast the screen won’t scroll down fast enough, and when Sonic touches the bottom of the screen he will die, as if it were a pit. |
'''Fixed''' in [[Sonic the Hedgehog Genesis]] | '''Fixed''' in [[Sonic the Hedgehog Genesis]] | ||
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===Crash Game in [[Marble Zone]]=== | ===Crash Game in [[Marble Zone]]=== | ||
| − | If you get a quick start in Marble Zone Act 2, bash both | + | If you get a quick start in Marble Zone Act 2, bash both [[Buzz Bomber]]s in one jump, in the same jump make it over the lava, and land, the game will crash, similar to the above bug in [[Labyrinth Zone]]. At the bottom it says “<pre>ADDRESS ERROR $00148A0$2E600</pre>”. |
| − | |||
===Go through solid marble in [[Marble Zone]]=== | ===Go through solid marble in [[Marble Zone]]=== | ||
| − | In | + | In Marble Zone, during the sections in which Sonic rides a square rock through lava and there are square walls blocking the way, the player can crouch and go right through the marble walls instead of having to jump over them. |
===Fall off level in [[Final Zone]]=== | ===Fall off level in [[Final Zone]]=== | ||
| − | It is possible to fall off the edge of the level after defeating [[Eggman]]. This is only possible if Eggman is hit one final time when trying to escape. If not, | + | It is possible to fall off the edge of the level after defeating [[Eggman]]. This is only possible if Eggman is hit one final time when trying to escape. If not, Sonic’s forward movement will be stopped when jumping near the edge. |
'''Fixed''' in [[Sonic the Hedgehog Genesis]] | '''Fixed''' in [[Sonic the Hedgehog Genesis]] | ||
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===Going too high in [[Star Light Zone]]=== | ===Going too high in [[Star Light Zone]]=== | ||
| − | On the first act there is a place with an [[Orbinaut]]. Jumping there is OK, but if | + | On the first act there is a place with an [[Orbinaut]]. Jumping there is OK, but if you’re pushed higher, by getting hit, you’ll die. |
'''Fixed''' in [[Sonic the Hedgehog Genesis]] | '''Fixed''' in [[Sonic the Hedgehog Genesis]] | ||
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==Player bugs== | ==Player bugs== | ||
===Jumping next to solid objects=== | ===Jumping next to solid objects=== | ||
| − | In certain circumstances, but most often when next to a solid object, jumping will use the wrong animation, so that Sonic appears to | + | In certain circumstances, but most often when next to a solid object, jumping will use the wrong animation, so that Sonic appears to walk in mid-air. This happens often in [[Marble Zone]] whilst on the blocks that float on the lava. This also happens in [[Green Hill Zone]] Act 2, at the second block (the one with the yellow spring on top). |
'''Not fixed''' in any version | '''Not fixed''' in any version | ||
Revision as of 16:41, 2 January 2012
General bugs
Missing Press Start Button text on title screen
The text “PRESS START BUTTON” was meant to be displayed on the title screen. However, due to RAM not being properly cleared after the two previous screens, it does not appear. The byte that should call for it to appear is shared with the previous screens, and since the RAM in this area is not reset, the value is stuck in a no call state. For a more technical explanation, see the Sonic Retro forums
Not fixed in any version
Hidden points bug
When collecting the hidden points above the signpost at the end of the level, the game only rewards 10 points for the 100 point flags. A explanation how to fix the bug on your own is available here.
Not fixed in any version
Missing percussion after 1-Up music
After collecting an extra life, if you pause the game as the main zone music starts to fade in, when you resume the game, the music resumes fading in but without percussion. Percussion is restored for the next music track that is played (completing level, getting invincibility monitor, getting extra life, etc.). This also affects the Special Stage theme, but in a different way: FM channel 6 is disabled because the Special Stage theme uses 6 FM channels, unlike every other song in the game. In this case, the game need not be paused for the glitch to occur; it occurs after the song fades back in.
Not fixed in any version
Time counter doesn’t flash
If the player is in the ninth minute, but he has at least one ring, the TIME counter won’t flash red because of a mistake in the HUD code.
Not fixed in any version
Level bugs
See the External Links below for a video about these bugs
Zip through walls in Scrap Brain Zone
On the first act, find the ledges that move right then left. Go to the far right side of the wall and wait for the platform to move to the right. As soon as it starts to move right, duck. You’ll go through the wall. While here, press 
to zip right and 
to zip to the left.
Fixed in Sonic the Hedgehog Genesis
Speed Tunnel Scrolling in Green Hill Zone
On the first act there is a series of two speed tunnels with a star post in the middle. Occasionally, if Sonic is moving too fast the screen won’t scroll down fast enough, and when Sonic touches the bottom of the screen he will die, as if it were a pit.
Fixed in Sonic the Hedgehog Genesis
Crash game in Labyrinth Zone
At the end of the first two acts, if the camera is panned down at the moment the results screen is about to appear, the game may crash with an Illegal Instruction exception. The SCHG has a fix for this bug.
Fixed in Sonic Classic Collection.
Crash Game in Marble Zone
If you get a quick start in Marble Zone Act 2, bash both Buzz Bombers in one jump, in the same jump make it over the lava, and land, the game will crash, similar to the above bug in Labyrinth Zone. At the bottom it says “ADDRESS ERROR $00148A0$2E600”.
Go through solid marble in Marble Zone
In Marble Zone, during the sections in which Sonic rides a square rock through lava and there are square walls blocking the way, the player can crouch and go right through the marble walls instead of having to jump over them.
Fall off level in Final Zone
It is possible to fall off the edge of the level after defeating Eggman. This is only possible if Eggman is hit one final time when trying to escape. If not, Sonic’s forward movement will be stopped when jumping near the edge.
Fixed in Sonic the Hedgehog Genesis
Final Zone Boss bug
In Final Zone, getting the final hit on Robotnik early in the round will allow a player to hit him again while the piston slowly retracts. This action loops his hit counter from 0 to 255, and interrupts the defeat sequence, making Robotnik restart his attack pattern. The only thing that can be done at this point is to fight on until Time Over or allow yourself to be killed and restart the stage.
Fixed in Sonic the Hedgehog Genesis
Going too high in Star Light Zone
On the first act there is a place with an Orbinaut. Jumping there is OK, but if you’re pushed higher, by getting hit, you’ll die.
Fixed in Sonic the Hedgehog Genesis
Player bugs
Jumping next to solid objects
In certain circumstances, but most often when next to a solid object, jumping will use the wrong animation, so that Sonic appears to walk in mid-air. This happens often in Marble Zone whilst on the blocks that float on the lava. This also happens in Green Hill Zone Act 2, at the second block (the one with the yellow spring on top).
Not fixed in any version
External Links
- Youtube video that shows the level bugs mentioned above.
- Youtube video that shows the Star Light Zone level bug mentioned above.
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