Revision as of 23:50, 6 July 2018

Sonic Megamix "V5.0B"

I actually have a rom of Sonic the Hedgehog Megamix V5.0B I won't post a link (because i'll probably get banned) but here's some screenshots.

WARNING:These will contain ALOT of spoilers!

Preferences Screen

City Outskirts

Starry Night

Metallic Base

Notes

The time attack menu music has a few additional notes sounding like birds.
Special Stages are very different as they are based off the Sonic CD
The build was leaked in mid-2014 but was from 2011.
Stealth uploaded a video of a even later build.
Ending and Credits crashes (Credits doesn't in original mode).
Stealth refers to it as "V5.0a" (Version 5.0 Alpha)
City Outskirts CD theme was reused for Stardust Speedway act 1 in Sonic Mania.
Final Fight is Unfinished

Current Projects

Doomsday Zone Animation
Project:Sonic
Sonic 1 Enhanced Edition
Sonic 1 AS Disassembly (A Enhanced version of the original.)

Bug fixes

MegaPCM not waiting for the YM2612

Fix from Sonic 2 Clone Driver.

Fix

Find "SetupDAC" and below it insert this.

	; Wait for YM2612
-	bit	7,(iy+0)
	jr	nz,-

@@ Line 28: / Line 28: @@
 *Sonic 1 AS Disassembly (A Enhanced version of the original.)
-==Sonic 1 Enhanced Edition==
+=Bug fixes=
-*SRAM Support (Selbi's Guide) [http://sonicresearch.org/community/index.php?threads/how-to-work-with-sram.1948/ Link]
+==MegaPCM not waiting for the YM2612==
-*Title Screen Menu (with new game and continue options)
+Fix from Sonic 2 Clone Driver.
-*Sonic CD Style Camera (Nat The Porcupine's Guide)
-*Spindash
-*Sonic 3 Object and Ring Managers (SSRG)
-*Super Peelout and Sonic CD Sound Effects(From the Free Assets thread from SSRG)
-[[Category:User pages]]
-===Help Page===
-[http://forums.sonicretro.org/index.php?showtopic=38031 Link]
-=A Few Fixes=
-==Death Egg Music Not Playing After Boss (All Revisions)==
 ===Fix===
+Find "SetupDAC" and below it insert this.
-Goto '''''loc_39BA4''''' and you'll see this.
+<syntaxhighlight lang="asm"> ; Wait for YM2612
-<syntaxhighlight lang="asm"> move.b (Level_Music).w,d0</syntaxhighlight>
+- bit 7,(iy+0)
-Change the b to a w.
+ jr nz,-</syntaxhighlight>
-===Cause===
-The Game is trying to read the RAM address as a byte instead of a word which makes it load Sound 00 which is nothing.
-==Grabbers legs and skids are the wrong way (REV02 Only)==
-===Fix===
-Goto '''''InheritParentXYFlip:''''' and you'll see this.
-<syntaxhighlight lang="asm">   if gameRevision<2
- andi.b #$FC,d0
- move.b status(a0),d2
- andi.b #$FC,d2
- move.b render_flags(a1),d1
- andi.b #3,d1
-    else
- ; Peculiarly, REV02 changes this to only inherit the Y-flip.
- ; This causes a bug where some sprites are displayed backwards (Silver Sonic's sparks and Grabber's legs).
- andi.b #$FD,d0
- move.b status(a0),d2
- andi.b #$FD,d2
- move.b render_flags(a1),d1
- andi.b #2,d1
-    endif</syntaxhighlight>
-Remove the bit after the else and the '''''if gameRevision<2'''''.
-===Cause===
-Revisions 00 and 01 inherits the X and Y flips but for some reason in REV02 (Sonic Classics) they change it to only inherit the Y flip this means the sparks and legs won't be flipped horizontally.
-==Walking on air in WFZ (REV02 Only)==
-===Fix===
-Goto '''''loc_3B7BC:''''' and you'll see this.
-<syntaxhighlight lang="asm">    if gameRevision<2
- andi.b #standing_mask,d0
-    else
- ; I don't know what this change was meant to do, but it causes
- ; Sonic to not fall off ObjBD's ascending platforms when they retract,
- ; making him hover.
- andi.b #2,d0 ; 'Y-flipped' bit???
-    endif</syntaxhighlight>
-Like the last bug remove the REV02 check and everything below (and including) the else.
-===(Probable) Cause===
-It's possible that because the game isn't checking that Sonic is standing anymore this causes the game to think Sonic is on the ground.
-=A few optimizations for MegaPCM=
-==Optimization #1==
-At '''''Int_Normal''''' and '''''Int_NoOverride''''' you'll see this.
-<syntaxhighlight lang="asm"> cp 80h ; stop flag?
- jp z,StopDAC ; if yes, branch
- jp m,PauseDAC ; if < 80h, branch</syntaxhighlight>
-Delete them and replace them with this.
-<syntaxhighlight lang="asm"> jp Int_StopFlag</syntaxhighlight>
-Then above '''''Int_Normal''''' add this.
-<syntaxhighlight lang="asm">Int_StopFlag:
- cp 80h ; stop flag?
- jp z,StopDAC ; if yes, branch
- jp m,PauseDAC ; if < 80h, branch
- ret</syntaxhighlight>
-This will reduce the size by 1 byte.

User

Difference between revisions of "Shadow05"

From Sonic Retro

Revision as of 23:50, 6 July 2018

Contents

Sonic Megamix "V5.0B"

Preferences Screen

City Outskirts

Starry Night

Metallic Base

Notes

Current Projects

Bug fixes

MegaPCM not waiting for the YM2612

Fix