Basic Questions and Answers Thread

Try this:




Obj21_Move:


addq.w #$01,$08(a0)


cmpi.w #$XX,$08(a0) ; has item rechead the value XX?


bne.s KeepMoving ; if not, branch


addq.b #2,$24(a0) ; this will go the to next rouine in order


jmp DisplaySprite ; Display object


KeepMoving:


rts



Also looking at it, my mistake it should of been move.w not move.b so that maybe why its not stopping so I apologise for that.

 

Yayz it worked! Thanks so much for this, though I didn't want you to resort into actually giving this out to the public but i suppose it's not so bad (at least thats what i think). anywho again thanks for the help as always MJ, and same to you Animemaster.

 

The important thing is that you understand WHY it works, and that you use what you learn from this to help you work around other (similar) issues, you may very well not be as lucky next time to recieve help as great as this, so I strongly suggest making alterations, testing them to see the effects, and learning exactly how it does what it does.

 

Oh I will alright, count on it. plus this can help me out more by experimenting with it and seeing how it works as you said and modify it. also my opinion but if I were you, I would remove that code. just saying because then everyone will see it (as if anyone didn't see it already) and then overuse it in their hacks. again just my own little opinion here.

 

I'm sure this is minor so I'll ask here. As well all know in Sonic 1 "Sound" E2 makes the music go faster, but this is something I saw (well heard rather) . Some tracks aren't effected by E2 at all! (The 1-Up Music, Game Over, The Credits, and a few of my S&K ported tracks (because that's all I could figure out how to do) did not speed up at all. Furthermore one track actually SLOWED down (My ported S&K Mini-boss Music), and because one of the things my boost does is that it speeds up the music. I would like to fix this (my ported tracks not the existing music), and any help will be GREATLY appreciated!

 

Im not an expert but I remember reading somewhere that you need the tempo as a certain value, can't remember what that is though, try looking at the other songs.


My Question:


What is the easiest way to port a background from, say, Sonic CD in my level?


I know its a vague question but I suck at SonED2.


EDIT: Spelling

 

Does anybody know what makes the whole "sonic has passed" object move at the beginning of the cutscene in SBz2?


I just noticed only one of my lines was moving (everything else stays there), and I can't find what triggers it. :/


Or maybe I'm just totally rusted...


Haha forget this, I find it, since I have one less object in my title card, it wasn't checking the right address for the end of the "total" object.

 

Routine "Obj3A_ChkBonus:"

Code:

        cmpi.w    #$501,($FFFFFE10).w

        bne.s    Obj3A_SetDelay

        addq.b    #4,$24(a0)

If the level is Scrap Brain Zone Act 2, it'll increase the routine counter of the object by an additional 4 (i.e. advancing 6), instead of running "Obj3A_Wait" then "Obj3A_NextLevel", it'll run "Obj3A_Wait" then "Obj3A_ChkPos2".


Edit: inb4 me...

 

Thank you.


If I understood correctly, that happens only in the "total" object, the game checks if that one has reached its final state in all other title card objects, so the check at the beginning of loc_C61A has to point to the "total" object, which is what was wrong.

 

Good to see you fixed it SpirituInsanum! Now I will ask for my bug in that specific part of the game too. I have coded the electrostatic shield to be removed when Sonic goes into the water (and a white flash will appear on the screen), and, by other way, my shields are keept beetween stages. Here is the bug: If I end SBz2 with the electrostatic shield, when Robotnik makes Sonic to fall down to the next stage, I can see the white flash and, of course, I start SBz3 without that shield... What could I try to fix this?


Other note is that I have applied the vladikcomper's fix for the level transitions that makes load the new level later and not as soon as it's done in the original game...

 

So I am using SonLVL to edit Sonic 1. After I edit the level, the title screen looks..weird. Any idea of why, and how to fix it? Pic below.


EDIT: My apologies, it was due to an incorrectly placed Chunk.Fixed now. I am new here, so I don't know if I can delete my own posts, but if not please delete this.

/monthly_06_2012/post-1979-0-14769400-1338513903_thumb.png

 

It happens because you've changed Sonic's start position in GHZ1. Restore at least Y-coordinate to the original and the bug will go.


C/P from my old post on Retro:


"Title screen uses layout engine like all normal levels do, it calls a subroutine that loads level stuff for GHZ1, including Sonic's start pos etc. It also calls level deformation subroutines to scroll BG with deformation like in normal level. Those routines work with camera, which is affected by Sonic's coordinates, that's why camera is a bit bottomer than it supposed to be, so deformation routines scroll BG and FG upper. But sprites on the title screen have on-screen coordinates system, I.e. their coordinates are not depending on camera positions, so they stay at their places."


There should be a fix for this though, but I can't check it out right now.

 

Hey! I am modifying Sonic The Hedgehog's GHZ. I am making an "ice" pallet, but have run into an issue. As it seems, the rings share the same pallet as the yellow flowers. So I either have to have yellow rings, or blue flowers. Is there anyway I can separate the ring from that pallet, and instead attach it to the HUD's or something like that? Thanks!


EDIT: I am also trying to make the Eggman Monitor work, I found it's line of code,


Obj2E_ChkEggman: ; XREF: Obj2E_Move


addq.b #2,$24(a0)


move.w #29,$1E(a0)


move.b $1C(a0),d0


cmpi.b #1,d0 ; does monitor contain Eggman?


bne.s Obj2E_ChkSonic


rts ; Eggman monitor does nothing


How do I change that "Eggman Monitor Does Nothing"? I want to make it hurt sonic like if he hit a badnik or landed on spikes.

 

The HUD has one yellow on Sonic's palette line, the rings need three yellows.


You could try recoloring the flowers in some tile editor, but you may not have any colors that match what you want in that palette.

 

In Sonic 2, it's simply:



robotnik_monitor:
addq.w #1,(a2)


bra.w Touch_ChkHurt2



Maybe that will help? Just replace this code with another monitor code that you're not going to use. "Touch_ChkHurt2" is more than likely named different in Sonic 1 though.


EDIT: Spellings

 

I added that code, Now the game won't boot. I think I need a different code, Maybe if I added something from an object that does hurt Sonic?


I'm sorry, I'm not quite sure what you mean. Do you mean to replace some code in the Robotnik Monitor object (Code I posted), Or find a monitor I am not using in Sonic 1?


EDIT: Here is the code for hurting Sonic by means of spikes. Maybe I could use this to my advantage?


Obj36_Hurt: ; XREF: Obj36_SideWays; Obj36_Upright


tst.b ($FFFFFE2D).w ; is Sonic invincible?


bne.s Obj36_Display ; if yes, branch


move.l a0,-(sp)


movea.l a0,a2


lea ($FFFFD000).w,a0


cmpi.b #4,$24(a0)


bcc.s loc_CF20


move.l $C(a0),d3


move.w $12(a0),d0


ext.l d0


asl.l #8,d0


sub.l d0,d3


move.l d3,$C(a0)


jsr HurtSonic


Edit: Scrolling through the ASM, I found an instance "Obj2E_NoMusic" and it's contents are blank. Can I tell the Eggman object to ridirect there and put a code that would hurt Sonic?

 

vladikcomper is 100% right. It is de to Sonic being moved from his regular start position in Green Hill act 1. They made the title screen use GHZ's properties, which also includes Sonic on the title... they obviously never thought that people would go ahead and start hacking their games.

 

I didn't experimented this because I keep the Sonic position from the original but shouldn't this be fixed with the mappings of Sonic in the logo?

 

No... if I remember well, that routine have an rts to terminate the invincibillity monitor routine without changing music when you are fighting with a boss... There is an Eggman monitor routine that is empty with an rts, that is the place.


You are asking even without testing your own thoughts and I think that is not the way, try your own stuff and study how asm works before asking for people to make the code for you.

 

MainMemory, I can't find a tile editor tat can edit the flower. SonLVL doesn't show the flower in it's tile list, and I don't have mappings for it to load into SonMapED. Could you recommend a tile editor?


Edit: I got my robotnik monitor working, and added a spindash.