ASM: Request, help and general discussion

[VideoGuy]

I believe that's what anti_boo is. Someone correct me if I'm wrong.

[Machoman]

I believe that's what anti_boo is. Someone correct me if I'm wrong.

That one doesn't follow you if you don't look at it.

And it dives down to low to hurt you if you're standing still.

[Personalness]

Could somebody please write up a code that doubles the speed of sprites in sublevel A4? And also give me instructions as to how i would go about applying this code to my level?

[Kil2]

Can I use LevelASM to do simple ROM edits level wise? I'd like to enable free scrolling by changing $00:F878 to 80. Is that just some simple org db in the LevelASM, or is it impossible?

(I'd like it enable cause of level being easier to do with that enabled)

You can't make rom edits on a per level basis with level asm. You would have to apply some kind of patch to the rom.

[Kil2]

Do say, is there a simple way to check if a sprite touches anything, be it player, sprite, floor or wall? I know how to make it check everything seperately but I have this suspicion there's an easier way to do it.

The only way I can think of is checking the Sprites Blocked table.

Code: Select all

$7E:1588	12 bytes	Sprites	Sprite blocked status table. Format: xxxxUDLR.

That will tell you if a sprite is blocked in some direction.

[DaxterSpeed]

Can I use LevelASM to do simple ROM edits level wise? I'd like to enable free scrolling by changing $00:F878 to 80. Is that just some simple org db in the LevelASM, or is it impossible?

You can't make rom edits on a per level basis with level asm. You would have to apply some kind of patch to the rom.

Well, I just noticed that that change was already in...

Must check these things more properly.

[Kil2]

Could somebody please write up a code that doubles the speed of sprites in sublevel A4? And also give me instructions as to how i would go about applying this code to my level?

Actually it seems this isn't trivial unless you reinsert a modified disassembly of each sprite.

[randoguy101]

Is there any specific way to make Demo turn invisible for the rest of the level? (Not an evil trick, don't worry)

[yoshicookiezeus]

Is there any specific way to make Demo turn invisible for the rest of the level? (Not an evil trick, don't worry)

Code: Select all

LDA #$03
STA $78

I believe this will do just that. Just note that it won't turn the cape or Yoshi replacement invisible, just Demo herself.

[AUS]

How would I change the melody that plays when you die for just my level?

[Kil2]

While not impossible, that'd be extremely difficult and would require external patching.

[AUS]

Sounds like fun, how would I go about doing it? :) I bet I sound so naive.

[KingTwelveSixteen]

[stuff]
How to insert Levelasm in 1 easy step

1.0) Go to smwc and download "Ersanio's level ASM + INIT" from the patches section
1.1) Dump all the files in your main folder
1.2) Go to start menu > accessories > command prompt, and copy that into the same folder
1.3) Open the level.asm file and change !freespace = $xxxxxxxx to some freespace. $938E00 was free on an expanded rom I checked
1.4) Get xkas from somewhere and dump it in the main folder
1.5) Open levelcodes.asm and copy your levelasm code to the corresponding level
1.6) Open the command prompt in the folder and type [xkas level.asm ROMNAME.smc]
1.7) That's it.

A couple of questions:

1. What do you mean by main folder?
2. I just put a copy of command prompt in the folder for ease of use right?
3. What is xkas?

[Kil2]

1. The main folder is the one with all the stuff you need. Whichever folder you're going to dump all this stuff into is the main folder.
2. Yes. If you know how to navigate directories from the command prompt you don't need to copy it.
3 .xkas translates asm files into machine code and patches them into the rom. You can download it from smwc.

[Kil2]

Sounds like fun, how would I go about doing it? :) I bet I sound so naive.

Actually I thought of a much easier way. Just some levelasm that checks if the normal death music was told to play which cancels it before it can start and then loads whatever other song you want played.

[Kil2]

... and it works. So it turns out it's really really easy to have custom death/goal music for any level you wish. Wish we had known that for asmt.

[KingTwelveSixteen]

... and it works. So it turns out it's really really easy to have custom death/goal music for any level you wish. Wish we had known that for asmt.

...Did you just suddenly figure out something nobody else knew about? 'Cause that would be awesome.


"'xkas' is not recognized as an internal or external command, operable program or batch file."
I don't know what I did wrong but that was the message my command prompt gave me.

[Kil2]

... and it works. So it turns out it's really really easy to have custom death/goal music for any level you wish. Wish we had known that for asmt.

...Did you just suddenly figure out something nobody else knew about? 'Cause that would be awesome.


"'xkas' is not recognized as an internal or external command, operable program or batch file."
I don't know what I did wrong but that was the message my command prompt gave me.

The death music works.

And the only reason it would say that is if you didn't put xkas in the same folder with everything else.

[AUS]

... and it works. So it turns out it's really really easy to have custom death/goal music for any level you wish. Wish we had known that for asmt.

Fantastic, so can you help me out?

[Kil2]

Use this levelasm. I can't test it because I don't have addmusic patched in my test rom but it should work.

Code: Select all

level105:

	!SONGNUM = #$03

		LDA $1DFB
		CMP #$09
		BNE MUSICLOADRETURN
		LDA !SONGNUM
		STA $1DFB

ADDMUSICJML:
			
		STA $0DDA				
		LDA #$11		
		STA $0100		

		STZ $4200		

		LDA $13BF
		PHA
		STZ $13BF

		LDA $0DAE		
		PHA			
		LDA $0DAF		
		PHA			
		
		PHK			
		PER RETURNADDR-1	

		TDC
		PHA
		PLB

		TXA
		JML [$9741]

RETURNADDR:			

		PLA			
		STA $0DAF	
		PLA	
		STA $0DAE		

		LDA #$14		
		STA $0100		

		PLA
		STA $13BF


		LDA #$81		
		STA $4200	

MUSICLOADRETURN:
	RTS

change !SONGNUM = #$03 to the number of the song you want to tplay when you die

[AUS]

Thank you very much kil. I'll edit this post if it doesn't work. EDIT: I'm not sure if it works or not.

[KingTwelveSixteen]

It turned out I was using a shortcut to the command prompt instead of an actual copy. Now I apparently did something else wrong since the screen is all black instead of actually playing the game, BUT I WILL FIX IT!

[AUS]

I downloaded [Xkas] Ersanio's LevelASM + Init v1.3 from http://www.smwcentral.net/?p=list&type=patches but when I typed in xkas and crap in cmd it said it's not a valid run thing.

Then I downloaded xkas v0.06 (unofficial) from http://www.smwcentral.net/?p=list&type=tools and this time I just get an error, something about RETURNADDR ALREADY DEFINED or something.

Instead of having me run around downloading random things hopelessly, could you point me to what exactly to download?

Yes, it's all in the same folder with my rom.
EDIT: I have an idea, one sec.
EDIT2: The idea was good (I renamed returnaddr so it wouldn't conflict) but now the game just crashes after Hey there raocow!

Probably because the files I downloaded are incorrect.

[KingTwelveSixteen]

Ok, yeah. I have no idea how to fix it.

I think that the problem is where I put the stuff, I was supposed to put all that stuff you made for me in the level I am using right?

[Kil2]

You guys need to get rid of "level105:" and put all the code after whatever level you have by the way.

I downloaded [Xkas] Ersanio's LevelASM + Init v1.3 from http://www.smwcentral.net/?p=list&type=patches but when I typed in xkas and crap in cmd it said it's not a valid run thing.

Then I downloaded xkas v0.06 (unofficial) from http://www.smwcentral.net/?p=list&type=tools and this time I just get an error, something about RETURNADDR ALREADY DEFINED or something.

Instead of having me run around downloading random things hopelessly, could you point me to what exactly to download?

Yes, it's all in the same folder with my rom.
EDIT: I have an idea, one sec.
EDIT2: The idea was good (I renamed returnaddr so it wouldn't conflict) but now the game just crashes after Hey there raocow!

Probably because the files I downloaded are incorrect.

You downloaded the correct files. When you renamed returnaddr did you change both of them? If you change one, you have to change the other. Also are you testing on a rom with romi's addmusic on it? It needs that to load the music. Anyway your code should work in the final rom.