Basic Questions and Answers Thread

Did you accidentally add extra blank tiles to knuckles art? I once added extra files to the monitor Art in S1, and it overwrote the checkpoint art.

 

I'm added S3&K styled special stage ring and after exiting from ring I noticed this:



It appears for one frame, but it can't be seen before it dissapears. Anyway to fix it?

 

I haven't touched Knuckles' art at all, but having extra blank tiles in his art wouldn't cause this issue due to the Characters art being handled dynamically. This has been annoying me all day, it's probably something really simple that i'm overlooking.  

 

Are their any decent tutorials for adding the jumpdash into S1? I know this is generally a rather noobish thing to do, but I love this move, and have some interesting plans for it. I'd look myself, but I've heard that the jumpdash is the most pirated bit of sonic code on the internet...

 

The game appears to be loading GHZ's PLCs. The only way to really fix this is to either tell the object to not appear for whatever the duration is, or, change the order in which the game loads art.

 

@Pacguy: This lovely guide.


P.S. Jump Dash is not most pirated ability, but its strange subtype named Homing Attack is.

 

So I followed this guide on implementing an S2 styled level select in sonic 1, but I can't get planed to edit it's mappings so I can correct the level names. Here is my planed settings file (I purposefully changed some of the file endings; I know they're correct because I double checked.)

 

Actually the mappings in this S2 levsel are hardcoded in various places in the s2_menu.asm. You can edit the names in Menu_Level_Select_Text:.

 

I have changed the Level Select to act as an Option menu with sound test on this menu. I also have  the S2 level select, with the sound test on here a MegaPCM Dac Test. Sound test uses $FFFFFF84 (as it should) & MegaPCM Dac test uses $FFFFFF86. In the option menu, when playing a sound, then going to Level Select, it acts as if it Backtracked to the options. Problem 1



I finally got the Character Change Option to work... somewhat right. oddly enough, i had to change macros on Character, & Playlist

Character = $FFFFFFFE, I changed it to another unused location (I recall someone saying $FFFFFFFE was for some checking routine 

I can Push right on Character to change to Sonic, Richter & Nebula Sonic, but pushing left won't change character. Somewhat with playlist, but wanting to change Left to Normal Playlist, Right is custom music. Problem 2

I know the answers lie in LevelSelect & LevSel_Controls

(Not on home computer & don't have Disassemblies with me, or i'd show the code)

 

Not sure if this is a "basic" question, but I'm wondering: How exactly do animated tiles work in Sonic 2?

 

from what I can tell, as system similar to the PLC system consistently overwrites specific art tiles on a timer through the duration of the level. I'm actually curious about this too, though; I don't know any specifics.

 

Sorry to double post, but I have a legitimate issue. I've been trying to implement markeys' old SSRG screen into my S1 hack, but it just makes the game loop back to the Sega screen, forcing the game into an infinite loop. Some experimentation seems to suggest that it ignore the 2 in the 20 value that codes for the SSRG screen mode, making the game read it as 0 and rebooting the Sega screen (I know because adding an extra mode to the array and setting it to 24 goes to mode 04, the title screen)

 

Pacguy In maingameloop

Code:

Move.b ($FFFFF600).w,d0
Andi.w #$7C,d0

Move.l Gamemodearray(PC,d0.w)a0
Jsr (a0) 
Bra.s maingameloop

Change the bra.w in gamemodearray to dc.l and there you go

 

....Or you could not do that, as that is rather silly and completely irrelevant to the problem at hand.

Pacguy, here is what you should see in your GameModeArray. Not exactly like this, but this is the basic list of what you should see. Far too lazy to open up the S1 disasm just to copy and paste it.


GameModeArray:
bra.w SsegaScreen ; Game Mode 00
bra.w TitleScreen ; Game Mode 04
bra.w Level ; Game Mode 08
bra.w Level ; Game Mode 0C
bra.w SpecialStage ; Game Mode 10
bra.w ContinueScreen ; Game Mode 14
bra.w Ending Sequence ; Game Mode 18
bra.w Credits ; Game Mode 1C

At the end of this list, go ahead and add this line.


bra.w SSRG_Screen ; Game Mode 20

I'm only assuming this is the name of the Mode. Name it to whatever it is titled. I'm trying to make this as generic as possible.

Now, assuming the order you want your game to start up is as follows:

Sega Screen->SSRG Screen->Title Screen

Do this.

Go to "SegaGotoTitle"

 Change the line


move.b #4,($FFFF600).w

to this.


move.b #$20,($FFFF600).w

Now, your SEGA screen should go to the SSRG Splash Screen. Next, go to SSRG_ScreenFinish.

This is what your first line should like.


move.b #$04,($FFFFF600).w ; set the screen mode to Title Screen

If it is exactly the same as above, nvm.

Now, if you have any other issues, go ahead and come back later, but also show what code changes you've done up to this point. You might have messed up somewhere.

Also, really warr1or2? bra.w to dc.l? Next thing you know you'll want him changing his bsr's to jsr's. =P

 

Superegg i had the same problem pacguy has and I've done what you've mentioned. didn't work so i applied it the way i mentioned and it works like a charm.

 

Actually, neither of those were my problem. I had to change one line in maingameloop:

MainGameLoop:
        move.b    ($FFFFF600).w,d0 ; load    Game Mode
        andi.w    #$3C,d0
        jsr    GameModeArray(pc,d0.w) ; jump to apt location in ROM
        bra.s    MainGameLoop

The bolded line originally had #$1C instead of 3C, I found it while examining maingameloop based on warr1or2s' suggestion. I have no idea what he was actually trying to tell me, though.

 

I found the fix on SonicGamesDimension

 

You know Pacguy I was just about to suggest exactly that in IRC, but you had left by the time I read it. I had to do the exact same thing in Sonic 2 (which has $3C there by default) for a hack once.

 

Out of curiosity I checked how I did this in my hack some time ago, and I noticed I had everything rewritten to work with dc.l's.

Code:

; ---------------------------------------------------------------------------
; Main Game Loop, everything before this is only done on startup.
; ---------------------------------------------------------------------------

MainGameLoop:
		moveq	#0,d0
		move.b	($FFFFF600).w,d0
		movea.l	GameModeArray(pc,d0.w),a1
		jsr	(a1)
		bra.s	MainGameLoop

; ---------------------------------------------------------------------------
; Main game mode array (screen modes / game modes)
; ---------------------------------------------------------------------------
GameModeArray:
		dc.l	SegaScreen	; Sega Screen		($00)
		dc.l	TitleScreen	; Title	Screen		($04)
		dc.l	Level		; Demo Mode		($08)
		dc.l	Level		; Normal Level		($0C)
		dc.l	SpecialStage	; Special Stage		($10)
		dc.l	ContinueScreen	; Continue Screen	($14)
		dc.l	EndingSequence	; Ending Sequence	($18)
		dc.l	Credits		; Credits		($1C)
		dc.l	InfoScreen	; Info Screen		($20)
		dc.l	OptionsScreen	; Options Screen	($24)
		dc.l	ChapterScreen	; Chapters Screen	($28)
		dc.l	CreditsNew	; New Credits Screen	($2C)
; ---------------------------------------------------------------------------

What I don't know is why I did that. Does anyone have an idea? I just want to understand my train of thought I had back then. :V

 

Two reasons come to mind:

1. Processes faster
2. Omits the distance limit