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Difference between revisions of "Port Sonic 2 Level Select to Sonic 1"

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''(Guide by [[User:DelayHacks]])''
 
''(Guide by [[User:DelayHacks]])''

Revision as of 14:35, 24 November 2017

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(Guide by User:DelayHacks)

You need to download level select by Esrael:

Download.svg Download Sonic 2 Level Select in Sonic 1
File: s2menu.rar (29 kB) (info)

and extract it to the root of your dissassembly.

Getting Level select in game

After download and add to disassembly go to "sonic1.asm" and go to end and you see this

; end of 'ROM'
EndOfRom:


		END

add this line before "; end of 'ROM'"

         include 's2_menu.asm' ; Sonic 2 Level Select

now go to

Title_ChkLevSel:
		tst.b	($FFFFFFE0).w		; check	if level select	code is	on
		beq.w	PlayLevel		; if not, play level
		btst	#iA,(Joypad|Held).w	; check if A is held
		beq.w	PlayLevel		; if not, play level
		moveq	#2,d0
		bsr.w	PalLoad2		; load level select pallet
		lea	($FFFFCC00).w,a1
		moveq	#0,d0
		move.w	#$DF,d1

and replace with this

Title_ChkLevSel:
		tst.b	($FFFFFFE0).w		; check	if level select	code is	on
		beq.w	PlayLevel		; if not, play level
		btst	#iA,(Joypad|Held).w	; check if A is held
		beq.w	PlayLevel		; if not, play level
		jmp     Level_Select_Menu ; if yes, goto Sonic 2 level select	
		moveq	#2,d0
		lea	($FFFFCC00).w,a1
		moveq	#0,d0
		move.w	#$DF,d1

Other

Also, go to "_inc\Pallet pointers.asm" and under this:

	dc.l Pal_Ending
	dc.w $FB00
	dc.w $1F

paste this:

    dc.l Menu_Palette; pallet address
    dc.w $FB00	; RAM address
    dc.w $1F	; (pallet length / 2) - 1

now you have real Sonic 2's level select pallet. To edit music in level select, go to "s2_menu.asm" and find:

Level_Select_Menu_snd   = $0081

replace "81" with music what you want in level select (# of music + 80). To edit sound after "all emeralds" code find:

Emerald_Snd             = $0093

and replace "93" with sound what you want. To edit ring sound after "debug mode" code find:

Ring_Snd                = $00B5

and replace "B5" with sound what you want. To edit texts find label "Menu_Level_Select_Text:" and you see

                dc.b    $0E, _G, _R, _E, _E, _N, __, _H, _I, _L, _L, __, __, __, __, __
                dc.b    $0E, _L, _A, _B, _Y, _R, _I, _N, _T, _H, __, __, __, __, __, __
                dc.b    $0E, _M, _A, _R, _B, _L, _E, __, __, __, __, __, __, __, __, __
                dc.b    $0E, _S, _P, _R, _I, _N, _G, __, _Y, _A, _R, _D, __, __, __, __
                dc.b    $0E, _S, _T, _A, _R, __, _L, _I, _G, _H, _T, __, __, __, __, __
                dc.b    $0E, _S, _C, _R, _A, _P, __, _B, _R, _A, _I, _N, __, __, __, __
                dc.b    $0E, _F, _I, _N, _A, _L, __, __, __, __, __, __, __, __, __, __   
                dc.b    $0E, _S, _P, _E, _C, _I, _A, _L, __, _S, _T, _A, _G, _E, __, __
                dc.b    $0E, _E, _N, _D, _I, _N, _G, __, _S, _E, _Q, _U, _E, _N, _C, _E
                dc.b    $0E, _S, _O, _U, _N, _D, __, _T, _E, _S, _T, __, __, _st,__, __

now you can edit texts in level select. To edit "debug mode" code go to label "Code_Debug_Mode:". To edit "all emeralds" code go to label "Code_All_Emeralds:" Thats all. All permissions for this level select code goes to Esrael. Result: S2levelselectInS1.png