Port Sonic 2 Level Select to Sonic 1
From Sonic Retro
Revision as of 08:05, 12 November 2017 by DelayHacks (talk | contribs)
Guide by User:DelayHacks. This is my first guide. You need to download level select by Esrael:
Download Sonic 2 Level Select in Sonic 1
File: s2menu.rar (29 kB) (info)
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and extract him to disassembly.
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.