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<blockquote data-quote="Mildanner" data-source="post: 6478" data-attributes="member: 7577">So, you want to make a moveable title screen background for Sonic 1? Once the devs made it so known for having a famous moving right background, but what I do to move it?It&#039;s simple, go to your disassembly root and in sonic.asmYou should find a label with the name &quot;Tit_MainLoop:&quot; and find this simple piece of code[CODE]&nbsp; &nbsp; &nbsp; &nbsp; move.w&nbsp; &nbsp; (v_player+obX).w,d0&nbsp; &nbsp; &nbsp; &nbsp; ; get current title screen position (big Sonic object)&nbsp; &nbsp; &nbsp; &nbsp; addq.w&nbsp; &nbsp; #2,d0&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ; move it 2px to the right[/CODE]Sounds simple? You can change the 2 with the number you want and changing the speed of it.Replace it with this[CODE]&nbsp; &nbsp; &nbsp; &nbsp; move.w&nbsp; &nbsp; (v_objspace+obX).w,d0&nbsp; &nbsp; &nbsp; &nbsp; move.b&nbsp; &nbsp; (v_jpadhold1).w,d1&nbsp; &nbsp; ; Read pressed buttons&nbsp; &nbsp; &nbsp; &nbsp; ; --- Check B button to stop ---&nbsp; &nbsp; &nbsp; &nbsp; btst&nbsp; &nbsp; #4,d1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ; Is B button held? (bit 4)&nbsp; &nbsp; &nbsp; &nbsp; bne.s&nbsp; &nbsp; .ApplyMove&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; ; If yes, skip movement (stops Sonic)&nbsp; &nbsp; &nbsp; &nbsp; ; --- Speed Logic (Right) ---&nbsp; &nbsp; &nbsp; &nbsp; btst&nbsp; &nbsp; #3,d1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ; Is Right held? (bit 3)&nbsp; &nbsp; &nbsp; &nbsp; bne.s&nbsp; &nbsp; .FastRight&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; ; If yes, go to +4 speed&nbsp; &nbsp; &nbsp; &nbsp; addq.w&nbsp; &nbsp; #2,d0&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ; Default: +2 speed&nbsp; &nbsp; &nbsp; &nbsp; bra.s&nbsp; &nbsp; .CheckLeft.FastRight:&nbsp; &nbsp; &nbsp; &nbsp; addq.w&nbsp; &nbsp; #4,d0&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ; Fast: +4 speed&nbsp; &nbsp; &nbsp; &nbsp; ; --- Recoil Logic (Left) ---.CheckLeft:&nbsp; &nbsp; &nbsp; &nbsp; btst&nbsp; &nbsp; #2,d1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ; Is Left held? (bit 2)&nbsp; &nbsp; &nbsp; &nbsp; beq.s&nbsp; &nbsp; .ApplyMove&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; ; If not, skip to applying movement&nbsp; &nbsp; &nbsp; &nbsp; subq.w&nbsp; &nbsp; #4,d0&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ; If yes, subtract 4 (move backward).ApplyMove:&nbsp; &nbsp; &nbsp; &nbsp; move.w&nbsp; &nbsp; d0,(v_objspace+obX).w ; Save the new X position&nbsp; &nbsp; &nbsp; &nbsp; cmpi.w&nbsp; &nbsp; #$1C00,d0&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ; Check X-axis boundary limit&nbsp; &nbsp; &nbsp; &nbsp; blo.s&nbsp; &nbsp; Tit_ChkRegion&nbsp; &nbsp; &nbsp; &nbsp; ; If less than $1C00, branch to continue.saveX:&nbsp; &nbsp; &nbsp; &nbsp; move.w&nbsp; &nbsp; d0,(v_objspace+obX).w ; Update the X position[/CODE]So, you can change the buttons to whatever you want.Happy hacking! <img src="https://cdn.jsdelivr.net/gh/twitter/twemoji@14.0.2/assets/72x72/1f600.png" class="smilie smilie--emoji" loading="lazy" width="72" height="72" alt=":D" title="Big grin&nbsp; &nbsp; :D"&nbsp; data-smilie="8"data-shortname=":D" /></blockquote>

[QUOTE="Mildanner, post: 6478, member: 7577"] So, you want to make a moveable title screen background for Sonic 1? Once the devs made it so known for having a famous moving right background, but what I do to move it? It's simple, go to your disassembly root and in [B]sonic.asm[/B] You should find a label with the name "Tit_MainLoop:" and find this simple piece of code [CODE] move.w (v_player+obX).w,d0 ; get current title screen position (big Sonic object) addq.w #2,d0 ; move it 2px to the right[/CODE] Sounds simple? You can change the 2 with the number you want and changing the speed of it. Replace it with this [CODE] move.w (v_objspace+obX).w,d0 move.b (v_jpadhold1).w,d1 ; Read pressed buttons ; --- Check B button to stop --- btst #4,d1 ; Is B button held? (bit 4) bne.s .ApplyMove ; If yes, skip movement (stops Sonic) ; --- Speed Logic (Right) --- btst #3,d1 ; Is Right held? (bit 3) bne.s .FastRight ; If yes, go to +4 speed addq.w #2,d0 ; Default: +2 speed bra.s .CheckLeft .FastRight: addq.w #4,d0 ; Fast: +4 speed ; --- Recoil Logic (Left) --- .CheckLeft: btst #2,d1 ; Is Left held? (bit 2) beq.s .ApplyMove ; If not, skip to applying movement subq.w #4,d0 ; If yes, subtract 4 (move backward) .ApplyMove: move.w d0,(v_objspace+obX).w ; Save the new X position cmpi.w #$1C00,d0 ; Check X-axis boundary limit blo.s Tit_ChkRegion ; If less than $1C00, branch to continue .saveX: move.w d0,(v_objspace+obX).w ; Update the X position[/CODE] So, you can change the buttons to whatever you want. Happy hacking! :D [/QUOTE]

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