Wew I haven't posted in a while. Yo, so I'm working on a disassembly of Sonic CD 0.02. I've got most of the files including R11A done, just a matter of commenting and identifying what's left, comparing against the other level MMDs, and then splitting it all out into files. Figured I'd make a thread about it for the time being, also just to have a place to post discoveries. Speaking of which, there is some junk data towards the end of the rom with the previous iteration of the level complete object: Code: ; obj_LevelEnd - Level end marker (Pre-YouSay) ; ; Routines ; 00 - Init - Object is initialized and set to monitor state ; 01 - Col - Object position checked relative to Sonic ; If exceeded, execute level end routine ; 02 - Exec - Execute level end routine, count down $2A(a0) ; Sonic can move about the screen for $2A(a0) counts ; 03 - Count - Perform the $2A(a0) countdown then lock controls ; and run Sonic off right side of screen ; 04 - Ret - Level end routine return loop. Triggers level end if ; counters are expended. ; ; Custom Variables ; 2A - Count for Sonic to remain movable on screen ; 2B - Time for Sonic to run offscreen ; ; Imports ; ; sub_Sonica6 -> Points a6 at the player character ram bank ; obj_LevelEnd: moveq #0,d0 move.b obRoutine(a0),d0 move.w ind_LevelEnd(pc,d0.w),d0 jsr ind_LevelEnd(pc,d0.w) rts ind_LevelEnd: dc.w LevelEnd_Init-ind_LevelEnd dc.w LevelEnd_Col-ind_LevelEnd dc.w LevelEnd_Exec-ind_LevelEnd dc.w LevelEnd_Count-ind_LevelEnd dc.w LevelEnd_Ret-ind_LevelEnd ; --------------------------------------------------------------------------- LevelEnd_Init: addq.b #2,obRoutine(a0) ; Trigger collision checking state ori.b #4,obRender(a0) move.b #4,obPriority(a0) ; --------------------------------------------------------------------------- LevelEnd_Col: jsr sub_Sonica6 ; a6 -> Player move.w obX(a0),d0 ; Check Sonic's position cmp.w obX(a6),d0 ; Relative to X coordinate bcc.s @return ; If carry set, Sonic has passed move.w (v_limitright2).w,(v_limitleft2).w ; Prevent moving left move.b #$3C,$2A(a0) ; Time to wait on screen move.b #$B4,$2B(a0) ; Time for Sonic to run off-screen move.b #$F0,$2B(a0) addq.b #2,obRoutine(a0) ; Trigger waiting state @return: rts ; --------------------------------------------------------------------------- LevelEnd_Exec: subq.b #1,$2A(a0) bne.s LevelEnd_Count ; Let Sonic run around for a bit addq.b #2,obRoutine(a0) ; Trigger run off state LevelEnd_Count: subq.b #1,$2B(a0) bne.s LevelEnd_Ret bset #0,(f_lockctrl).w ; Lock controls move.b #0,obAnim(a0) move.w #$808,(v_jpadhold2).w ; Make Sonic run right addq.b #2,obRoutine(a0) ; Trigger run off wait LevelEnd_Ret: subq.b #1,$2B(a0) bne.s @return move.w #2,(f_restart).l ; Trigger level cycle @return: rts Going to hopefully be putting together a release of what I have done so far, I've got all the IDBs and just need to work them down into something a little easier on the eyes.
