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ASM to Sega Genesis Platform

All about assembly programming in the Sega Genesis console.


    How to Edit the Time on the title Screen (Tutorial)

    calebjhuhlu
    calebjhuhlu

    Mensagens : 55
    Data de inscrição : 2011-06-16

    How to Edit the Time on the title Screen (Tutorial) Empty How to Edit the Time on the title Screen (Tutorial)

    Post  calebjhuhlu Mon Jun 20, 2011 6:48 pm

    Have you ever wanted to Put different music for your Titlescreen, but didnt know how to edit the time it shows up? Well now you can! start by opening you sonic1.asm

    Go to Title_LoadText You will see this:

    Code:


    Title_LoadText:
          move.w   (a5)+,(a6)
          dbf   d1,Title_LoadText ; load uncompressed text patterns

          move.b   #0,($FFFFFE30).w ; clear lamppost counter
          move.w   #0,($FFFFFE08).w ; disable debug item placement   mode
          move.w   #0,($FFFFFFF0).w ; disable debug mode
          move.w   #0,($FFFFFFEA).w
          move.w   #0,($FFFFFE10).w ; set level to   GHZ (00)
          move.w   #0,($FFFFF634).w ; disable pallet cycling
          bsr.w   LevelSizeLoad
          bsr.w   DeformBgLayer
          lea   ($FFFFB000).w,a1
          lea   (Blk16_GHZ).l,a0 ; load   GHZ 16x16 mappings
          move.w   #0,d0
          bsr.w   EniDec
          lea   (Blk256_GHZ).l,a0 ; load GHZ 256x256 mappings
          lea   ($FF0000).l,a1
          bsr.w   KosDec
          bsr.w   LevelLayoutLoad
          bsr.w   Pal_FadeFrom
          move   #$2700,sr
          bsr.w   ClearScreen
          lea   ($C00004).l,a5
          lea   ($C00000).l,a6
          lea   ($FFFFF708).w,a3
          lea   ($FFFFA440).w,a4
          move.w   #$6000,d2
          bsr.w   LoadTilesFromStart2
          lea   ($FF0000).l,a1
          lea   (Eni_Title).l,a0 ; load   title screen mappings
          move.w   #0,d0
          bsr.w   EniDec
          lea   ($FF0000).l,a1
          move.l   #$42060003,d0
          moveq   #$21,d1
          moveq   #$15,d2
          bsr.w   ShowVDPGraphics
          move.l   #$40000000,($C00004).l
          lea   (Nem_GHZ_1st).l,a0 ; load GHZ patterns
          bsr.w   NemDec
          moveq   #1,d0      ; load title screen pallet
          bsr.w   PalLoad1
          move.b   #$8B,d0      ; play title screen music
          bsr.w   PlaySound_Special
          move.b   #0,($FFFFFFFA).w ; disable debug mode
          move.w   #$178,($FFFFF614).w ; run title   screen for $178   frames
          lea   ($FFFFD080).w,a1
          jsr   DeleteObject2
          move.b   #$E,($FFFFD040).w ; load big Sonic object
          move.b   #$F,($FFFFD080).w ; load "PRESS   START BUTTON" object
          move.b   #$F,($FFFFD0C0).w ; load "TM" object
          move.b   #3,($FFFFD0DA).w
          move.b   #$F,($FFFFD100).w
          move.b   #2,($FFFFD11A).w
          jsr   ObjectsLoad
          bsr.w   DeformBgLayer
          jsr   BuildSprites
          moveq   #0,d0
          bsr.w   LoadPLC2
          move.w   #0,($FFFFFFE4).w
          move.w   #0,($FFFFFFE6).w
          move.w   ($FFFFF60C).w,d0
          ori.b   #$40,d0
          move.w   d0,($C00004).l
          bsr.w   Pal_FadeTo

    On this Line:

    Code:
    move.w   #$178,($FFFFF614).w ; run title   screen for $178   frames

    Modify 178 to how many frames you want, Example:

    Code:
    move.w   #$365,($FFFFF614).w ; run title   screen for $365   frames

    The Code above is how long you need it too be if you modify the music to 8B

    Now, to edit the music being played:

    in the same area look for:

    Code:
          move.b   #$8A,d0      ; play title screen music

    Modify 8A to any sound you wish.

    And thats how to edit the time the Title screen is displayed and how to edit the music it plays.
    SonicVaan
    SonicVaan

    Mensagens : 100502
    Data de inscrição : 2013-07-25
    Localização : ASMTSG
    Current Project : BEING THE KING OF THE FORUM

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    Post  SonicVaan Thu Dec 19, 2013 1:29 pm

    Thanks! This will help me alot with my new project! You'll be in the credits.
    Electroball_
    Electroball_

    Mensagens : 2127
    Data de inscrição : 2013-11-26
    Current Project : who cares

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    Post  Electroball_ Thu Dec 19, 2013 2:05 pm

    Lawl.
    avatar
    JoshDP

    Mensagens : 1682
    Data de inscrição : 2014-10-05

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    Post  JoshDP Thu Dec 27, 2018 10:39 am

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