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Layer 2 BG Autoscroll
Forum Index - SMW Hacking - SMW Hacking Help - Layer 2 BG Autoscroll
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How would I make the layer 2 BG of my level autoscroll? Also I have a layer 3 BG in use if that would affect anything.


Well, you can use any of the "layer 2 scroll" generator sprites; they still work even if Layer 2 is functioning as a background.

Past that, though, the only way is through some custom ASM. Set the Layer 2 background scroll (in #lm{othprops}) to "none", then insert a code like this to your level through UberASM Tool:

Code
!rate   =   $03     ; rate of autoscroll.
; smaller value = faster. valid values are 00, 01, 03, 07, 0F, 1F, 3F, 7F, and FF.

Main:
    LDA $14
    AND #!rate
    BNE +
    REP #$20
    INC $1466
    SEP #$20
  + RTL


To make the background scroll downwards instead of left, change $1466 to $1468. To make it scroll right/up instead of down/left, change "INC" to "DEC".

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Ah, thanks a bunch for the thorough response! I'll try this out when I get the chance.
Damn! This is pretty neat stuff that I never thought I needed! I will also give my thanks and use this.
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Forum Index - SMW Hacking - SMW Hacking Help - Layer 2 BG Autoscroll

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