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7800Basic "Bouncy" Backgrounds


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I've been trying to alleviate bouncy or jittery backgrounds in which I have bars of several colors and different sizes. When the player moves, the bouncing is very noticable.  When there is no movement, the backgrounds are stable.

 

I've tried using some asm code like this:

 

  asm
  lda #$ac ; stick your background here
  sta WSYNC ; start a new scanline
  sta BACKGRND
end
 
  asm
  lda #$76 ; stick your background here
  sta WSYNC ; start a new scanline
  sta WSYNC
  sta WSYNC
  sta WSYNC
  sta BACKGRND
end


  asm
  lda #$9b ; stick your background here
  sta WSYNC ; start a new scanline
  sta WSYNC
  sta WSYNC
  sta WSYNC
  sta WSYNC
  sta WSYNC
  sta WSYNC
  sta WSYNC
  sta WSYNC
  sta WSYNC
  sta WSYNC
  sta WSYNC
  
  sta BACKGRND
end

 

 

I must be missing something or using too many WSYNC commands.  

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