FF7/Field/Script/Opcodes/2D BGSCR

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  • Opcode: 0x2D
  • Short name: BGSCR
  • Long name: Background Scroll

Memory layout

0x2D B1 / B2 L X Y

Arguments

  • const Bit[4] B1: Bank to retrieve value for X, or zero if X is specified as a literal.
  • const Bit[4] B2: Bank to retrieve value for Y, or zero if Y is specified as a literal.
  • const UByte L: ID number of the layer to manipulate.
  • const Short X: Speed of the scroll in the X direction; positive values indicate right-to-left scrolling.
  • const Short Y: Speed of the scroll in the Y direction; positive values indicate bottom-to-top scrolling.

Description

Scrolls the background layer specified by L. This opcode will only scroll those extra layers above the standard background and foreground layers (0/1, respectively), and so should be an argument of 2 or greater. The X and Y speeds are signed; positive values scroll from right-to-left and bottom-to-top, whilst negative values scroll from left-to-right and top-to-bottom.

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