Skip to navigation


Drawing sprites: HideMoreSprites

[NES version, Bank 7]

Name: HideMoreSprites [Show more] Type: Subroutine Category: Drawing sprites Summary: Hide X + 1 sprites from sprite Y / 4 onwards
Context: See this subroutine in context in the source code References: This subroutine is called as follows: * HideMostSprites calls HideMoreSprites

This routine is similar to HideSprites, except it hides X + 1 sprites rather than X sprites.
Arguments: X The number of sprites to hide (we hide X + 1) Y The number of the first sprite to hide * 4
.HideMoreSprites LDA #240 ; Set A to the y-coordinate that's just below the bottom ; of the screen, so we can hide the required sprites by ; moving them off-screen .hisp1 STA ySprite0,Y ; Set the y-coordinate for sprite Y / 4 to 240 to hide ; it (the division by four is because each sprite in the ; sprite buffer has four bytes of data) INY ; Add 4 to Y so it points to the next sprite's data in INY ; the sprite buffer INY INY DEX ; Decrement the loop counter in X BPL hisp1 ; Loop back until we have hidden X + 1 sprites RTS ; Return from the subroutine