.gba
.open "ZM_U.gba","TestASM.gba",0x8000000

.definelabel SpriteID,0x6c

.definelabel SpriteAIPointers,0x875E8C0
.definelabel FreeSpace,0x8760d50

.definelabel EffectYPositionOffset,0x300006e
.definelabel BG0YPosition,0x30000E4

.org SpriteAIPointers + SpriteID * 4
    .dw FreeSpace+1

.org FreeSpace
    push r14
    ldr r0,=EffectYPositionOffset
    ldrh r1,[r0,#0x0]
    sub r1,#0x3
    strh r1,[r0,#0x0]
    ldr r0,=BG0YPosition
    ldrh r1,[r0,#0x0]
    add r1,#0x3
    strh r1,[r0,#0x0]
    pop r0
    bx r0
    .pool
    
.close