Get Header before Motion Data Address

001a1010: 00042400 sll r4,r4,0x10
001a1014: 00042383 sra r4,r4,0x0e
001a1018: 3c01801b lui r1,0x801b
001a101c: 00240821 addu r1,r1,r4
001a1020: 8c2248d0 lw r2,0x48d0(r1)		load effect data
001a1024: 00000000 nop
001a1028: 8c430008 lw r3,0x0008(r2)		0x08 of effect data???
001a102c: 00000000 nop
001a1030: 00431021 addu r2,r2,r3
001a1034: 3c01801c lui r1,0x801c
001a1038: ac22c094 sw r2,-0x3f6c(r1)
001a103c: 03e00008 jr r31
001a1040: 00000000 nop