Get Unit's Data Pointer

00180afc: 2c820015 sltiu r2,r4,0x0015
00180b00: 10400007 beq r2,r0,0x00180b20		Branch if ID >= 0x15
00180b04: 000410c0 sll r2,r4,0x03		ID * 8
00180b08: 00441023 subu r2,r2,r4		ID * 7
00180b0c: 00021180 sll r2,r2,0x06		ID * 448
00180b10: 3c038019 lui r3,0x8019
00180b14: 246308cc addiu r3,r3,0x08cc
00180b18: 080602c9 j 0x00180b24
00180b1c: 00431021 addu r2,r2,r3		r2 = Unit's Data Pointer
00180b20: 00001021 addu r2,r0,r0		r2 = 0
00180b24: 03e00008 jr r31
00180b28: 00000000 nop