00123430 - 00123504

00123430: 27bdff20 addiu r29,r29,0xff20
00123434: afb400d0 sw r20,0x00d0(r29)
00123438: 0080a021 addu r20,r4,r0			#that's not a stack pointer? ~0x8018ab40?
0012343c: afb200c8 sw r18,0x00c8(r29)
00123440: 00a09021 addu r18,r5,r0			#that is also not a stack pointer? ~0x8018aa98
00123444: afb100c4 sw r17,0x00c4(r29)
00123448: 00c08821 addu r17,r6,r0			#
0012344c: afb000c0 sw r16,0x00c0(r29)
00123450: 00e08021 addu r16,r7,r0			#
00123454: 02402021 addu r4,r18,r0
00123458: 02802821 addu r5,r20,r0
0012345c: afbf00d8 sw r31,0x00d8(r29)
00123460: afb500d4 sw r21,0x00d4(r29)
00123464: 0c048b90 jal 0x00122e40			#Clear 0xe-0xf and 0x14-0x15 from r4 pointer, clear from 0x00 to 0x23 from r5 pointer
00123468: afb300cc sw r19,0x00cc(r29)
0012346c: 00009821 addu r19,r0,r0			#r19 counter = 0
00123470: 27b50040 addiu r21,r29,0x0040
00123474: 02a02021 addu r4,r21,r0			#r4 input = stack + 0x40 (for the everything else difference in bonus)
00123478: 27a50018 addiu r5,r29,0x0018			#r5 input = stack + 0x18 (for HP/MP difference in bonus)
0012347c: 96260000 lhu r6,0x0000(r17)			#load new item?
00123480: 96070000 lhu r7,0x0000(r16)			#load old item?
00123484: 26100002 addiu r16,r16,0x0002
00123488: afb30010 sw r19,0x0010(r29)
0012348c: 30c603ff andi r6,r6,0x03ff
00123490: 0c048c73 jal 0x001231cc			#001231cc - 00123284 Item Preview math (load equipment values, store old vs new to stack)
00123494: 30e703ff andi r7,r7,0x03ff
00123498: 02802021 addu r4,r20,r0			#r4 as store again to same space
0012349c: 02802821 addu r5,r20,r0			#r5 as accumulative equipment stat bonuses
001234a0: 02a03021 addu r6,r21,r0			#r6 input = stack + 0x40 (everything else bonus calculated before)
001234a4: 0c048ca2 jal 0x00123288			#00123288 - 0012342c 
001234a8: 2407ffff addiu r7,r0,0xffff			#r7 = -1 stat multiplier (instead of subtracting, *add* accumulative bonus and new bonus)
001234ac: 9642000e lhu r2,0x000e(r18)			#load accumulative HP difference
001234b0: 97a30026 lhu r3,0x0026(r29)			#load HP difference in bonus
001234b4: 00000000 nop
001234b8: 00431021 addu r2,r2,r3
001234bc: a642000e sh r2,0x000e(r18)			#store HP difference in bonus
001234c0: 96420014 lhu r2,0x0014(r18)			#load accumulative MP difference
001234c4: 97a3002c lhu r3,0x002c(r29)
001234c8: 26730001 addiu r19,r19,0x0001		#increase r19 by 1
001234cc: 00431021 addu r2,r2,r3
001234d0: a6420014 sh r2,0x0014(r18)			#store mp difference in bonus
001234d4: 2a620005 slti r2,r19,0x0005			#set if still not done checking all 5 equipment slots
001234d8: 1440ffe6 bne r2,r0,0x00123474		#loop
001234dc: 26310002 addiu r17,r17,0x0002		#check next equipment
001234e0: 8fbf00d8 lw r31,0x00d8(r29)
001234e4: 8fb500d4 lw r21,0x00d4(r29)
001234e8: 8fb400d0 lw r20,0x00d0(r29)
001234ec: 8fb300cc lw r19,0x00cc(r29)
001234f0: 8fb200c8 lw r18,0x00c8(r29)
001234f4: 8fb100c4 lw r17,0x00c4(r29)
001234f8: 8fb000c0 lw r16,0x00c0(r29)
001234fc: 27bd00e0 addiu r29,r29,0x00e0
00123500: 03e00008 jr r31
00123504: 00000000 nop

Return locations:
0011af4c - 0011b550: 0x0011b3cc