Difference between revisions of "Generate Treasure"
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(Re-formatted routine documentation) |
(More notes on section 3) |
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00180a68: 00000000 nop | 00180a68: 00000000 nop | ||
| − | # SECTION 3 : NO VALID ITEMS : FIND USABLE ITEM | + | # SECTION 3 : NO VALID ITEMS : FIND USABLE CHEMIST ITEM (EXCEPT ELIXIR) |
00180a6c: 16000014 bne r16,r0,0x00180ac0 # IF ([Valid item count] = 0) | 00180a6c: 16000014 bne r16,r0,0x00180ac0 # IF ([Valid item count] = 0) | ||
| Line 46: | Line 46: | ||
00180a74: 0c0088c3 jal 0x0002230c # r2 = [Random number] | 00180a74: 0c0088c3 jal 0x0002230c # r2 = [Random number] | ||
00180a78: 00000000 nop | 00180a78: 00000000 nop | ||
| − | 00180a7c: 00021840 sll r3,r2,0x01 | + | 00180a7c: 00021840 sll r3,r2,0x01 # r2 = [Random number] * 13 |
00180a80: 00621821 addu r3,r3,r2 | 00180a80: 00621821 addu r3,r3,r2 | ||
00180a84: 00031880 sll r3,r3,0x02 | 00180a84: 00031880 sll r3,r3,0x02 | ||
00180a88: 00621021 addu r2,r3,r2 | 00180a88: 00621021 addu r2,r3,r2 | ||
| − | 00180a8c: 04410002 bgez r2,0x00180a98 | + | 00180a8c: 04410002 bgez r2,0x00180a98 # [Unnecessary negative check?] |
00180a90: 00000000 nop | 00180a90: 00000000 nop | ||
00180a94: 24427fff addiu r2,r2,0x7fff | 00180a94: 24427fff addiu r2,r2,0x7fff | ||
| − | 00180a98: 000213c3 sra r2,r2,0x0f | + | 00180a98: 000213c3 sra r2,r2,0x0f # r2 = roll(00,0D) #not including 0D |
| − | 00180a9c: 2442fff0 addiu r2,r2,0xfff0 # r2 = | + | 00180a9c: 2442fff0 addiu r2,r2,0xfff0 # r2 = roll(F0,FD) #random Item except Phoenix Down. |
00180aa0: a3a20010 sb r2,0x0010(r29) # ValidItems[0] (STACK[0x10]) = r2 | 00180aa0: a3a20010 sb r2,0x0010(r29) # ValidItems[0] (STACK[0x10]) = r2 | ||
00180aa4: 93a30010 lbu r3,0x0010(r29) # r3 = r2 | 00180aa4: 93a30010 lbu r3,0x0010(r29) # r3 = r2 | ||
| − | 00180aa8: 00000000 nop # | + | 00180aa8: 00000000 nop # ValidItemCount (r16) = 1 |
| − | 00180aac: 2c6200f5 sltiu r2,r3,0x00f5 # | + | 00180aac: 2c6200f5 sltiu r2,r3,0x00f5 # IF (r3 >= 0xf5) #F5 is Elixir |
| − | 00180ab0: 14400003 bne r2,r0,0x00180ac0 # | + | 00180ab0: 14400003 bne r2,r0,0x00180ac0 # { # Shift up by 1 to skip Elixir. |
| − | 00180ab4: 34100001 ori r16,r0,0x0001 # r2 = r3 + 1 | + | 00180ab4: 34100001 ori r16,r0,0x0001 # r2 = r3 + 1 #Elixir-Remedy -> Antidote-Phoenix |
00180ab8: 24620001 addiu r2,r3,0x0001 # ValidItems[0] = r2 | 00180ab8: 24620001 addiu r2,r3,0x0001 # ValidItems[0] = r2 | ||
00180abc: a3a20010 sb r2,0x0010(r29) # } | 00180abc: a3a20010 sb r2,0x0010(r29) # } | ||
| Line 81: | Line 81: | ||
00180af4: 03e00008 jr r31 # RETURN r2 | 00180af4: 03e00008 jr r31 # RETURN r2 | ||
00180af8: 00000000 nop | 00180af8: 00000000 nop | ||
| + | |||
| + | |||
| + | == Return Locations == | ||
| + | |||
| + | 001805d8: [[Generate Crystal or Treasure]] | ||
Latest revision as of 16:40, 11 October 2019
# ROUTINE : GENERATE TREASURE FOR TREASURE CHEST # # PARAMETERS: # r4 = [Treasure unit] # # RETURNS: # r2 = [Item]
# SECTION 1 : SET UP
00180a08: 3c028019 lui r2,0x8019 00180a0c: 8c42f5fc lw r2,-0x0a04(r2) # r2 = MEM[0x18f5fc] 00180a10: 27bdffe0 addiu r29,r29,0xffe0 00180a14: afbf001c sw r31,0x001c(r29) # IF (r2 != 0) 00180a18: 14400033 bne r2,r0,0x00180ae8 # RETURN r2 00180a1c: afb00018 sw r16,0x0018(r29) 00180a20: 00008021 addu r16,r0,r0 # r16 = 0 [Count of valid items] 00180a24: 00003021 addu r6,r0,r0 # r6 = 0 [Current equipment slot index] 00180a28: 27a50010 addiu r5,r29,0x0010 # r5 = [Valid item array pointer]
# SECTION 2 : FIND VALID ITEMS ON TREASURE UNIT (EQUIPMENT)
# DO {
00180a2c: 00861021 addu r2,r4,r6 #
00180a30: 9042001a lbu r2,0x001a(r2) # r2 = MEM[r4+r6+0x1a) [Equip] (Equipment in current slot of treasure unit)
00180a34: 00000000 nop
00180a38: a0a20000 sb r2,0x0000(r5) # ValidItems[i] (MEM[r5]) = [Equip]
00180a3c: 90a30000 lbu r3,0x0000(r5)
00180a40: 00000000 nop # r6++ (LoopCount++)
00180a44: 2c6200fe sltiu r2,r3,0x00fe # IF ([Equip] >= 0xFE) (empty)
00180a48: 10400005 beq r2,r0,0x00180a60 # CONTINUE (skip this item)
00180a4c: 24c60001 addiu r6,r6,0x0001
00180a50: 10600004 beq r3,r0,0x00180a64 # IF ([Equip] == 0x00)
00180a54: 28c20007 slti r2,r6,0x0007 # CONTINUE (skip this item)
00180a58: 24a50001 addiu r5,r5,0x0001 # r5++
00180a5c: 26100001 addiu r16,r16,0x0001 # r16++ (ValidItemCount++)
00180a60: 28c20007 slti r2,r6,0x0007
00180a64: 1440fff1 bne r2,r0,0x00180a2c # } WHILE (r6 < 7)
00180a68: 00000000 nop
# SECTION 3 : NO VALID ITEMS : FIND USABLE CHEMIST ITEM (EXCEPT ELIXIR)
00180a6c: 16000014 bne r16,r0,0x00180ac0 # IF ([Valid item count] = 0)
00180a70: 00000000 nop # {
00180a74: 0c0088c3 jal 0x0002230c # r2 = [Random number]
00180a78: 00000000 nop
00180a7c: 00021840 sll r3,r2,0x01 # r2 = [Random number] * 13
00180a80: 00621821 addu r3,r3,r2
00180a84: 00031880 sll r3,r3,0x02
00180a88: 00621021 addu r2,r3,r2
00180a8c: 04410002 bgez r2,0x00180a98 # [Unnecessary negative check?]
00180a90: 00000000 nop
00180a94: 24427fff addiu r2,r2,0x7fff
00180a98: 000213c3 sra r2,r2,0x0f # r2 = roll(00,0D) #not including 0D
00180a9c: 2442fff0 addiu r2,r2,0xfff0 # r2 = roll(F0,FD) #random Item except Phoenix Down.
00180aa0: a3a20010 sb r2,0x0010(r29) # ValidItems[0] (STACK[0x10]) = r2
00180aa4: 93a30010 lbu r3,0x0010(r29) # r3 = r2
00180aa8: 00000000 nop # ValidItemCount (r16) = 1
00180aac: 2c6200f5 sltiu r2,r3,0x00f5 # IF (r3 >= 0xf5) #F5 is Elixir
00180ab0: 14400003 bne r2,r0,0x00180ac0 # { # Shift up by 1 to skip Elixir.
00180ab4: 34100001 ori r16,r0,0x0001 # r2 = r3 + 1 #Elixir-Remedy -> Antidote-Phoenix
00180ab8: 24620001 addiu r2,r3,0x0001 # ValidItems[0] = r2
00180abc: a3a20010 sb r2,0x0010(r29) # }
# SECTION 4 : RETURN RANDOM ITEM FROM VALID ITEMS LIST
00180ac0: 0c0088c3 jal 0x0002230c # r2 = [Random number] 00180ac4: 00000000 nop 00180ac8: 00500018 mult r2,r16 00180acc: 00001012 mflo r2 # r2 = [Random index] 00180ad0: 04410003 bgez r2,0x00180ae0 00180ad4: 000233c3 sra r6,r2,0x0f 00180ad8: 24427fff addiu r2,r2,0x7fff 00180adc: 000233c3 sra r6,r2,0x0f 00180ae0: 03a61021 addu r2,r29,r6 00180ae4: 90420010 lbu r2,0x0010(r2) # r2 = ValidItems[RandomIndex] 00180ae8: 8fbf001c lw r31,0x001c(r29) 00180aec: 8fb00018 lw r16,0x0018(r29) 00180af0: 27bd0020 addiu r29,r29,0x0020 00180af4: 03e00008 jr r31 # RETURN r2 00180af8: 00000000 nop
Return Locations
001805d8: Generate Crystal or Treasure
