07-28-2015, 08:29 PM
This patch is inspired by Tenkarider in his Curse of the Gods mod.
Multicolor Chocobos has 4 different chocobo types:
Yellow: Normal chocobo
Red: Mountain chocobo
Blue: Water chocobo
Purple: "Flying" chocobo (sadly he does not fly, but can move everywhere)
To activate different chocobo types we use event bits $0E8 and $0E9.
Both are cleared for the normal chocobo,
$0E8 is set for red chocobo,
$0E9 is set for blue chocobo
Both are set for the purple chocobo
The basic patch implements only palette swapping and improved movement based on event bits $0E8 and $0E9. You need to set these bits yourself (in events) to allow the player access to new chocobos.
But, for fun we have the example IPS file to try this out.
The example IPS file will start a new game outside the WoB chocobo stables. You can head north enter the stables and the chocobo caretaker will allow you to pick any of the 4 chocobos you want.
Indepth:
Code added for the example IPS:
The patches are for a headered ROM.
Multicolor Chocobos has 4 different chocobo types:
Yellow: Normal chocobo
Red: Mountain chocobo
Blue: Water chocobo
Purple: "Flying" chocobo (sadly he does not fly, but can move everywhere)
To activate different chocobo types we use event bits $0E8 and $0E9.
Both are cleared for the normal chocobo,
$0E8 is set for red chocobo,
$0E9 is set for blue chocobo
Both are set for the purple chocobo
The basic patch implements only palette swapping and improved movement based on event bits $0E8 and $0E9. You need to set these bits yourself (in events) to allow the player access to new chocobos.
But, for fun we have the example IPS file to try this out.
The example IPS file will start a new game outside the WoB chocobo stables. You can head north enter the stables and the chocobo caretaker will allow you to pick any of the 4 chocobos you want.
Indepth:
Code:
# Chocobo Palettes
@ 14F900:
# Normal Chocobo Palette (yellow)
AD 35 63 0C 00 00 7F 03 00 00 0E 11 BC 2E 9F 4B
1B 02 39 67 FF 7F 92 21 1D 26 DF 57 DF 73 E3 6C
# Mountain Chocobo Palette (red)
1F 00 1F 00 1F 00 1F 00 1F 00 1F 00 1F 00 1F 00
1F 00 1F 00 1F 00 1F 00 1F 00 1F 00 1F 00 1F 00
# Water Chocobo Palette (blue)
00 7C 00 7C 00 7C 00 7C 00 7C 00 7C 00 7C 00 7C
00 7C 00 7C 00 7C 00 7C 00 7C 00 7C 00 7C 00 7C
# "Flying" Chocobo Palette (purple)
1F 7C 1F 7C 1F 7C 1F 7C 1F 7C 1F 7C 1F 7C 1F 7C
1F 7C 1F 7C 1F 7C 1F 7C 1F 7C 1F 7C 1F 7C 1F 7C
# MODE7: Chocobo Palette Hack
@ 2E89B6:
4C 01 AF # JMP $AF01
@ 2EB101:
C2 20 # REP #$20 (16-bit A)
AD 9D 1E # LDA $1E9D
29 03 00 # AND #$0003
0A # ASL A
0A # ASL A
0A # ASL A
0A # ASL A
0A # ASL A
AA # TAX
A0 00 00 # LDY #$0000 (Zero Y) ($00...)
BF 00 F7 D4 # LDA $D4F700,X (Chocobo color palettes)
99 20 E1 # STA $E120,Y (Save in RAM)
E8 # INX
E8 # INX (Point to next color in RAM)
C8 # INY
C8 # INY (Point to next color in RAM)
C0 20 00 # CPY #$0020 (Copied 16 colors?)
D0 F0 # BNE - (Loop if not)
AB # PLB (Restore data bank)
E2 20 # SEP #$20 (8-bit A)
AF 06 B2 EE # LDA $EEB206 (Pointer to sky graphics, low byte)
85 D2 # STA $D2 (Set source for decompression, low byte)
AF 07 B2 EE # LDA $EEB207 (Pointer to sky graphics, middle byte)
85 D3 # STA $D3 (Set source for decompression, middle byte)
AF 08 B2 EE # LDA $EEB208 (Pointer to sky graphics, high byte)
85 D4 # STA $D4 (Set source for decompression, high byte)
4C CB 87 # JMP $87CB
# Improved Movement for different color chocobos
@ 2E1D51:
4C 01 B0 # JMP $B001
EA EA EA EA
EA EA EA
# Free space used at $EEB001:
@ 2EB201:
C2 20 # REP #$20 (16-bit A)
AD 9D 1E # LDA $1E9D (chocobo type from event bits)
29 03 00 # AND #$03 (isolate bits)
85 1A # STA $1A (store to use with X later)
C2 10 # REP #$10 (16-bit indexes)
20 B5 1C # JSR $1CB5 (Tile properties)
89 01 00 # BIT #$0001 (Impassable for chocobos?)
D0 03 # BEQ $1B61 (Branch if not) (LSR A, BCC...)
4C 61 1B # JMP $1B61 (exit)
E2 10 # SEP #$10 (8-bit indexes)
29 0C 00 # AND #$000C (shadow cast by airship)
A6 1A # LDX $1A (chocobo type)
E0 00 # CPX #$0000 (normal chocobo)
D0 03 # BNE +03 (not normal chocobo)
4C 5B 1B # JMP $1B5B (prevent movement)
CA # DEX (mountain chocobo)
D0 08 # BNE +08 (not mountain chocobo)
C9 04 00 # CMP #$0008 (test for large airship shadow)
10 03 # BPL +03 (it's ok, mountain choco on a mountain)
4C 5B 1B # JMP $1B5B (prevent movement)
CA # DEX (water chocobo)
D0 08 # BNE +08 (not water chocobo)
C9 00 00 # CMP #$0000 (test for small airship shadow)
F0 03 # BPL +03 (it's ok, water choco in the water)
4C 5B 1B # JMP $1B5B (prevent movement)
4C 61 1B # JMP $1B61 (exit)
# Improve Dismount
@ 2E9572:
4C 01 B1 # JMP $B101
EA EA EA # NOP
# Free space used at $EEB101
@ 2EB301:
A5 20 # LDA $20 (Map mode)
C9 02 # CMP #$02 (Chocobo mode?)
F0 03 # BEQ +03 (Branch if so)
4C 78 93 # JMP $9378 (return to other modes)
A5 C2 # LDA $C2 (Tile properties, low byte)
89 01 # BIT #$01 (Impassable for chocobos?)
F0 03 # BEQ +03 (Branch if not)
4C 2C 94 # JMP $942C (exit)
4C D4 93 # JMP $93D4 (normal dismount)Code added for the example IPS:
Code:
# Text: Chocobo Bill
@ 0D9CF3:
15 7F 38 3E 45 45 48 50 01 # > Yellow
15 7F 31 3E 3D 01 # > Red
15 7F 21 45 4E 3E 01 # > Blue
15 7F 2F 4E 4B 49 45 3E # > Purple
00
# NPC Event: Chocobo Bill
@ 0C3504:
4B A7 83 # Choice dialogue
97 # fade to black
B6
3D 33 02 # Picked Yellow
45 33 02 # Picked Red
4D 33 02 # Picked Blue
55 33 02 # Picked Green
FE
@ 0C353D:
D1 E8 # Picked Yellow
D1 E9
B2 83 33 02
D0 E8 # Picked Red
D1 E9
B2 83 33 02
D1 E8 # Picked Blue
D0 E9
B2 83 33 02
D0 E8 # Picked Purple
D0 E9
B2 83 33 02
FE
# Event: Intro
@ 0C9A5B:
6B 00 24 36 56 00
FF
# Event: New game stuff
@ 0A6033: A9 # Show title screen
7F 00 00 # NAME 00 -> 00
40 00 00 # Set properties
3D 00 # Create Character
3F 00 01 # Assign char to party
37 00 00 # sprites for char 00
43 00 00 # palette for char 00
7F 01 01 # NAME 01 -> 01
40 01 01 # Set properties
3D 01 # Create Character
3F 01 01 # Assign char to party
37 01 01 # sprites for char 01
43 01 01 # palette for char 01
D4 E0 # Event bit 20E (on)
D4 F0 # Event bit 20F (on)
3C 00 01 FF FF # Set party
46 01 # Select party 1
D2 0B # Event bit 10B (on)
D2 E3 # Event bit 1E3 (on)
6C 00 00 75 3D 00 # Start location in WoB
82 88 5E # Subroutine new game/loading
FEThe patches are for a headered ROM.