Daffy Duck: The Marvin Missions (SNES)

Daffy Duck: The Marvin Missions takes many cues from the famous "Duck Dodgers" shorts, so much so that it's pretty baffling why they didn't just call the game Duck Dodgers.

To do:
Prototype.

Uncompiled Source Code#

Large chunks of uncompiled source code are in the American sample ROM at 0x47400 and 0x4F400, while the European release just has a small chunk at 0x37F2A.

00      ; 16 bit accu.
    LONGA   ON
    inc ep1
    lda et1         ; Current Address
    sta [ep1]
    inc ep1         ; bump hma pointer
    inc ep1
    dec et2         ; keep going until complete
    bne .15

    inc et1         ; bump var used
    inc et1
    bra .10

.40 sep #%00100000      ; 8 bit accu.
    LONGA   OFF
    lda #$81            ; 1 at a time
    sta [ep1]
    rep #%00100000      ; 16 bit accu.
    LONGA   ON
    inc ep1
    lda et1         ; Current Address
    sta [ep1]
    inc ep1
    inc ep1
    lda ep1
    cmp #(HDMAMiscTable+$0ef0)  ; Reached the end?
    bcc .40
    lda #$0000          ; End
    sta [ep1]
    inc ep1
    inc ep1
    sta [ep1]

    lda #HDMAVarSpace
    sta ep1
    ldx #|HDMAVarSpace
    stx ep1+2
    stx $4377           ; Data Bank for HDMA

    lda #$0000
    ldy #$80
.80 sta [ep1],y         ; Clear out var. space
    dey
    dey
    bpl .80

.90 plb             ; Restore DBR
    plp
    rtl
;----------------------------------------------------------------------------
Build_Level_HDMA:
    php

    sep #%00100000      ; 8 bit accumulator
    LONGA   OFF
    phb             ; Save current DBR
    lda #|(.10)-1       ; Push current bank #
    pha
    rep #%00100000      ; 16 bit accumulator
    LONGA   ON
    lda #(.10)-1        ; Return address on stack
    pha

    sep #%00100000      ; 8 bit accumulator
    LONGA   OFF
    lda LevelInitBank
    pha
    pha
    plb             ; Set DBR same as init code
    rep #%00100000      ; 16 bit accumulator
    LONGA   ON

    lda LevelInitCode
    clc
    adc #12         ; Get to 5th spot (HDMA Update)
    pha
    rtl             ; Special JMP

.10 plb             ; Restore DBR
    plp             ; Restore processor status
    rtl
;----------------------------------------------------------------------------
Check_For_Pause:
    php
    rep #%00100000      ; 16 bit accu.
    LONGA   ON
    lda DDStartCtrl
    beq .90
    lda #1
    sta GamePaused

    lda CurrentLevel
    and #%0000000000000011
    cmp #%0000000000000011  ; End-Boss level?
    beq .30         ; skip radar if End-Boss
;   lda StatusBarUpdate
;   ora #Update_PauseOn     ; Update pause display
;   sta StatusBarUpdate

    jsl MakeRadar
    jsl Wait_For_VBL
    jsl Draw_Radar      ; Draw radar to screen

    jsl Init_PauseBlink     ; Initialize blinking dot

.30 jsl Wait_For_VBL
    jsl Update_Status_Bar   ; Update energy & life bar
    jsl Read_DD_Controls    ; Get controls for DD
    lda CurrentLevel
    and #%0000000000000011
    cmp #%0000000000000011  ; End-Boss level?
    beq .35         ; skip radar if End-Boss
    jsl Update_PauseBlink

.35 lda DDStartCtrl
    beq .30

    jsl Clear_Radar     ; Clear Radar image

    lda StatusBarUpdate
    ora #Update_PauseOff    ; Update pause display
    sta StatusBarUpdate

.90 stz GamePaused
    plp
    rtl
;----------------------------------------------------------------------------
; Duck Dodgers object
; -------------------
; UserWrd --> Timer for Sleep Frame changes
; UsrWrd2 --> Sleep Frame for nutty
; UsrWrd3 --> Ptr. to Nutty Delta List
; UsrWrd4 --> Timer for Nutty Deltas
; UsrWrd5 --> Direction for Nutty Sleep Frame changes (0=faster 1=slower)
; UsrWrd6 --> Old Scroll obj. (for use with nutty)
; SftCtrl --> Copy of SATCtrl (used by Nutty and "Think" pose)
;----------------------------------------------------------------------------
Init_DuckDodgers:
    php
    rep #%00100000

2   lda #DDStndR        ; stand / face right
    jsl Poke_Anim
    jmp .90

; Get correct friction for current platform
.15
;   jsl Get_Bottom_Coordinates
;   jsl Get_Character_Info
;   lda ObjType

    lda Obj3CharType
    bit #Stamp_Ice
    bne .16
    lda #Duck_StandFriction
    bra .17
.16 lda #Duck_IceStandFriction
.17 sta ot3
    eor #$ffff
    inc a
    sta ot4

; Apply friction for standing (looking up)
    lda X_Delta,x
    beq .70         ; skip this if not moving
    bmi .30         ; branch if moving left

    cmp ot3
    bcc .60         ; stop duck if moving too slow
    sec
    sbc ot3         ; Slow duck down
    sta X_Delta,x
    bra .70
.30 cmp ot4
    bcs .60
    clc
    adc ot3
    sta X_Delta,x
    bra .70
.60 stz X_Delta,x       ; Stop duck from moving

; check to see if duck wants to crouch in a new direction
.70 lda DDLeftCtrl
    beq .80
    lda SATCtrl,x
    bit #Obj_XFlip      ; Is duck facing left?
    bne .90         ; branch if he is...
    ora #Obj_XFlip      ; Face duck to the left
    sta SATCtrl,x
    lda #DDLookL        ; Make duck look up / left
    jsl Poke_Anim
    lda #2          ; keep in frame #2
    sta Frame,x
    lda #1
    jsl Do_Anim         ; update frame
    bra .90

.80 lda DDRightCtrl
    beq .90
    lda SATCtrl,x
    bit #Obj_XFlip      ; Is duck facing right?
    beq .90         ; branch if he is...
    and #$ffff-Obj_XFlip    ; Face duck to the right
    sta SATCtrl,x
    lda #DDLookR        ; Make duck look up / right
    jsl Poke_Anim
    lda #2          ; keep in frame #3
    sta Frame,x
    lda #1
    jsl Do_Anim         ; update frame

.90 rts
;----------------------------------------------------------------------------
Duck_ShootUp:
    jsl Adjust_For_45       ; Fix Y Coordinate if Duck is on 45
    beq .1
    jmp .90
.1  jsl Check_For_Sides
    cmp #2          ; pain?
    bne .2
    lda #1          ; 1 damage
    jsl Hurt_DuckDodgers
    jmp .90

.2  lda DDShield
    bne .3          ; Don't check pain if DD has shield
    jsl Get_Middle_Coordinates  ; Check middle
    jsl Get_Character_Info
    lda ObjType
    bit #Stamp_Pain
    beq .3
    lda #1          ; 1 damage
    jsl Hurt_DuckDodgers        ; Hurt duck who crouches in pain!!
    jmp .90

.3  jsr Check_Evil_Collision
    beq .4
    jmp .90         ; leave early if hurt/dead
.4  jsr Check_For_Fall
    beq .10
    jmp .90         ; leave if duck has fallen

; Get correct friction for current platform
.10
;   jsl Get_Bottom_Coordinates
;   jsl Get_Character_Info
;   lda ObjType
    lda Obj3CharType
    bit #Stamp_Ice
    bne .16
    lda #Duck_StandFriction
    bra .17
.16 lda #Duck_IceStandFriction
.17 sta ot3
    eor #$ffff
    inc a
    sta ot4

; Apply friction for standing (shooting up)
    lda X_Delta,x
    beq .70         ; skip this if not moving
    bmi .30         ; branch if moving left

    cmp ot3
    bcc .60         ; stop duck if moving too slow
    sec
    sbc ot3         ; Slow duck down
    sta X_Delta,x
    bra .70
.30 cmp ot4
    bcs .60
    clc
    adc ot3
    sta X_Delta,x
    bra .70
.60 stz X_Delta,x       ; Stop duck from moving

.70 lda SlpTime,x
    cmp #1          ; End of frame?
    bne .90         ; branch if not..
    lda SATCtrl,x
    bit #Obj_XFlip      ; which way is duck facing?
    beq .80         ; branch if facing right
    lda #DDLookL        ; Make duck look up / left
    bra .85
.80 lda #DDLookR        ; Make duck look up / right
.85 jsl Poke_A

kPGrowY:
    dw  $8000,$8000,$8000,$8000
;----------------------------------------------------------------------------
MrtGun0 dw  $0001,$ffff,MG0PAT,$0000,$0000,$0000
    dw  $0000,$0000,$0000,$0000,$0000,$ffff
MG0PAT

References#

SNES Games (archived)↩︎
www.NINTENDO.se - Spel - Super NES (archived)↩︎
Playtronic e Tec Toy trazem novos cartuchos "Playtronic and Tec Toy bring new cartridges" - O Estado de S. Paulo, February 21, 1994↩︎

v · t · e The Looney Tunes series
Game Boy	Looney Tunes
SNES	ACME Animation Factory • Looney Tunes B-Ball (Prototype)
Game Boy Color	Looney Tunes • Looney Tunes Collector: Alert! (Prototypes) • Marvin Strikes Back!
DOS	Space Jam
Sega Saturn	Space Jam
PlayStation	Space Jam • Racing • Sheep Raider
PlayStation 2	Space Race • Back in Action • Acme Arsenal
Dreamcast	Space Race (Prototype)
Xbox	Loons: The Fight for Fame
GameCube	Back in Action
Wii, Xbox 360	Acme Arsenal
Windows	Animated Jigsaws • Sheep Raider
Game Boy Advance	Back in Action • Double Pack: Dizzy Driving/Acme Antics
Android/iOS	Looney Tunes Dash! • World of Mayhem
Adobe Flash	The Island of Dr. Moron • There Goes the Neighborhood

Bugs Bunny
Atari 2600	Bugs Bunny
NES	Crazy Castle (Prototype) • Birthday Blowout (Prototype)
DOS	Hare-Brained Adventure
Genesis	Double Trouble
SNES	Rabbit Rampage
Game Boy (Color)	Crazy Castle • Crazy Castle II • Crazy Castle 3 • Bugs Bunny Collection • Carrot Crazy
PlayStation, Windows	Lost in Time • Bugs Bunny & Taz: Time Busters
Adobe Flash	Beanstalk Bunny and the Abominable Snow Rabbit

Daffy Duck
DOS	The Case of the Missing Letters
Sega Master System, Game Gear	Daffy Duck in Hollywood
Genesis	Daffy Duck in Hollywood (Prototype)
SNES	The Marvin Missions
Nintendo 64	Duck Dodgers
Game Boy (Color)	The Marvin Missions • Fowl Play
Nintendo DS	Duck Amuck
Adobe Flash	Behold the Wizard!

Marvin the Martian
Adobe Flash	Marvin's Space Bowling

Porky Pig
SNES	Porky Pig's Haunted Holiday (Prototypes)

Road Runner & Wile E. Coyote
Arcade	Road Runner
NES	Road Runner
DOS	Road Runner
Genesis	Desert Demolition (Prototypes)
SNES	Road Runner's Death Valley Rally • Wile E. Coyote's Revenge
Game Gear, Sega Master System	Desert Speedtrap

Speedy Gonzales
Genesis	Cheese Cat-astrophe
SNES	Los Gatos Bandidos
Game Boy Color	Aztec Adventure (Japanese Prototype)

Sylvester & Tweety
Genesis	Cagey Capers (Prototype)
Game Boy Color	Tweety's High-Flying Adventure • Twouble!
Adobe Shockwave	Ski-Daddle!
Adobe Flash	Tweety Saves the Day

Taz
Atari 2600	Taz
Sega Master System	Taz-Mania
Game Gear	Taz-Mania • Escape from Mars
Genesis	Taz-Mania • Escape from Mars (Prototypes)
SNES	Taz-Mania (Prototype)
Game Boy	Taz-Mania 2 (Prototype)
PlayStation, Windows	Bugs Bunny & Taz: Time Busters
Nintendo DS	Galactic Taz Ball
GameCube, Xbox, PlayStation 2, Windows	Taz: Wanted (Prototypes)
Nintendo 64	Taz Express
Adobe Flash	Extreme Taz: Skateboard Street Course • Extreme Taz: Skateboard Halfpipe • Taz' Football Frenzy

See Also
Tiny Toon Adventures • Animaniacs • Cartoon Network • DC Comics