Dorke and Ymp is a commercially-released homebrew SNES platformer that was originally developed by a small team of Swedish hobbyists in the early 90s, who eventually shelved the game after failing to find a publisher.
A few prototype builds were released online, with homebrew publisher Piko Interactive later being responsible for the game being finished and given a physical cartridge release. A Steam release using a customized version of the Mednafen emulator followed about a year later.
Uncompiled Code#
Various fragments of audio-related source code are scattered throughout part of the ROM, possibly as a result of unused ROM space being filled with uninitialized memory.
At offset 15B000:
;-------------------------------------------------
;- TEMPLATE FOR A NEW SPCBANK -
;-------------------------------------------------
DONOTDEFINETRANSFEREND:
INCLUDE SPCPLAYR.SPC ; INCLUDE THE SPCPLAYR ROUTINES
;---------------------------------------------------------------
; --------- SPCOBJECT IS THE BASE FOR THE WHOLE ------------
; --------- BANK OF SONGS AND SOUND EFFECTS ------------
; --------- IT MUST BE DEFINED IN ORDER FOR THE ------------
; --------- APUINIT BEING ABLE TO INSTALL ------------
SPCOBJECT:
DB $FF ; MASTERVOL
DB $01 ; (MONO)/STEREO
DB $B0 ; DEFAULT SFXVOL
DB $D0 ; DEFAULT SONGVOL
DW SFXLIST ; ADDR OF SFXLIST
DW SONGLIST ; ADDR OF SONGLIST
SONGLIST:
DW CLOUDSONG
SFXLIST:
DW SFXDORQUEHIT
DW SFXIMPSPIT
DW SFXPULLEVER
DW SFXCREATHIT
DW SFXPICKUPTHING
DW SFXTHINGLANDED
DW SFXEXPLOSION
DW SFXCHESTOPEN
;---------------------------------------------------------------
; INCLUDES FOR SFX
SFXCREATHIT:
INCLUDE CREATHIT.DFX
SFXDORQUEHIT:
INCLUDE DRQUEHIT.DFX
SFXIMPSPIT:
INCLUDE IMPSPIT.DFX
SFXPICKUPTHING:
INCLUDE PICKUP.DFX
SFXTHINGLANDED:
INCLUDE THINGLND.DFX
SFXEXPLOSION:
INCLUDE BOMBEXPL.DFX
SFXCHESTOPEN:
INCLUDE CHESTOPN.DFX
SFXPULLEVER:
INCLUDE PULLEVER.DFX
;---------------------------------------------------------------
; INCLUDES FOR SONG
CLOUDSONG: INCLUDE CLOUDS.DSC
SYNBASS1: INCLUDE SYNBASS1.DSC
SHAKER2: INCLUDE SHAKER2.DSC
DRYBDRUM: INCLUDE DRYBDRUM.DSC
TRIMUTE: INCLUDE TRIMUTE.DSC
TRIANGLE: INCLUDE TRIANGLE.DSC
ANWMIDST: INCLUDE ANWMIDST.DSC
DRYSDRUM: INCLUDE DRYSDRUM.DSC
ANWSYNCH: INCLUDE ANWSYNCH.DSC
;---------------------------------------------------------------
TRANSFEREND: DW $0000,CODEAt offset 15BA00:
ITIAL:
CMP $2140
BNE BOOT_INITIAL
A8BIT
LDA #$CC
BRA BOOT_ENTRY1
BOOT_REPEAT:
LDA [$FD],Y
INY
XBA
LDA #$00
BRA BOOT_ENTRY2
BOOT_LOOP:
XBA
LDA [$FD],Y
INY
XBA
BOOT_WAIT1: CMP $2140
BNE BOOT_WAIT1
INC
BOOT_ENTRY2:
A16BIT
STA $2140
A8BIT
DEX
BNE BOOT_LOOP
BOOT_WAIT2: CMP $2140
BNE BOOT_WAIT2
BOOT_ZERO: ADC #$03
BEQ BOOT_ZERO
BOOT_ENTRY1:
PHA
A16BIT
LDA [$FD],Y
INY
INY
TAX
LDA [$FD],Y
INY
INY
STA $2142
A8BIT
CPX #$0001
LDA #$00
ROL
STA $2141
ADC #$7F
PLA
STA $2140
BOOT_WAIT3: CMP $2140
BNE BOOT_WAIT3
BVS BOOT_REPEAT
PLP
PHP
A8BIT
; LDA #$FE
;WAITFORSPCINIT:
; CMP $2140
; BNE WAITFORSPCINIT
LDA #$01
STA STEREOVAL
LDA #$80
STA PANVAL
LDA #$00
STA SFXNR
STA SFXCNTR
LDA #$0B
STA SFXMAX
PLP
RTS
STARTVBLOOP:
JSR XFERSOUND
JSR DOWNLOADSOUND
VBLOOP:
JSR WRITECHAR
JSR INCCOLORS
JSR HANDLEJOY
JSR UPDATESFX
A16BIT
LDA ACTPAL
INC
INC
INC
CMP #$0200
BMI
if ~def(maingrp)
inform 2,"This module cannot be assembled sepperately!"
elseif
pushs
section volcanomusicsec,code6
@startsongvolandsteps equ $5400
@sfxconst_dorquehit equ 0
@sfxconst_impspit equ 1
@sfxconst_lildevilhit equ 3
@sfxconst_pickupthing equ 4
@sfxconst_thinglanded equ 5
@sfxconst_explosionblast equ 6
@sfxconst_devilshoot equ 4
@sfxconst_lildevil equ 4
@sfxconst_fireball equ 2
@sfxconst_rockfall equ 8
@sfxconst_openchest equ 7
@sfxconst_devilhit equ 3
@sfxvol_impspit equ 110
@sfxvol_dorquehit equ 128
@sfxvol_lildevilhit equ 128
@sfxvol_pickupthing equ 128
@sfxvol_thinglanded equ 128
@sfxvol_explosionblast equ 255
@sfxvol_devilshoot equ 128
@sfxvol_lildevil equ 128
@sfxvol_fireball equ 128
@sfxvol_rockfall equ 190
@sfxvol_openchest equ 192
@sfxvol_devilhit equ 128
@sfx_impspit rb 1
@sfx_dorquehit rb 1
@sfx_lildevilhit rb 1
@sfx_pickupthing rb 1
@sfx_thinglanded rb 1
@sfx_explosionblast rb 1
@sfx_devilshoot rb 1
@sfx_lildevil rb 1
@sfx_fireball rb 1
@sfx_rockfall rb 1
@sfx_openchest rb 1
@sfx_devilhit rb 1
@sfxpan_impspit rw 1
@sfxpan_dorquehit rw 1
@sfxpan_lildevilhit rw 1
@sfxpan_pickupthing rw 1
@sfxpan_thinglanded rw 1
@sfxpan_explosionblast rw 1
@sfxpan_devilshoot rw 1
@sfxpan_lildevil rw 1
@sfxpan_fireball rw 1
@sfxpan_rockfall rw 1
@sfxpan_openchest rw 1
@sfxpan_devilhit rw 1
@clearsamples: proc far,mx:2
stz @sfx_impspit
stz @sfx_dorquehit
stz @sfx_lildevilhit
stz @sfx_pickupthing
stz @sfx_thinglanded
stz @sfx_explosionblast
stz @sfx_devilshoot
stz @sfx_lildevil
stz @sfx_fireball
stz @sfx_rockfall
stz @sfx_openchest
stz @sfx_devilhit
rtl
endp
@playsamples: proc far,mx:2
if ~(musicon=0)
lda usesound
bne @playsound
rtl
@playsound:
xy8bit
ldy #2
ldx #0
lda @sfx_explosionblast
beq @playsw2
senddummy
a16bit
lda @sfxpan_explosionblast
bpl @playswpan1
lda #0
bra @playswpan2
@playswpan1: cmp #$100
bmi @playswpan2
lda #$ff
@playswpan2: a8bit
sta $2143
lda #@sfxvol_explosionblast
sta $2142
txa
ora #@sfxconst_explosionblast*2
sta $2141
sendplaysmp
inx
dey
bne @playsw2
brl @playswend
@playsw2:
lda @sfx_rockfall
beq @playsw15
senddummy
a16bit
lda @sfxpan_rockfall
bpl @playswpan27
lda #0
bra @playswpan28
@playswpan27: cmp #$100
bmi @playswpan28
lda #$ff
@playswpan28: a8bit
sta $2143
lda #@sfxvol_rockfall
sta $2142
txa
ora #@sfxconst_rockfall*2
sta $2141
sendplaysmp
inx
dey
bne @playsw15
brl @playswend
@playsw15:
lda @sfx_dorquehit
beq @playsw3
senddummy
a16bit
lda @sfxpan_dorquehit
bpl @playswpan3
lda #0
bra @playswpan4
@playswpan3: cmp #$100
bmi @playswpan4
lda #$ff
@playswpan4: a8bit
sta $2143
lda #@sfxvol_dorquehit
sta $2142
txa
ora #@sfxconst_dorquehit*2
sta $2141
sendplaysmp
inx
dey
bne @playsw3
brl @playswend
@playsw3:
lda @sfx_openchest
beq @playsw16
senddummy
a16bit
lda @sfxpan_openchest
bpl @playswpan29
lda #0
bra @playswpan30
@playswpan29: cmp #$100
bmi @playswpan30
lda #$ff
@playswpan30: a8bit
sta $2143
lda #@sfxvol_openchest
sta $2142
txa
ora #@sfxconst_openchest*2
sta $2141
sendplaysmp
inx
dey
bne @playsw16
brl @playswend
@playsw16:
lda @sfx_lildevilhit
beq @playsw4
senddummy
a16bit
lda @sfxpan_lildevilhit
bpl @playswpan5
lda #0
bra @playswpan6
@playswpan5: cmp #$100
bmi @playswpan6
lda #$ff
@playswpan6: a8bit
sta $2143
lda #@sfxvol_lildevilhit
sta $2142
txa
ora #@sfxconst_lildevilhit*2
sta $2141
sendplaysmp
inx
dey
bne @playsw4
brl @playswend
@playsw4:
lda @sfx_devilhit
beq @playsw17
senddummy
a16bit
lda @sfxpan_devilhit
bpl @playswpan31
lda #0
bra @playswpan32
@playswpan31: cmp #$100
bmi @playswpan32
lda #$ff
@playswpan32: a8bit
sta $2143
lda #@sfxvol_devilhit
sta $2142
txa
ora #@sfxconst_devilhit*2
sta $2141
sendplaysmp
inx
dey
bne @playsw17
brl @playswend
@playsw17:
lda @sfx_impspit
beq @playsw5
senddummy
a16bit
lda @sfxpan_impspit
bpl @playswpan9
lda #0
bra @playswpan10
@playswpan9: cmp #$100
bmi @playswpan10
lda #$ff
@playswpan10: a8bit
sta $2143
lda #@sfxvol_impspit
sta $2142
txa
ora #@sfxconst_impspit*2
sta $2141
sendplaysmp
inx
dey
bne @playsw5
brl @playswend
@playsw5:
lda @sfx_pickupthing
beq @playsw7
senddummy
a16bit
lda @sfxpan_pickupthing
bpl @playswpan13
lda #0
bra @playswpan14
@playswpan13: cmp #$100
bmi @playswpan14
lda #$ff
@playswpan14: a8bit
sta $2143
lda #@sfxvol_pickupthing
sta $2142
txa
ora #@sfxconst_pickupthing*2
sta $2141
sendplaysmp
inx
dey
bne @playsw7
brl @playswend
@playsw7:
lda @sfx_thinglanded
beq @playsw8
senddummy
a16bit
lda @sfxpan_thinglanded
bpl @playswpan15
lda #0
bra @playswpan16
@playswpan15: cmp #$100
bmi @playswpan16
lda #$ff
@playswpan16: a8bit
sta $2143
lda #@sfxvol_thinglanded
sta $2142
txa
ora #@sfxconst_thinglanded*2
sta $2141
sendplaysmp
inx
dey
bne @playsw8
brl @playswend
@playsw8:
lda @sfx_devilshoot
beq @playsw12
senddummy
a16bit
lda @sfxpan_devilshoot
bpl @playswpan21
lda #0
bra @playswpan22
@playswpan21: cmp #$100
bmi @playswpan22
lda #$ff
@playswpan22: a8bit
sta $2143
lda #@sfxvol_devilshoot
sta $2142
txa
ora #@sfxconst_devilshoot*2
sta $2141
sendplaysmp
inx
dey
bne @playsw12
brl @playswend
@playsw12:
lda @sfx_fireball
beq @playsw14
senddummy
a16bit
lda @sfxpan_fireball
bpl @playswpan25
lda #0
bra @playswpan26
@playswpan25: cmp #$100
bmi @playswpan26
lda #$ff
@playswpan26: a8bit
sta $2143
lda #@sfxvol_fireball
sta $2142
txa
ora #@sfxconst_fireball*2
sta $2141
sendplaysmp
inx
dey
bne @playsw14
brl @playswend
@playsw14:
lda @sfx_lildevil
beq @playsw13
senddummy
a16bit
lda @sfxpan_lildevil
bpl @playswpan23
lda #0
bra @playswpan24
@playswpan23: cmp #$100
bmi @playswpan24
lda #$ff
@playswpan24: a8bit
sta $2143
lda #@sfxvol_lildevil
sta $2142
txa
ora #@sfxconst_lildevil*2
sta $2141
sendplaysmp
inx
dey
bne @playsw13
brl @playswend
@playsw13:
@playswend: xy16bit
senddummy
lda #$00
sta $2140
call @clearsamples
endif
rtl
endp
@startsonga: proc far,mx:0
if ~(musicon=0)
a8bit
lda usemusic
bne @playmusica
a16bit
rtl
@playmusica: a16bit
lda #@startsongvolandsteps
sta $2142
lda #$0009
sta $2140
a8bit
@startsonga1: cmp $2140
bne @startsonga1
lda #0
sta $2140
a16bit
endif
rtl
endp
pops
endifAt offset 15F000:
; This file was generated by MakeMuza.
; It contains necessary information to be included into
; a snes program and then downloaded into the SPC700.
; Header
db $00 ; Song id number
db $01 ; Number of instruments
db $00 ; Number of sfxs
DB $FF ; MASTERVOL
DB $01 ; (MONO)/STEREO
DB $A0 ; DEFAULT SFXVOL
DB $FF ; DEFAULT SONGVOL
; Instrument 0 - ANWMIDST.DSC
DB $40 ; DEFAULT CHANVOL
DB $40 ; DEFAULT CHANPAN
DB $00 ; BASEOCT
DB $8F ; ADSR1
DB $E0 ; ADSR2
DB $00 ; GAIN
DB $00 ; PITCH FACTOR
DW $0000 ; AFTERTOUCH FACTOR
db $00 ; Waveform id number
DW $08FB ; BASEFREQ
CTS ------------
; --------- IT MUST BE DEFINED IN ORDER