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MGPL-116
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AMIGADSP.S
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Text File
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1995-09-17
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51KB
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1,955 lines
***********************************************************************
*********** ***********
*********** ***********
*********** Amiga DSP-Replay ***********
*********** with P56 Loader ***********
*********** ***********
*********** Runs with 4/6/8 Voices & xxCH .MOD ***********
*********** ***********
*********** ***********
*********** By Simplet / FATAL DESIGN ***********
*********** ***********
***********************************************************************
Section TEXT
CPU_Time equ 0 ; Display CPU-Time taken by the Replay
DSP_Buffer equ 2048 ; DSP Sample Buffer Size for 49.17 KHz
XDef MGTK_Init_Module_Samples,MGTK_Set_Replay_Frequency
XDef MGTK_Init_DSP,MGTK_P56_Loader
XDef MGTK_Save_Sound,MGTK_Init_Sound,MGTK_Restore_Sound
XDef MGTK_Play_Music,MGTK_Pause_Music,MGTK_Stop_Music
XDef MGTK_Play_Position,MGTK_Previous_Position
XDef MGTK_Next_Position,MGTK_Clear_Voices
XDef MGTK_Play_FX_Module,MGTK_Play_FX_Sample
XDef MGTK_FX_Voices,MGTK_Voices
XDef MGTK_Master_Volume_Left,MGTK_Master_Volume_Right
XDef MGTK_Restart_Loop,MGTK_Restart_Done
XDef MGTK_Replay_In_Service
XDef MGTK_Replay_Satured,MGTK_Replay_Problem
***********************************************************************
*********** Macros ***********
***********************************************************************
WaitDSPToSend Macro
WaitDSPS\@ btst.b #1,$ffffa202.w ; Attend que le DSP
beq.s WaitDSPS\@ ; puisse recevoir
EndM
WaitDSPToGet Macro
WaitDSPG\@ btst.b #0,$ffffa202.w ; Attend que le DSP
beq.s WaitDSPG\@ ; ait envoyé une donnée
EndM
SaveColor Macro
Ifne CPU_Time
move.l $ffff9800.w,-(sp)
EndC
EndM
RestoreColor Macro
Ifne CPU_Time
move.l (sp)+,$ffff9800.w
EndC
EndM
CPUTimeColor Macro
Ifne CPU_Time
move.l \1,$ffff9800.w
EndC
EndM
***********************************************************************
*********** Structures ***********
***********************************************************************
RsReset
Amiga_Name rs.b 22
Amiga_Length rs.w 1 * Taille codée en words
Amiga_Fine_Tune rs.b 1 * de 0 à 15 = 0 à 7 et -8 à -1
Amiga_Volume rs.b 1 * de 0 à 64
Amiga_Repeat_Start rs.w 1
Amiga_Repeat_Length rs.w 1
Amiga_Size rs.b 1 * 30 octets
RsReset
Voice_Next rs.l 1
Voice_Sample_Start rs.l 1
Voice_Sample_Offset rs.l 1
Voice_Sample_Position rs.l 1
Voice_Sample_Length rs.l 1
Voice_Sample_Loop_Length rs.l 1
Voice_Sample_Volume rs.w 1
Voice_Sample_Period rs.w 1
Voice_Sample_Fine_Tune rs.w 1
Voice_Start rs.l 1
Voice_Volume rs.w 1
Voice_Period rs.w 1
Voice_Wanted_Period rs.w 1
Voice_Note rs.w 1
Voice_Sample rs.b 1
Voice_Command rs.b 1
Voice_Parameters rs.b 1
Voice_Tone_Port_Direction rs.b 1
Voice_Tone_Port_Speed rs.b 1
Voice_Glissando_Control rs.b 1
Voice_Vibrato_Command rs.b 1
Voice_Vibrato_Position rs.b 1
Voice_Vibrato_Control rs.b 1
Voice_Tremolo_Command rs.b 1
Voice_Tremolo_Position rs.b 1
Voice_Tremolo_Control rs.b 1
Voice_Size rs.b 1
***********************************************************************
*********** ***********
*********** Routines de gestion de Base du Replay : ***********
*********** ***********
*********** Fixer Fréquence de Replay ***********
*********** Jouer/arrêter le module, Position ***********
*********** précédente/suivante, Saut à une Position ***********
*********** Et gestion de samples supplémentaires (FX) ***********
*********** ***********
***********************************************************************
; Fixer la fréquence de Replay
; En Entrée :
; d0.w = Valeur du diviseur d'Horloge
; 1 : 49170 Hz, 2 : 32780 Hz, 3 : 24585 Hz, 4 : 19668 Hz
; 5 : 16380 Hz, 7 : 12292 Hz, 9 : 9834 Hz, 11 : 8195 Hz
MGTK_Set_Replay_Frequency
move.w d0,MGTK_Frequency_Divider
move.l #25175000/256+1,d1
addq.w #1,d0
divu.w d0,d1
move.w d1,MGTK_Replay_Frequency
rts
; Jouer le module
MGTK_Play_Music
movem.l d3-d7/a2-a6,-(sp)
move.b #125,MGTK_Music_Tempo
move.b #6,MGTK_Music_Speed
move.b #6,MGTK_Music_Counter
bsr MGTK_Search_Values_for_Tempo
move.w #0,MGTK_Music_Position
move.w #-1,MGTK_Pattern_Position
sf MGTK_Pattern_Loop_Flag
clr.w MGTK_Pattern_Loop_Counter
clr.w MGTK_Pattern_Loop_Position
sf MGTK_Pattern_Break_Flag
clr.w MGTK_Pattern_Break_Position
sf MGTK_Position_Jump_Flag
clr.w MGTK_Position_Jump_Position
clr.b MGTK_Pattern_Delay_Time
bsr MGTKClearVoices
sf MGTK_Replay_In_Service
sf MGTK_Replay_Problem
clr.w MGTK_Replay_Satured
sf MGTK_Replay_Paused
sf MGTK_Replay_Stopped
movem.l (sp)+,d3-d7/a2-a6
bra MGTK_Init_IT
;
; Met la Musique en Pause
;
MGTK_Pause_Music
tst.b MGTK_Replay_Stopped(pc)
bne.s MGTK_Pause_Music_Ret
tst.b MGTK_Replay_Paused(pc)
seq MGTK_Replay_Paused
tst.b MGTK_Replay_Paused(pc)
bne MGTK_Stop_IT
bra MGTK_Init_IT
MGTK_Pause_Music_Ret
rts
;
; Stoppe la musique
;
MGTK_Stop_Music
sf MGTK_Replay_Paused
st MGTK_Replay_Stopped
bra MGTK_Stop_IT
; Sauter à une position particulière
; En Entrée :
; d0.w = Numéro de la position
MGTK_Play_Position
cmp.w MGTK_Music_Length(pc),d0
blo.s MGTK_Play_Position_Ok
moveq.l #0,d0
MGTK_Play_Position_Ok
move.w d0,MGTK_Position_Jump_Position
st MGTK_Position_Jump_Flag
rts
;
; Position précédente
;
MGTK_Previous_Position
move.w MGTK_Music_Position(pc),d0
beq.s MGTK_Previous_Position_Skip
subq.w #1,d0
MGTK_Previous_Position_Skip
move.w d0,MGTK_Position_Jump_Position
st MGTK_Position_Jump_Flag
rts
;
; Position suivante
;
MGTK_Next_Position
move.w MGTK_Music_Position(pc),d0
cmp.w MGTK_Music_Length,d0
beq.s MGTK_Next_Position_Skip
addq.w #1,d0
MGTK_Next_Position_Skip
move.w d0,MGTK_Position_Jump_Position
st MGTK_Position_Jump_Flag
rts
;
; Gestion des effets spéciaux
;
MGTK_Play_FX_Module
MGTK_Play_FX_Sample
rts
;
; Remet les voies à zéro
;
MGTK_Clear_Voices
movem.l d3-d4/d7/a5-a6,-(sp)
bsr.s MGTKClearVoices
movem.l (sp)+,d3-d4/d7/a5-a6
rts
MGTKClearVoices
lea.l MGTK_Panoramics(pc),a5
move.w #1234,d4
lea.l MGTK_Fx_Voices(pc),a6
moveq.l #(32+4)-1,d7
MGTK_Clear_A_Voice
move.l (a5)+,(a6)+
clr.l (a6)+
clr.l (a6)+
clr.l (a6)+
clr.l (a6)+
clr.l (a6)+
clr.w (a6)+
move.w d4,(a6)+
clr.w (a6)+
clr.l (a6)+
clr.w (a6)+
move.w d4,(a6)+
clr.w (a6)+
clr.l (a6)+
clr.l (a6)+
clr.l (a6)+
clr.w (a6)+
dbra d7,MGTK_Clear_A_Voice
rts
***********************************************************************
*********** Initialisations du Module et des Samples ***********
***********************************************************************
; En Entrée :
; a0 = Adresse du Module
; a1 = Adresse de la fin de la zone de Travail (WorkSpace)
;
; En Sortie :
; d0 = 0 si tout c'est bien passé
; -3 si pas assez de place pour préparer des Samples
MGTK_Init_Module_Samples
movem.l d3-d7/a2-a6,-(sp)
sf MGTK_Replay_Paused
st MGTK_Replay_Stopped
move.w #$ffff,MGTK_Master_Volume_Left
move.w #$ffff,MGTK_Master_Volume_Right
move.l a0,MGTK_Module_Adr
move.l a1,MGTK_WorkSpace_Adr
lea.l 20+31*30+2(a0),a5 ; Par défaut
lea.l 4+128(a5),a6 ; Type
moveq.l #31,d0 ; 31 instruments
moveq.l #64,d2 ; 64 lignes par pattern
sf MGTK_Old_Module
move.l $438(a0),d3 ; ModFile Chunk
; Formats 4 voies
moveq.l #4,d1
cmp.l #'M.K.',d3
beq MGTK_Format_Ok
cmp.l #'M!K!',d3
beq MGTK_Format_Ok
cmp.l #'M&K&',d3
beq MGTK_Format_Ok
cmp.l #'FA04',d3
beq.s MGTK_Format_Digital
cmp.l #'FLT4',d3
beq.s MGTK_Format_Ok
cmp.l #'RASP',d3
beq.s MGTK_Format_Ok
; Formats 6 voies
moveq.l #6,d1
cmp.l #'FA06',d3
beq.s MGTK_Format_Digital
cmp.l #'6CHN',d3
beq.s MGTK_Format_Ok
; Formats 8 voies
moveq.l #8,d1
cmp.l #'FA08',d3
beq.s MGTK_Format_Digital
cmp.l #'8CHN',d3
beq.s MGTK_Format_Ok
cmp.l #'CD81',d3
beq.s MGTK_Format_Ok
cmp.l #'FLT8',d3
beq.s MGTK_Format_Ok
cmp.l #'OCTA',d3
beq.s MGTK_Format_Ok
; Formats xxCH xx voies
cmp.w #'CH',d3
bne.s MGTK_Format_Old
sub.l #'00'*65536,d3
rol.l #8,d3
move.b d3,d1
ext.w d1
mulu.w #10,d1
rol.l #8,d3
add.b d3,d1
bra.s MGTK_Format_Ok
; Si rien de spécial alors c'est un ancien module 15 instruments
MGTK_Format_Old
lea.l 20+15*30+2(a0),a5
lea.l 128(a5),a6
moveq.l #15,d0
moveq.l #4,d1
st MGTK_Old_Module
bra.s MGTK_Format_Ok
MGTK_Format_Digital
move.w (a6)+,d2
addq.l #2,a6
MGTK_Format_Ok
move.l a5,MGTK_Sequence_Adr ; Adresse de la séquence
move.l a6,MGTK_Patterns_Adr ; Adresse des patterns
move.w d0,MGTK_Nb_Samples ; Nombre d'instruments
move.w d1,MGTK_Nb_Voices ; Nombre de voies
move.w d2,MGTK_Pattern_Length
lsl.w #2,d1
move.w d1,MGTK_Line_Size ; Taille d'une 'ligne'
mulu.w d2,d1
move.w d1,MGTK_Pattern_Size ; Taille d'un pattern
move.b -2(a5),d0
move.w d0,MGTK_Music_Length ; Longueur du module
move.b -1(a5),d2
cmp.b d0,d2 ; le Restart
blo.s MGTK_Restart_Ok ; est-il cohérent ?
moveq.l #0,d2 ; si non, Restart = 0
MGTK_Restart_Ok
move.w d2,MGTK_Music_Restart
moveq.l #128-1,d0 ; Parcours la séquence
moveq.l #0,d1 ; jusqu'à la dernière
MGTK_Sequence_Loop ; position
move.b (a5)+,d2 ; No Pattern
cmp.b d1,d2 ; Plus grand
blo.s MGTK_Seq_No_Max ; que le maximum ?
move.b d2,d1 ; alors Nouveau maximum
MGTK_Seq_No_Max
dbra d0,MGTK_Sequence_Loop
addq.w #1,d1 ; Nombre de patterns
mulu.w MGTK_Pattern_Size(pc),d1 ; Taille totale
movea.l MGTK_Patterns_Adr(pc),a1 ; Adresse du début
lea.l (a1,d1.l),a1 ; Des samples
lea.l 20(a0),a2 ; Pointe sur Infos Samples
moveq.l #0,d1
move.w MGTK_Nb_Samples(pc),d7
subq.w #1,d7
MGTK_Total_Length
moveq.l #0,d3 ; Longueur
move.w Amiga_Length(a2),d3 ; du sample
add.l d3,d3 ; * 2 car stocké en words
add.l d3,d1 ; Ajoute au total
lea.l Amiga_Size(a2),a2 ; Instrument suivant
dbra d7,MGTK_Total_Length ; Calcule longueur totale
; Recopie les samples à la fin de la zone de travail temporaire
; pour justement pouvoir travailler dessus, les préparer au bouclage
movea.l MGTK_WorkSpace_Adr(pc),a4
lea.l (a1,d1.l),a3 ; Adresse fin des samples
MGTK_Move_Samples
move.w -(a3),-(a4)
subq.l #2,d1
bne.s MGTK_Move_Samples
; Maintenant, on bosse sur les samples
lea.l 20(a0),a0 ; Pointe sur 1er Sample
lea.l MGTK_Samples_Adr(pc),a2 ; Adresse des samples
move.w MGTK_Nb_Samples(pc),d7
subq.w #1,d7
MGTK_Init_Samples
clr.l (a2)+ ; Adresse Nulle par défaut
move.w Amiga_Length(a0),d3 ; Longueur Nulle ?
beq.s MGTK_Init_Next_Sample ; Alors pas d'instrument
move.l a1,-4(a2) ; Sinon Note Adresse
move.w Amiga_Repeat_Length(a0),d5 ; Longueur de Boucle
cmp.w #1,d5 ; supérieure à 1 ?
bhi.s MGTK_Repeat_Length ; Alors il y a bouclage
MGTK_No_Repeat_Length
subq.w #1,d3
MGTK_Copy_Sample_Loop
move.w (a4)+,(a1)+ ; Recopie simplement
dbra d3,MGTK_Copy_Sample_Loop ; le sample
move.w #672/4-1,d0
MGTK_Clear_End_Sample_Loop ; et met du vide après
clr.l (a1)+ ; car ne boucle pas
dbra d0,MGTK_Clear_End_Sample_Loop
clr.w Amiga_Repeat_Start(a0)
clr.w Amiga_Repeat_Length(a0)
bra.s MGTK_Init_Next_Sample
MGTK_Repeat_Length
move.w Amiga_Repeat_Start(a0),d4 ; Début de boucle ?
beq.s MGTK_No_Repeat_Start ; Si Non, Jump
move.w d4,d0
subq.w #1,d0
MGTK_Copy_Sample_Start
move.w (a4)+,(a1)+ ; Recopie la partie
dbra d0,MGTK_Copy_Sample_Start ; avant la boucle
MGTK_No_Repeat_Start
movea.l a1,a3 ; Note début de Boucle
move.w d5,d0 ; Longueur de la Boucle
subq.w #1,d0
MGTK_Copy_First_Loop
move.w (a4)+,(a1)+ ; Recopie la boucle
dbra d0,MGTK_Copy_First_Loop ; une première fois
move.w #672/2-1,d0
MGTK_Make_Loop_Buffer
move.w (a3)+,(a1)+ ; Fait le buffer
dbra d0,MGTK_Make_Loop_Buffer ; de bouclage
sub.w d5,d3
sub.w d4,d3 ; Saute la partie après
lea.l (a4,d3.w*2),a4 ; la boucle qui ne sert à rien
add.w d5,d4
move.w d4,Amiga_Length(a0)
move.w d5,Amiga_Repeat_Length(a0)
MGTK_Init_Next_Sample
cmpa.l a4,a1
bhi.s MGTK_Init_Samples_Error
lea.l Amiga_Size(a0),a0
dbra d7,MGTK_Init_Samples
move.l a1,MGTK_Module_End_Adr
bsr MGTKClearVoices
movem.l (sp)+,d3-d7/a2-a6
moveq.l #0,d0
rts
MGTK_Init_Samples_Error
movem.l (sp)+,d3-d7/a2-a6
moveq.l #-3,d0
rts
***********************************************************************
*********** Initialisation DSP ***********
***********************************************************************
; Charge le Programme DSP et vérifie son fonctionnement
; En Sortie:
; d0 = 0 si tout c'est bien passé
; -1 si le programme DSP n'a pu être chargé
MGTK_Init_DSP
pea.l (a2)
pea.l MGTKInitDSP(pc)
move.w #38,-(sp) ; Supexec
trap #14 ; XBios
addq.l #6,sp
movea.l (sp)+,a2
move.l MGTK_DSP_Ok(pc),d0
rts
MGTKInitDSP
move.w #113,-(sp) ; DSP_RequestUniqueAbility
trap #14 ; XBios
addq.l #2,sp
move.w d0,-(sp) ; No Ability
pea.l MGTK_DSP_Replay_Size.w ; Longueur en Mots DSP
pea.l MGTK_DSP_Replay_Code(pc) ; Adresse du code binaire
move.w #109,-(sp) ; Dsp_ExecProg
trap #14 ; XBios
lea.l 12(sp),sp
MGTK_Connect
move.l #87654321,$ffffa204.w
moveq.l #0,d0
MGTK_Connect_Get
btst.b #0,$ffffa202.w
bne.s MGTK_DSP_Test
addq.l #1,d0
cmp.l #100000,d0
beq.s MGTK_DSP_Error
bra.s MGTK_Connect_Get
MGTK_DSP_Test
move.l $ffffa204.w,d0
cmp.l #12345678,d0
move.l #0,MGTK_DSP_Ok
rts
MGTK_DSP_Error
move.l #-1,MGTK_DSP_Ok
rts
MGTK_DSP_Ok
ds.l 1
***********************************************************************
*********** Loader de P56 ***********
*********** A appeler en mode superviseur ! ***********
***********************************************************************
; Permet de lancer un nouveau programme DSP en plus du SoundTrack
; En Entrée :
; a0 pointe sur le programme DSP au format binaire
; d0 contient la taille du programme en words DSP
;
MGTK_P56_Loader
lea.l $ffffa204.w,a1
move.b #$80+$12,-3(a1) ; Host User Command, adresse $24
MGTK_P56_Loader_Wait1
tst.b -3(a1)
bmi.s MGTK_P56_Loader_Wait1
MGTK_P56_Loader_Wait2
WaitDSPToGet
move.l (a1),d1
and.l #$00ffffff,d1
cmp.l #'P56',d1
bne.s MGTK_P56_Loader_Wait2
subq.w #1,d0
MGTK_P56_Loader_Loop
moveq.l #0,d1
move.b (a0)+,d1
swap.w d1
move.w (a0)+,d1
WaitDSPToSend
move.l d1,(a1)
dbra d0,MGTK_P56_Loader_Loop
WaitDSPToSend
move.l #-1,(a1)
rts
***********************************************************************
*********** Initialisations Système Sonore ***********
***********************************************************************
MGTK_Init_Sound
pea.l (a2)
pea.l MGTKInitSound(pc)
move.w #38,-(sp) ; Supexec
trap #14 ; XBios
addq.l #6,sp
movea.l (sp)+,a2
rts
MGTKInitSound
* Stoppe la lecture DMA au cas où...
clr.b $ffff8901.w
* DAC sur piste 0 (quartet fort)
move.b #$0f,$ffff8920.w
* Source External Input sur Horloge Interne 25.175 MHz, Handshaking Off
* Source ADC Input sur Horloge Interne 25.175 MHz, Handshaking Off
move.b #%00010001,$ffff8930.w
* Source DSP-Xmit sur Horloge Interne 25.175 MHz, DSP Tristated, Handshaking Off
* Source DMA-Play sur Horloge Interne 25.175 MHz
move.b #%00010001,$ffff8931.w
* Destination External Output connectée à Source DSP-Xmit, Handshaking Off
* Destination DAC Output connecté à DSP-Xmit, Handshaking Off
move.b #%00110011,$ffff8932.w
* Destination DMA Record connectée à Source DSP-Xmit, Handshaking Off
* Destination DSP-Rec connecté à DMA-Play, Handshaking Off, Tristated
move.b #%00010011,$ffff8933.w
* Seulement Matrice et pas le PSG-Yamaha
move.b #%10,$ffff8937.w
rts
MGTK_Save_Sound
pea.l (a2)
pea.l MGTKSaveSound(pc)
move.w #38,-(sp) ; Supexec
trap #14 ; XBios
addq.l #6,sp
movea.l (sp)+,a2
rts
MGTKSaveSound
lea.l MGTK_Old_Sound_System(pc),a0
move.w $ffff8900.w,(a0)+ ; Interruptions, Son DMA
bclr.b #7,$ffff8901.w ; Registres PlayBack
move.b $ffff8903.w,(a0)+ ; Start - High
move.b $ffff8905.w,(a0)+ ; Start - Med
move.b $ffff8907.w,(a0)+ ; Start - Low
move.b $ffff890f.w,(a0)+ ; End - High
move.b $ffff8911.w,(a0)+ ; End - Med
move.b $ffff8913.w,(a0)+ ; End - Low
bset.b #7,$ffff8901.w ; Registres Record
move.b $ffff8903.w,(a0)+ ; Start - High
move.b $ffff8905.w,(a0)+ ; Start - Med
move.b $ffff8907.w,(a0)+ ; Start - Low
move.b $ffff890f.w,(a0)+ ; End - High
move.b $ffff8911.w,(a0)+ ; End - Med
move.b $ffff8913.w,(a0)+ ; End - Low
move.w $ffff8920.w,(a0)+ ; Nb Voies, 8/16, Mono/Stereo
move.w $ffff8930.w,(a0)+ ; Matrice : Sources
move.w $ffff8932.w,(a0)+ ; Matrice : Destinations
move.w $ffff8934.w,(a0)+ ; Prescales d'horloge
move.w $ffff8936.w,(a0)+ ; Nb Voies Record,source ADDERIN
move.w $ffff8938.w,(a0)+ ; Source ADC + Volumes entrées
move.w $ffff893a.w,(a0)+ ; Volumes de Sortie
rts
MGTK_Restore_Sound
pea.l (a2)
pea.l MGTKRestoreSound(pc)
move.w #38,-(sp) ; Supexec
trap #14 ; XBios
addq.l #6,sp
movea.l (sp)+,a2
rts
MGTKRestoreSound
lea.l MGTK_Old_Sound_System(pc),a0
move.w (a0)+,d0
bclr.b #7,$ffff8901.w ; Registres PlayBack
move.b (a0)+,$ffff8903.w ; Start - High
move.b (a0)+,$ffff8905.w ; Start - Med
move.b (a0)+,$ffff8907.w ; Start - Low
move.b (a0)+,$ffff890f.w ; End - High
move.b (a0)+,$ffff8911.w ; End - Med
move.b (a0)+,$ffff8913.w ; End - Low
bset.b #7,$ffff8901.w ; Registres Record
move.b (a0)+,$ffff8903.w ; Start - High
move.b (a0)+,$ffff8905.w ; Start - Med
move.b (a0)+,$ffff8907.w ; Start - Low
move.b (a0)+,$ffff890f.w ; End - High
move.b (a0)+,$ffff8911.w ; End - Med
move.b (a0)+,$ffff8913.w ; End - Low
move.w d0,$ffff8900.w ; Interruptions, Son DMA
move.w (a0)+,$ffff8920.w ; Nb Voies, 8/16, Mono/Stereo
move.w (a0)+,$ffff8930.w ; Matrice : Sources
move.w (a0)+,$ffff8932.w ; Matrice : Destinations
move.w (a0)+,$ffff8934.w ; Prescales d'horloge
move.w (a0)+,$ffff8936.w ; Nb Voies Record,source ADDERIN
move.w (a0)+,$ffff8938.w ; Source ADC + Volumes entrées
move.w (a0)+,$ffff893a.w ; Volumes de Sortie
move.b #$80+$14,$ffffa201.w ; Efface Buffer Sample DSP
rts
***********************************************************************
*********** Sauvegardes système sonore ***********
***********************************************************************
MGTK_Old_Sound_System
ds.w 1 ; Interruptions, Son DMA
ds.b 3 ; Playback Start
ds.b 3 ; Playback End
ds.b 3 ; Record Start
ds.b 3 ; Record End
ds.w 1 ; Nb Voies, 8/16, Mono/Stereo
ds.w 1 ; Matrice : Sources
ds.w 1 ; Matrice : Destinations
ds.w 1 ; Prescales d'horloge
ds.w 1 ; Nb Voies Record,source ADDERIN
ds.w 1 ; Source ADC + Volumes entrées
ds.w 1 ; Volumes de Sortie
***********************************************************************
*********** Controle des Interruptions ***********
***********************************************************************
; Installe l'interruption Timer A du Player
; Connecte le DSP à la matrice sonore
MGTK_Init_IT
pea.l (a2)
pea.l MGTK_Replay_Timer(pc) ; Adresse Vecteur
moveq.l #0,d0
move.b MGTK_IT_Timer_Data(pc),d0
move.w d0,-(sp)
move.b MGTK_IT_Timer_Control(pc),d0
move.w d0,-(sp)
clr.w -(sp) ; Timer No 0
move.w #31,-(sp) ; Xbtimer
trap #14 ; XBios
lea.l 12(sp),sp
pea.l MGTKDSPSoundOn(pc)
move.w #38,-(sp) ; Supexec
trap #14 ; XBios
addq.l #6,sp
movea.l (sp)+,a2
rts
MGTKDSPSoundOn
bset.b #7,$ffff8931.w ; DSP Enabled
rts
; Enlève l'interruption Timer A du Player
; Déconnecte le DSP de la matrice sonore
MGTK_Stop_IT
pea.l (a2)
clr.l -(sp)
clr.l -(sp) ; Stoppe le
clr.w -(sp) ; Timer A
move.w #31,-(sp) ; Xbtimer
trap #14 ; XBios
lea.l 12(sp),sp
pea.l MGTKDSPSoundOff(pc)
move.w #38,-(sp) ; Supexec
trap #14 ; XBios
addq.l #6,sp
movea.l (sp)+,a2
rts
MGTKDSPSoundOff
bclr.b #7,$ffff8931.w ; DSP Tristated
rts
***********************************************************************
*********** Interruptions du Replay Soundtracker ***********
***********************************************************************
MGTK_Replay_Timer
move.w #$2700,sr
move.b MGTK_IT_Timer_Data(pc),$fffffa1f.w
move.b MGTK_IT_Timer_Control(pc),$fffffa19.w
MGTK_Replay_IT
tst.b MGTK_Replay_In_Service(pc)
beq.s MGTK_Replay_Not_Satured
addq.w #1,MGTK_Replay_Satured
bclr.b #5,$fffffa0f.w ; à Cause du mode SEI
rte
MGTK_Replay_Not_Satured
; Signale au DSP qu'on veut causer à la routine Soundtracker
move.b #$80+$13,$ffffa201.w ; Host User 0, adresse $26
SaveColor
CPUTimeColor #$dd550088
movem.l d0/a6,-(sp)
lea.l $ffffa204.w,a6 ; Port Host
; DSP es-tu là ?
move.l (a6),d0
cmp.l #'MGT',d0
beq.s MGTK_Replay_No_Problem
st MGTK_Replay_Problem
bra.s MGTK_Replay_Ret
MGTK_Replay_No_Problem
st MGTK_Replay_In_Service
; Envoie Master Volumes
clr.w (a6)
move.w MGTK_Master_Volume_Left(pc),2(a6)
move.w MGTK_Master_Volume_Right(pc),2(a6)
; Envoie le Nombre de Voies pour le mixage (sans les 4 voies FX)
move.w MGTK_Nb_Voices(pc),2(a6)
; Prépare le pointeur sur les voies
move.l #MGTK_FX_Voices,MGTK_Voices_Ptr
; Autorise interruption de réception en provenance du DSP
move.l #MGTK_Replay_Voices,$3fc.w
move.b #$ff,-1(a6) ; $ffffa203.w
bset.b #0,-4(a6) ; $ffffa200.w
MGTK_Replay_Ret
movem.l (sp)+,d0/a6
RestoreColor
bclr.b #5,$fffffa0f.w ; à Cause du mode SEI
rte
;
; Mixage des Pistes une par une
;
MGTK_Replay_Voices
SaveColor
CPUTimeColor #0
movem.l d0-d3/a0/a5/a6,-(sp)
lea.l $ffffa204.w,a6
bclr.b #0,-4(a6) ; Inhibe Interruption Recéption
MGTK_Replay_Get
move.w 2(a6),d0 ; Flag Nouvelle voie
beq MGTK_Replay_No_More_Voices
movea.l MGTK_Voices_Ptr(pc),a5 ; Pointe sur la voie courante
move.l Voice_Next(a5),d0
add.l d0,MGTK_Voices_Ptr
; Envoie les infos sur la voie
; d'abord la voie est-elle active ?
tst.l Voice_Sample_Start(a5)
bne.s MGTK_Replay_Sample_Ok
MGTK_Replay_No_Voice
clr.l (a6)
WaitDSPToGet
bra.s MGTK_Replay_Get
MGTK_Replay_Sample_Ok
moveq.l #0,d0
move.w Voice_Sample_Volume(a5),d0
beq.s MGTK_Replay_No_Voice
; Envoie Volume
move.l d0,(a6)
; Envoie fréquence relative
move.l #428*8363/256/2,d1
moveq.l #0,d0 ; d1:d0=$800000*(428*8363)
move.w MGTK_Replay_Frequency(pc),d2
mulu.w Voice_Sample_Period(a5),d2
divu.l d2,d1:d0
lsr.l d0
move.l d0,(a6)
; Explication du calcul :
; Fréquence de replay d'une note =
; Base du DO-2 * Periode du DO-2 / Periode de la Note
; Nous on veut le rapport avec la fréquence de Replay donc / Freq_Replay
; et résultat à virgule prémultiplié par $800000 pour le DSP
; Recoie longueur du sample jouée dans cette frame
WaitDSPToGet
move.l (a6),d0
movea.l Voice_Sample_Start(a5),a0 ; Adresse Sample
move.l Voice_Sample_Position(a5),d1 ; Position
move.l d1,d2 ; Courante
add.l d0,d2 ; Position d'arrivée
tst.l Voice_Sample_Loop_Length(a5)
bne.s MGTK_Replay_Loop
MGTK_Replay_No_Loop
cmp.l Voice_Sample_Length(a5),d2 ; A-t'on dépassé la fin
blt.s MGTK_Replay_Pos_Ok ; du Sample ?
clr.l Voice_Sample_Start(a5) ; Oui, alors sample
bra.s MGTK_Replay_Pos_Ok ; désactivé
MGTK_Replay_Loop
cmp.l Voice_Sample_Length(a5),d2 ; A-t'on dépassé la
blt.s MGTK_Replay_Pos_Ok ; fin de la boucle ?
sub.l Voice_Sample_Loop_Length(a5),d2 ; Si oui, reboucle
bra.s MGTK_Replay_Loop ; tant qu'il faut
MGTK_Replay_Pos_Ok
move.l d2,Voice_Sample_Position(a5) ; Nouvelle position
; Envoi du sample
lea.l (a0,d1.l),a0
lsr.w d0 ; Envoi par paquet de deux
CPUTimeColor #$dd550088
addq.l #2,a6 ; Port Host en word
MGTK_Send_Samples
move.w (a0)+,(a6)
MGTK_Send_Samples_Jump
dbra d0,MGTK_Send_Samples
; Autorise interruption de réception en provenance du DSP
bset.b #0,-6(a6) ; $ffffa200.w
movem.l (sp)+,d0-d3/a0/a5/a6
RestoreColor
rte
MGTK_Replay_No_More_Voices
move.b MGTK_Frequency_Divider+1(pc),$ffff8935.w
sf MGTK_Replay_In_Service
; S'occupe de la partition
move.w MGTK_IT_Counter(pc),d0
addq.w #1,d0
move.w d0,MGTK_IT_Counter
cmp.w MGTK_IT_Number(pc),d0
blo.s MGTK_Replay_Not_Patterns
CPUTimeColor #$99990099
clr.w MGTK_IT_Counter
movem.l d4-d7/a1-a4,-(sp)
bsr.s MGTK_Play_Patterns
movem.l (sp)+,d4-d7/a1-a4
MGTK_Replay_Not_Patterns
movem.l (sp)+,d0-d3/a0/a5/a6
RestoreColor
rte
MGTK_Voices_Ptr
ds.l 1
***********************************************************************
*********** Gestion du Soundtrack ***********
***********************************************************************
MGTK_Play_Patterns
addq.b #1,MGTK_Music_Counter
move.b MGTK_Music_Counter(pc),d0
cmp.b MGTK_Music_Speed(pc),d0
blo MGTK_No_New_Note
clr.b MGTK_Music_Counter
tst.b MGTK_Pattern_Break_Flag(pc)
bne.s MGTK_New_Pattern
tst.b MGTK_Pattern_Delay_Time(pc)
beq.s MGTK_No_Pattern_Delay
subq.b #1,MGTK_Pattern_Delay_Time
bra MGTK_No_New_Note
MGTK_No_Pattern_Delay
tst.b MGTK_Pattern_Loop_Flag(pc)
beq.s MGTK_No_Pattern_Loop
move.w MGTK_Pattern_Loop_Position(pc),MGTK_Pattern_Position
sf MGTK_Pattern_Loop_Flag
bra MGTK_New_Notes
MGTK_No_Pattern_Loop
tst.b MGTK_Position_Jump_Flag(pc)
beq.s MGTK_New_Line
move.w MGTK_Position_Jump_Position(pc),d0
sf MGTK_Position_Jump_Flag
clr.w MGTK_Pattern_Break_Position
bra.s MGTK_New_Position
MGTK_New_Line
addq.w #1,MGTK_Pattern_Position
move.w MGTK_Pattern_Position(pc),d0
cmp.w MGTK_Pattern_Length(pc),d0
blo.s MGTK_New_Notes
MGTK_New_Pattern
move.w MGTK_Music_Position(pc),d0
addq.w #1,d0
MGTK_New_Position
move.w MGTK_Pattern_Break_Position(pc),MGTK_Pattern_Position
clr.w MGTK_Pattern_Break_Position
sf MGTK_Pattern_Break_Flag
cmp.w MGTK_Music_Length(pc),d0
blo.s MGTK_No_Restart
move.w MGTK_Music_Restart(pc),d0
bne.s MGTK_No_Restart_Tempo
move.b #125,MGTK_Music_Tempo
move.b #6,MGTK_Music_Speed
bsr MGTK_Search_Values_for_Tempo
MGTK_No_Restart_Tempo
tst.b MGTK_Restart_Loop(pc)
bne.s MGTK_No_Restart
st MGTK_Restart_Done
sf MGTK_Replay_Paused
st MGTK_Replay_Stopped
clr.b $fffffa19.w ; Coupe Timer
bclr.b #5,$fffffa07.w ; Désautorise Timer
bclr.b #5,$fffffa13.w ; DéMaske Timer
bclr.b #7,$ffff8931.w ; DSP Tristated
MGTK_No_Restart
move.w d0,MGTK_Music_Position
MGTK_New_Notes
movea.l MGTK_Module_Adr(pc),a5
adda.w #20,a5 ; Pointe sur infos samples
movea.l MGTK_Sequence_Adr(pc),a0
move.w MGTK_Music_Position(pc),d1
moveq.l #0,d0
move.b (a0,d1.w),d0
mulu.w MGTK_Pattern_Size(pc),d0
movea.l MGTK_Patterns_Adr(pc),a4
adda.l d0,a4 ; Pointe sur le Pattern
move.w MGTK_Pattern_Position(pc),d0
mulu.w MGTK_Line_Size(pc),d0
adda.w d0,a4 ; Pointe sur la Bonne Ligne
lea.l MGTK_Voices(pc),a6
move.w MGTK_Nb_Voices(pc),d7
subq.w #1,d7
MGTK_New_Notes_Loop
bsr.s MGTK_Play_Voice
lea.l Voice_Size(a6),a6
dbra d7,MGTK_New_Notes_Loop
rts
MGTK_No_New_Note
lea.l MGTK_Voices(pc),a6
move.w MGTK_Nb_Voices(pc),d7
subq.w #1,d7
MGTK_No_New_Note_Loop
moveq.l #0,d0
move.b Voice_Command(a6),d0
jsr ([Jump_Table_2,d0.w*4])
lea.l Voice_Size(a6),a6
dbra d7,MGTK_No_New_Note_Loop
rts
MGTK_Play_Voice
move.w (a4)+,d1
move.b (a4)+,d2
move.b (a4)+,Voice_Parameters(a6)
move.w d1,d0
and.w #$0fff,d0
move.w d0,Voice_Note(a6)
and.w #$f000,d1
lsr.w #8,d1
move.b d2,d0
lsr.b #4,d0
add.b d1,d0
move.b d0,Voice_Sample(a6)
and.b #$0f,d2
move.b d2,Voice_Command(a6)
MGTK_Check_Sample
moveq.l #0,d2
move.b Voice_Sample(a6),d2
beq.s MGTK_No_New_Sample
subq.w #1,d2
lea.l MGTK_Samples_Adr(pc),a1
move.l (a1,d2.w*4),Voice_Start(a6)
clr.l Voice_Sample_Offset(a6)
mulu.w #Amiga_Size,d2
moveq.l #0,d0
move.w Amiga_Length(a5,d2.w),d0
lsl.l d0
move.l d0,Voice_Sample_Length(a6)
move.w Amiga_Repeat_Length(a5,d2.w),d0
lsl.l d0
move.l d0,Voice_Sample_Loop_Length(a6)
moveq.l #0,d0
move.b Amiga_Volume(a5,d2.w),d0
move.w d0,Voice_Volume(a6)
move.w d0,Voice_Sample_Volume(a6)
move.b Amiga_Fine_Tune(a5,d2.w),d0
and.w #$0f,d0
mulu.w #12*3*2,d0
move.w d0,Voice_Sample_Fine_Tune(a6)
MGTK_No_New_Sample
tst.w Voice_Note(a6)
beq MGTK_Check_Efx_1
MGTK_Check_Efx_0
move.w Voice_Command(a6),d0
and.w #$0ff0,d0
cmp.w #$0e50,d0
beq.s MGTK_Do_Set_Fine_Tune
move.b Voice_Command(a6),d0
subq.b #3,d0 ; 3 = Tone Portamento
beq MGTK_Set_Tone_Portamento
subq.b #2,d0 ; 5 = Tone Porta + Vol Slide
beq MGTK_Set_Tone_Portamento
subq.b #4,d0 ; 9 = Sample Offset
bne.s MGTK_Set_Period
bsr MGTK_Sample_Offset
bra.s MGTK_Set_Period
MGTK_Do_Set_Fine_Tune
bsr MGTK_Set_Fine_Tune
MGTK_Set_Period
lea.l MGTK_Period_Table(pc),a0
move.w Voice_Note(a6),d0
bsr MGTK_Find_Period
adda.w Voice_Sample_Fine_Tune(a6),a0
move.w (a0),Voice_Period(a6)
move.w Voice_Command(a6),d0
and.w #$0ff0,d0
cmp.w #$0ed0,d0
bne.s MGTK_No_Note_Delay
move.b Voice_Parameters(a6),d0
and.b #$0f,d0
beq.s MGTK_No_Note_Delay
rts
MGTK_No_Note_Delay
move.w Voice_Period(a6),Voice_Sample_Period(a6)
move.l Voice_Start(a6),Voice_Sample_Start(a6)
move.l Voice_Sample_Offset(a6),Voice_Sample_Position(a6)
btst.b #2,Voice_Vibrato_Control(a6)
bne.s MGTK_Vibrato_No_Reset
clr.b Voice_Vibrato_Position(a6)
MGTK_Vibrato_No_Reset
btst.b #2,Voice_Tremolo_Control(a6)
bne.s MGTK_Tremolo_No_Reset
clr.b Voice_Tremolo_Position(a6)
MGTK_Tremolo_No_Reset
MGTK_Check_Efx_1
moveq.l #0,d0
move.b Voice_Command(a6),d0
jmp ([Jump_Table_1,d0.w*4])
Jump_Table_1
dc.l MGTK_Period_Nop,MGTK_Period_Nop
dc.l MGTK_Period_Nop,MGTK_Period_Nop
dc.l MGTK_Period_Nop,MGTK_Period_Nop
dc.l MGTK_Period_Nop,MGTK_Period_Nop
dc.l MGTK_Period_Nop,MGTK_Period_Nop
dc.l MGTK_Period_Nop,MGTK_Position_Jump
dc.l MGTK_Volume_Change,MGTK_Pattern_Break
dc.l MGTK_E_Commands_1,MGTK_Set_Speed
MGTK_E_Commands_1
move.b Voice_Parameters(a6),d0
and.w #$f0,d0
lsr.w #4,d0
jmp ([Jump_Table_E1,d0.w*4])
Jump_Table_E1
dc.l MGTK_Return,MGTK_Fine_Portamento_Up
dc.l MGTK_Fine_Portamento_Down,MGTK_Set_Glissando_Control
dc.l MGTK_Set_Vibrato_Control,MGTK_Return
dc.l MGTK_Pattern_Loop,MGTK_Set_Tremolo_Control
dc.l MGTK_Return,MGTK_Retrig_Note
dc.l MGTK_Volume_Fine_Up,MGTK_Volume_Slide_Down
dc.l MGTK_Note_Cut,MGTK_Return
dc.l MGTK_Pattern_Delay,MGTK_Return
Jump_Table_2
dc.l MGTK_Arpeggio,MGTK_Portamento_Up
dc.l MGTK_Portamento_Down,MGTK_Tone_Portamento
dc.l Mt_Vibrato,MGTK_Tone_Portamento_Plus_Volume_Slide
dc.l MGTK_Vibrato_Plus_Volume_Slide,Mt_Tremolo
dc.l MGTK_Return,MGTK_Return
dc.l MGTK_Volume_Slide,MGTK_Return
dc.l MGTK_Return,MGTK_Return
dc.l MGTK_E_Commands_2,MGTK_Return
MGTK_E_Commands_2
move.b Voice_Parameters(a6),d0
and.w #$f0,d0
lsr.w #4,d0
jmp ([Jump_Table_E2,d0.w*4])
Jump_Table_E2
dc.l MGTK_Return,MGTK_Return
dc.l MGTK_Return,MGTK_Return
dc.l MGTK_Return,MGTK_Return
dc.l MGTK_Return,MGTK_Return
dc.l MGTK_Return,MGTK_Retrig_Note
dc.l MGTK_Return,MGTK_Return
dc.l MGTK_Note_Cut,MGTK_Note_Delay
dc.l MGTK_Return,MGTK_Return
MGTK_Find_Period
cmp.w 12*2(a0),d0
bhs.s MGTK_Do_Find_Period
lea.l 12*2(a0),a0
cmp.w 12*2(a0),d0
bhs.s MGTK_Do_Find_Period
lea.l 12*2(a0),a0
MGTK_Do_Find_Period
moveq.l #12-1,d3
MGTK_Find_Period_Loop
cmp.w (a0)+,d0
dbhs d3,MGTK_Find_Period_Loop
blo.s MGTK_Period_Found
subq.l #2,a0
MGTK_Period_Found
rts
MGTK_Period_Nop
move.w Voice_Period(a6),Voice_Sample_Period(a6)
MGTK_Return
rts
MGTK_Arpeggio_Table
dc.b 0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,0
dc.b 1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,1
MGTK_Arpeggio
move.b Voice_Parameters(a6),d1
beq.s MGTK_Period_Nop
moveq.l #0,d0
move.b MGTK_Music_Counter(pc),d0
move.b MGTK_Arpeggio_Table(pc,d0.w),d0
beq.s MGTK_Period_Nop
subq.b #2,d0
beq.s MGTK_Arpeggio_2
MGTK_Arpeggio_1
lsr.w #4,d1
MGTK_Arpeggio_2
and.w #$f,d1
lea.l MGTK_Period_Table(pc),a0
adda.w Voice_Sample_Fine_Tune(a6),a0
move.w Voice_Period(a6),d0
bsr.s MGTK_Find_Period
move.w (a0,d1.w*2),Voice_Sample_Period(a6)
rts
MGTK_Portamento_Up
moveq.l #0,d0
move.b Voice_Parameters(a6),d0
MGTK_Portamento_Up2
sub.w d0,Voice_Period(a6)
move.w Voice_Period(a6),d0
cmp.w #113,d0
bhi.s MGTK_Portamento_Up_Ok
move.w #113,Voice_Period(a6)
MGTK_Portamento_Up_Ok
move.w Voice_Period(a6),Voice_Sample_Period(a6)
rts
MGTK_Portamento_Down
moveq.l #0,d0
move.b Voice_Parameters(a6),d0
MGTK_Portamento_Down2
add.w d0,Voice_Period(a6)
move.w Voice_Period(a6),d0
cmp.w #856,d0
blo.s MGTK_Portamento_Down_Ok
move.w #856,Voice_Period(a6)
MGTK_Portamento_Down_Ok
move.w Voice_Period(a6),Voice_Sample_Period(a6)
rts
MGTK_Set_Tone_Portamento
lea.l MGTK_Period_Table(pc),a0
move.w Voice_Note(a6),d0
bsr MGTK_Find_Period
adda.w Voice_Sample_Fine_Tune(a6),a0
move.w (a0),d0
move.w d0,Voice_Wanted_Period(a6)
move.w Voice_Period(a6),d1
sf Voice_Tone_Port_Direction(a6)
cmp.w d1,d0
beq.s MGTK_Clear_Tone_Portamento
bge MGTK_Period_Nop
st Voice_Tone_Port_Direction(a6)
rts
MGTK_Clear_Tone_Portamento
clr.w Voice_Wanted_Period(a6)
rts
MGTK_Tone_Portamento
move.b Voice_Parameters(a6),d0
beq.s MGTK_Tone_Portamento_No_Change
move.b d0,Voice_Tone_Port_Speed(a6)
clr.b Voice_Parameters(a6)
MGTK_Tone_Portamento_No_Change
tst.w Voice_Wanted_Period(a6)
beq MGTK_Period_Nop
moveq.l #0,d0
move.b Voice_Tone_Port_Speed(a6),d0
tst.b Voice_Tone_Port_Direction(a6)
bne.s MGTK_Tone_Portamento_Up
MGTK_Tone_Portamento_Down
add.w d0,Voice_Period(a6)
move.w Voice_Wanted_Period(a6),d0
cmp.w Voice_Period(a6),d0
bgt.s MGTK_Tone_Portamento_Set_Period
move.w Voice_Wanted_Period(a6),Voice_Period(a6)
clr.w Voice_Wanted_Period(a6)
bra.s MGTK_Tone_Portamento_Set_Period
MGTK_Tone_Portamento_Up
sub.w d0,Voice_Period(a6)
move.w Voice_Wanted_Period(a6),d0
cmp.w Voice_Period(a6),d0
blt.s MGTK_Tone_Portamento_Set_Period
move.w Voice_Wanted_Period(a6),Voice_Period(a6)
clr.w Voice_Wanted_Period(a6)
MGTK_Tone_Portamento_Set_Period
move.w Voice_Period(a6),d0
tst.b Voice_Glissando_Control(a6)
beq.s MGTK_Glissando_Skip
lea.l MGTK_Period_Table(pc),a0
adda.w Voice_Sample_Fine_Tune(a6),a0
bsr MGTK_Find_Period
move.w (a0),d0
MGTK_Glissando_Skip
move.w d0,Voice_Sample_Period(a6)
rts
Mt_Vibrato
move.b Voice_Parameters(a6),d0
beq.s Mt_Vibrato2
move.b Voice_Vibrato_Command(a6),d2
and.b #$0f,d0
beq.s Mt_VibSkip
and.b #$f0,d2
or.b d0,d2
Mt_VibSkip
move.b Voice_Parameters(a6),d0
and.b #$f0,d0
beq.s Mt_vibskip2
and.b #$0f,d2
or.b d0,d2
Mt_vibskip2
move.b d2,Voice_Vibrato_Command(a6)
Mt_Vibrato2
move.b Voice_Vibrato_Position(a6),d0
lea.l MGTK_Sinus_Table(pc),a3
lsr.w #2,d0
and.w #$001f,d0
moveq.l #0,d2
move.b Voice_Vibrato_Control(a6),d2
and.b #$3,d2
beq.s Mt_Vib_Sine
lsl.b #3,d0
cmp.b #1,d2
beq.s Mt_Vib_RampDown
move.b #255,d2
bra.s Mt_Vib_Set
Mt_Vib_RampDown
tst.b Voice_Vibrato_Position(a6)
bpl.s Mt_Vib_RampDown2
move.b #255,d2
sub.b d0,d2
bra.s Mt_Vib_Set
Mt_Vib_RampDown2
move.b d0,d2
bra.s Mt_Vib_Set
Mt_Vib_Sine
move.b (a3,d0.w),d2
Mt_Vib_Set
move.b Voice_Vibrato_Command(a6),d0
and.w #15,d0
mulu.w d0,d2
lsr.w #7,d2
move.w Voice_Period(a6),d0
tst.b Voice_Vibrato_Position(a6)
bmi.s Mt_VibratoNeg
add.w d2,d0
bra.s Mt_Vibrato3
Mt_VibratoNeg
sub.w d2,d0
Mt_Vibrato3
move.w d0,Voice_Sample_Period(a6)
move.b Voice_Vibrato_Command(a6),d0
lsr.w #2,d0
and.w #$003c,d0
add.b d0,Voice_Vibrato_Position(a6)
rts
MGTK_Tone_Portamento_Plus_Volume_Slide
bsr MGTK_Tone_Portamento_No_Change
bra MGTK_Volume_Slide
MGTK_Vibrato_Plus_Volume_Slide
bsr.s Mt_Vibrato2
bra MGTK_Volume_Slide
Mt_Tremolo
move.b Voice_Parameters(a6),d0
beq.s Mt_Tremolo2
move.b Voice_Tremolo_Command(a6),d2
and.b #$0f,d0
beq.s Mt_treskip
and.b #$f0,d2
or.b d0,d2
Mt_treskip
move.b Voice_Parameters(a6),d0
and.b #$f0,d0
beq.s Mt_treskip2
and.b #$0f,d2
or.b d0,d2
Mt_treskip2
move.b d2,Voice_Tremolo_Command(a6)
Mt_Tremolo2
move.b Voice_Tremolo_Position(a6),d0
lea.l MGTK_Sinus_Table(pc),a3
lsr.w #2,d0
and.w #$001f,d0
moveq.l #0,d2
move.b Voice_Tremolo_Control(a6),d2
and.b #$3,d2
beq.s Mt_tre_sine
lsl.b #3,d0
cmp.b #1,d2
beq.s Mt_tre_rampdown
move.b #255,d2
bra.s Mt_tre_set
Mt_tre_rampdown
tst.b Voice_Tremolo_Position(a6)
bpl.s Mt_tre_rampdown2
move.b #255,d2
sub.b d0,d2
bra.s Mt_tre_set
Mt_tre_rampdown2
move.b d0,d2
bra.s Mt_tre_set
Mt_tre_sine
move.b (a3,d0.w),d2
Mt_tre_set
move.b Voice_Tremolo_Command(a6),d0
and.w #15,d0
mulu.w d0,d2
lsr.w #6,d2
moveq.l #0,d0
move.w Voice_Volume(a6),d0
tst.b Voice_Tremolo_Position(a6)
bmi.s Mt_TremoloNeg
add.w d2,d0
bra.s Mt_Tremolo3
Mt_TremoloNeg
sub.w d2,d0
Mt_Tremolo3
bpl.s Mt_TremoloSkip
clr.w d0
Mt_TremoloSkip
cmp.w #$40,d0
bls.s Mt_TremoloOk
move.w #$40,d0
Mt_TremoloOk
move.w d0,Voice_Sample_Volume(a6)
move.b Voice_Tremolo_Command(a6),d0
lsr.w #2,d0
and.w #$003c,d0
add.b d0,Voice_Tremolo_Position(a6)
bra MGTK_Period_Nop
MGTK_Sample_Offset
move.l Voice_Sample_Offset(a6),d0
moveq.l #0,d1
move.b Voice_Parameters(a6),d1
beq.s MGTK_Sample_Offset_No_New
lsl.w #8,d1
move.l d1,d0
MGTK_Sample_Offset_No_New
add.l Voice_Sample_Offset(a6),d0
cmp.l Voice_Sample_Length(a6),d0
ble.s MGTK_Sample_Offset_Ok
move.l Voice_Sample_Length(a6),d0
MGTK_Sample_Offset_Ok
move.l Voice_Start(a6),Voice_Sample_Start(a6)
move.l d0,Voice_Sample_Offset(a6)
move.l d0,Voice_Sample_Position(a6)
rts
MGTK_Volume_Slide
moveq.l #0,d0
move.b Voice_Parameters(a6),d0
lsr.w #4,d0
beq.s MGTK_Volume_Slide_Down
MGTK_Volume_Slide_Up
add.w d0,Voice_Volume(a6)
cmp.w #$40,Voice_Volume(a6)
ble.s MGTK_Volume_Slide_Up_Ok
move.w #$40,Voice_Volume(a6)
MGTK_Volume_Slide_Up_Ok
move.w Voice_Volume(a6),Voice_Sample_Volume(a6)
bra MGTK_Period_Nop
MGTK_Volume_Slide_Down
move.b Voice_Parameters(a6),d0
and.w #$0f,d0
MGTK_Volume_Slide_Down2
sub.w d0,Voice_Volume(a6)
bpl.s MGTK_Volume_Slide_Down_Ok
clr.w Voice_Volume(a6)
MGTK_Volume_Slide_Down_Ok
move.w Voice_Volume(a6),Voice_Sample_Volume(a6)
bra MGTK_Period_Nop
MGTK_Position_Jump
moveq.l #0,d0
move.b Voice_Parameters(a6),d0
move.w d0,MGTK_Position_Jump_Position
st MGTK_Position_Jump_Flag
rts
MGTK_Volume_Change
moveq.l #0,d0
move.b Voice_Parameters(a6),d0
cmp.b #$40,d0
ble.s MGTK_Volume_Change_Ok
moveq.l #$40,d0
MGTK_Volume_Change_Ok
move.w d0,Voice_Volume(a6)
move.w d0,Voice_Sample_Volume(a6)
rts
MGTK_Pattern_Break
moveq.l #0,d0
tst.b MGTK_Old_Module(pc)
bne.s MGTK_Pattern_Break_Ok
move.b Voice_Parameters(a6),d0
move.w d0,d2 ; Codage en BCD
lsr.w #4,d0 ; premier chiffre
mulu.w #10,d0 ; les dizaines
and.w #$0f,d2 ; deuxième chiffre
add.w d2,d0 ; les unités
cmp.w MGTK_Pattern_Length(pc),d0
blo.s MGTK_Pattern_Break_Ok
moveq.l #0,d0
MGTK_Pattern_Break_Ok
move.w d0,MGTK_Pattern_Break_Position
st MGTK_Pattern_Break_Flag
rts
MGTK_Set_Speed
moveq.l #0,d0
move.b Voice_Parameters(a6),d0
beq.s MGTK_End
cmp.b #32,d0
bhi.s MGTK_Set_Tempo
move.b d0,MGTK_Music_Speed
MGTK_End rts
MGTK_Set_Tempo
move.b d0,MGTK_Music_Tempo
MGTK_Search_Values_for_Tempo
movem.l d0-d3,-(sp)
moveq.l #0,d0
move.b MGTK_Music_Tempo(pc),d0
moveq.l #125,d1 ; 125
mulu.w MGTK_Replay_Frequency(pc),d1 ; * Frequence Replay
divu.l #50,d1 ; / 50
divu.l d0,d1 ; / Tempo
moveq.l #0,d3 ; = Nb Samples / Tick
MGTK_Search_Length_Loop
addq.b #1,d3 ; Cherche en
move.l d1,d2 ; combien de fois
divu.w d3,d2 ; on peut traiter
cmp.w #DSP_Buffer/2,d2 ; un 'tick'
bhi.s MGTK_Search_Length_Loop
move.w d3,MGTK_IT_Number
MGTK_Search_MFP_Divider
mulu.w d3,d0 ; Tempo*Nb ITs
mulu.w #50*256,d0 ; *50/125*256
divu.l #125,d0 ; = Freq Cherchée * 256
move.l #2457600/200*256,d2 ; Freq Base MFP
move.l d2,d3 ; / Prediviseur 200
divu.l d0,d2 ; / Freq donne Diviseur
move.b #7,MGTK_IT_Timer_Control
move.b d2,MGTK_IT_Timer_Data
movem.l (sp)+,d0-d3
rts
MGTK_Fine_Portamento_Up
move.b Voice_Parameters(a6),d0
and.w #$0f,d0
bra MGTK_Portamento_Up2
MGTK_Fine_Portamento_Down
move.b Voice_Parameters(a6),d0
and.w #$0f,d0
bra MGTK_Portamento_Down2
MGTK_Set_Glissando_Control
move.b Voice_Parameters(a6),Voice_Glissando_Control(a6)
rts
MGTK_Set_Vibrato_Control
move.b Voice_Parameters(a6),Voice_Vibrato_Control(a6)
rts
MGTK_Set_Fine_Tune
move.b Voice_Parameters(a6),d0
and.w #$0f,d0
mulu.w #12*3*2,d0
move.w d0,Voice_Sample_Fine_Tune(a6)
rts
MGTK_Pattern_Loop
move.b Voice_Parameters(a6),d0
and.w #$0f,d0
beq.s MGTK_Set_Loop_Position
tst.w MGTK_Pattern_Loop_Counter(pc)
beq.s MGTK_Set_Loop_Counter
subq.w #1,MGTK_Pattern_Loop_Counter
beq MGTK_Return
MGTK_Do_Loop
st MGTK_Pattern_Loop_Flag
rts
MGTK_Set_Loop_Counter
move.w d0,MGTK_Pattern_Loop_Counter
bra.s MGTK_Do_Loop
MGTK_Set_Loop_Position
move.w MGTK_Pattern_Position(pc),MGTK_Pattern_Loop_Position
rts
MGTK_Set_Tremolo_Control
move.b Voice_Parameters(a6),Voice_Tremolo_Control(a6)
rts
MGTK_Retrig_Note
move.b Voice_Parameters(a6),d0
and.w #$0f,d0
beq.s MGTK_No_Retrig_Note
moveq.l #0,d1
move.b MGTK_Music_Counter(pc),d1
bne.s MGTK_Retrig_Note_Skip
tst.w Voice_Note(a6)
bne.s MGTK_No_Retrig_Note
MGTK_Retrig_Note_Skip
divu.w d0,d1
swap.w d1
tst.w d1
bne.s MGTK_No_Retrig_Note
move.w Voice_Period(a6),Voice_Sample_Period(a6)
move.l Voice_Sample_Offset(a6),Voice_Sample_Position(a6)
MGTK_No_Retrig_Note
rts
MGTK_Volume_Fine_Up
move.b Voice_Parameters(a6),d0
and.w #$0f,d0
bra MGTK_Volume_Slide_Up
MGTK_Note_Cut
move.b Voice_Parameters(a6),d0
and.b #$0f,d0
cmp.b MGTK_Music_Counter(pc),d0
bne MGTK_Return
clr.w Voice_Volume(a6)
clr.w Voice_Sample_Volume(a6)
rts
MGTK_Note_Delay
move.b Voice_Parameters(a6),d0
and.b #$0f,d0
cmp.b MGTK_Music_Counter(pc),d0
bne MGTK_Return
tst.w Voice_Note(a6)
beq MGTK_Return
move.w Voice_Period(a6),Voice_Sample_Period(a6)
move.l Voice_Start(a6),Voice_Sample_Start(a6)
move.l Voice_Sample_Offset(a6),Voice_Sample_Position(a6)
rts
MGTK_Pattern_Delay
tst.b MGTK_Pattern_Delay_Time(pc)
bne MGTK_Return
move.b Voice_Parameters(a6),d0
and.b #$0f,d0
move.b d0,MGTK_Pattern_Delay_Time
rts
***********************************************************************
*********** Tables diverses ***********
***********************************************************************
MGTK_Sinus_Table
dc.b 0,24,49,74,97,120,141,161,180,197,212,224
dc.b 235,244,250,253,255,253,250,244,235,224
dc.b 212,197,180,161,141,120,97,74,49,24
MGTK_Period_Table
; Tuning 0, Normal
dc.w 856,808,762,720,678,640,604,570,538,508,480,453
dc.w 428,404,381,360,339,320,302,285,269,254,240,226
dc.w 214,202,190,180,170,160,151,143,135,127,120,113
; Tuning 1
dc.w 850,802,757,715,674,637,601,567,535,505,477,450
dc.w 425,401,379,357,337,318,300,284,268,253,239,225
dc.w 213,201,189,179,169,159,150,142,134,126,119,113
; Tuning 2
dc.w 844,796,752,709,670,632,597,563,532,502,474,447
dc.w 422,398,376,355,335,316,298,282,266,251,237,224
dc.w 211,199,188,177,167,158,149,141,133,125,118,112
; Tuning 3
dc.w 838,791,746,704,665,628,592,559,528,498,470,444
dc.w 419,395,373,352,332,314,296,280,264,249,235,222
dc.w 209,198,187,176,166,157,148,140,132,125,118,111
; Tuning 4
dc.w 832,785,741,699,660,623,588,555,524,495,467,441
dc.w 416,392,370,350,330,312,294,278,262,247,233,220
dc.w 208,196,185,175,165,156,147,139,131,124,117,110
; Tuning 5
dc.w 826,779,736,694,655,619,584,551,520,491,463,437
dc.w 413,390,368,347,328,309,292,276,260,245,232,219
dc.w 206,195,184,174,164,155,146,138,130,123,116,109
; Tuning 6
dc.w 820,774,730,689,651,614,580,547,516,487,460,434
dc.w 410,387,365,345,325,307,290,274,258,244,230,217
dc.w 205,193,183,172,163,154,145,137,129,122,115,109
; Tuning 7
dc.w 814,768,725,684,646,610,575,543,513,484,457,431
dc.w 407,384,363,342,323,305,288,272,256,242,228,216
dc.w 204,192,181,171,161,152,144,136,128,121,114,108
; Tuning -8
dc.w 907,856,808,762,720,678,640,604,570,538,508,480
dc.w 453,428,404,381,360,339,320,302,285,269,254,240
dc.w 226,214,202,190,180,170,160,151,143,135,127,120
; Tuning -7
dc.w 900,850,802,757,715,675,636,601,567,535,505,477
dc.w 450,425,401,379,357,337,318,300,284,268,253,238
dc.w 225,212,200,189,179,169,159,150,142,134,126,119
; Tuning -6
dc.w 894,844,796,752,709,670,632,597,563,532,502,474
dc.w 447,422,398,376,355,335,316,298,282,266,251,237
dc.w 223,211,199,188,177,167,158,149,141,133,125,118
; Tuning -5
dc.w 887,838,791,746,704,665,628,592,559,528,498,470
dc.w 444,419,395,373,352,332,314,296,280,264,249,235
dc.w 222,209,198,187,176,166,157,148,140,132,125,118
; Tuning -4
dc.w 881,832,785,741,699,660,623,588,555,524,494,467
dc.w 441,416,392,370,350,330,312,294,278,262,247,233
dc.w 220,208,196,185,175,165,156,147,139,131,123,117
; Tuning -3
dc.w 875,826,779,736,694,655,619,584,551,520,491,463
dc.w 437,413,390,368,347,328,309,292,276,260,245,232
dc.w 219,206,195,184,174,164,155,146,138,130,123,116
; Tuning -2
dc.w 868,820,774,730,689,651,614,580,547,516,487,460
dc.w 434,410,387,365,345,325,307,290,274,258,244,230
dc.w 217,205,193,183,172,163,154,145,137,129,122,115
; Tuning -1
dc.w 862,814,768,725,684,646,610,575,543,513,484,457
dc.w 431,407,384,363,342,323,305,288,272,256,242,228
dc.w 216,203,192,181,171,161,152,144,136,128,121,114
***********************************************************************
*********** Routines DSP : Loader et Replay ***********
***********************************************************************
MGTK_DSP_Replay_Code
IncBin 'AMIGADSP.P56'
MGTK_DSP_Replay_Size equ (*-MGTK_DSP_Replay_Code)/3
Even
***********************************************************************
*********** Positions Stéréo des voies ***********
***********************************************************************
; Le DSP mixe dans l'ordre Gauche-Droite-Gauche-etc...
; Cette Table donne pour chaque voie l'offset à la Voie suivante
MGTK_Panoramics
; les Voies FX L-R-L-R
dc.l +1*Voice_Size,+1*Voice_Size,+1*Voice_Size,+1*Voice_Size
; les Voies Normales L-R-R-L
; 1 + 1 -> 2 + 2 -> 4 - 1 -> 3 + 2 -> 5
Rept 8
dc.l +1*Voice_Size,+2*Voice_Size,+2*Voice_Size,-1*Voice_Size
EndR
***********************************************************************
*********** Variables diverses ***********
***********************************************************************
MGTK_Module_Adr ds.l 1
MGTK_WorkSpace_Adr ds.l 1
MGTK_Module_End_Adr ds.l 1
MGTK_Nb_Voices ds.w 1
MGTK_Nb_Samples ds.w 1
MGTK_Sequence_Adr ds.l 1
MGTK_Patterns_Adr ds.l 1
MGTK_Samples_Adr ds.l 31
MGTK_Line_Size ds.w 1
MGTK_Pattern_Size ds.w 1
MGTK_Music_Position ds.w 1
MGTK_Music_Length ds.w 1
MGTK_Music_Restart ds.w 1
MGTK_Music_Tempo ds.b 1
MGTK_Music_Speed ds.b 1
MGTK_Music_Counter ds.b 1
ds.b 1
MGTK_Restart_Loop ds.b 1
MGTK_Restart_Done ds.b 1
MGTK_Replay_Paused ds.b 1
MGTK_Replay_Stopped ds.b 1
MGTK_IT_Timer_Control ds.b 1
MGTK_IT_Timer_Data ds.b 1
MGTK_IT_Number ds.w 1
MGTK_IT_Counter ds.w 1
MGTK_Frequency_Divider ds.w 1
MGTK_Replay_Frequency ds.w 1
MGTK_Replay_Satured ds.w 1
MGTK_Replay_Problem ds.b 1
MGTK_Replay_In_Service ds.b 1
MGTK_Master_Volume_Left ds.w 1
MGTK_Master_Volume_Right ds.w 1
MGTK_Pattern_Position ds.w 1
MGTK_Pattern_Length ds.w 1
MGTK_Pattern_Loop_Counter ds.w 1
MGTK_Pattern_Loop_Position ds.w 1
MGTK_Pattern_Break_Position ds.w 1
MGTK_Position_Jump_Position ds.w 1
MGTK_Position_Jump_Flag ds.b 1
MGTK_Pattern_Loop_Flag ds.b 1
MGTK_Pattern_Break_Flag ds.b 1
MGTK_Pattern_Delay_Time ds.b 1
MGTK_Old_Module ds.b 1
Even
MGTK_Fx_Voices ds.b 4*Voice_Size
MGTK_Voices ds.b 32*Voice_Size