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Text File | 1995-09-17 | 43.1 KB | 1,733 lines |
- ***********************************************************************
- *********** ***********
- *********** ***********
- *********** Amiga 4 Interlaced Voices 030 Replay ***********
- *********** ***********
- *********** ***********
- *********** By Simplet / FATAL DESIGN ***********
- *********** ***********
- ***********************************************************************
-
- Section TEXT
-
- Freq_No equ 1
- Freq_Replay equ 25175000/256/2/(Freq_No+1)
-
- CPU_Time equ 0
-
- XDef MGTK_Init_Module_Samples
- 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_Voices,MGTK_Restart_Loop,MGTK_Restart_Done
-
- ***********************************************************************
- *********** 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_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_Sample_Frac 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 : ***********
- *********** ***********
- *********** Jouer/arrêter le module, Position ***********
- *********** précédente/suivante, Saut à une Position ***********
- *********** ***********
- ***********************************************************************
-
- ; 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_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
-
- ;
- ; 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
- move.w #1234,d4
-
- lea.l MGTK_Voices(pc),a6
- moveq.l #4-1,d7
-
- MGTK_Clear_A_Voice
- 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.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.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
-
- cmp.l #'M.K.',d3
- beq.s MGTK_Format_Ok
- cmp.l #'M!K!',d3
- beq.s MGTK_Format_Ok
- cmp.l #'M&K&',d3
- beq.s 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
-
- ; Si rien de spécial alors c'est un ancien module 15 instruments
- lea.l 20+15*30+2(a0),a5
- lea.l 128(a5),a6
- moveq.l #15,d0
- 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 d2,MGTK_Pattern_Length
-
- moveq.l #4*4,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
-
- lea.l MGTK_Volume_Table+65*256(pc),a0
- moveq.l #65-1,d7
- MGTK_Make_Volume_Table
- move.w #256-1,d6
- MGTK_Make_Volume_Table_Loop
- move.w d6,d0
- ext.w d0
- muls.w d7,d0
- asr.w #6,d0
- move.b d0,-(a0)
- dbra d6,MGTK_Make_Volume_Table_Loop
- dbra d7,MGTK_Make_Volume_Table
-
- 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
-
- ***********************************************************************
- *********** 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
- * Sélectionne Interruption Timer A en PlayBack
- move.b #%0100,$ffff8900.w
- * Stoppe le DMA et sélectionne registres en PlayBack
- clr.b $ffff8901.w
- * Une seule piste et DAC sur piste 0
- clr.b $ffff8920.w
- * 8 bits Stereo
- clr.b $ffff8921.w
- * Source DMA-Play sur Horloge Interne 25.175 MHz, Handshaking Off
- move.w #%0001,$ffff8930.w
- * Destination DAC connecté sur source DMA-Play, Handshaking Off
- move.w #%0000111111111111,$ffff8932.w
- * Fréquence
- move.b #Freq_No,$ffff8935.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
- ; Et Active le DMA
-
- MGTK_Init_IT
- pea.l (a2)
- pea.l MGTK_Replay_Timer(pc) ; Adresse Vecteur
- moveq.l #0,d0
- move.w #1,-(sp) ; 1 interruption
- move.w #8,-(sp) ; Mode Event Count
- clr.w -(sp) ; Timer No 0
- move.w #31,-(sp) ; Xbtimer
- trap #14 ; XBios
- lea.l 12(sp),sp
- pea.l MGTKInitDMA(pc)
- move.w #38,-(sp) ; Supexec
- trap #14 ; XBios
- addq.l #6,sp
- movea.l (sp)+,a2
- rts
- MGTKInitDMA
- move.l MGTK_Adr_Buffer1(pc),d0
- move.l d0,d1
- addq.l #8,d1
- * Début du Sample
- move.b d0,$ffff8907.w
- lsr.w #8,d0
- move.l d0,$ffff8902.w
- * Fin du Sample
- move.b d1,$ffff8913.w
- lsr.w #8,d1
- move.l d1,$ffff890e.w
- * Lance Lecture DMA Bouclée
- move.b #%11,$ffff8901.w
- rts
-
- ; Enlève l'interruption Timer A du Player
- ; Et Stoppe le DMA
-
- 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 MGTKStopDMA(pc)
- move.w #38,-(sp) ; Supexec
- trap #14 ; XBios
- addq.l #6,sp
- movea.l (sp)+,a2
- rts
- MGTKStopDMA
- clr.b $ffff8901.w
- rts
-
- ***********************************************************************
- *********** Interruptions du Replay Soundtracker ***********
- ***********************************************************************
-
- MGTK_Replay_Timer
- move.w #$2300,sr
- bclr.b #5,$fffffa0f.w ; à Cause du mode SEI
-
- SaveColor
- CPUTimeColor #$dd550088
- movem.l d0-d7/a0-a6,-(sp)
-
- move.l MGTK_Adr_Buffer2(pc),d0
- move.l MGTK_Adr_Buffer1(pc),MGTK_Adr_Buffer2
- move.l d0,MGTK_Adr_Buffer1
-
- moveq.l #0,d1
- move.w MGTK_IT_Nb_Samples(pc),d1
- lsl.w #2,d1
- add.l d0,d1
-
- * Début du Sample
- move.b d0,$ffff8907.w
- lsr.w #8,d0
- move.l d0,$ffff8902.w
-
- * Fin du Sample
- move.b d1,$ffff8913.w
- lsr.w #8,d1
- move.l d1,$ffff890e.w
-
- * Relance le DMA
- move.b #%11,$ffff8901.w
-
- * Calcule Voie 1 à Gauche et 2 à Droite
- lea.l MGTK_Voices(pc),a5
- lea.l Voice_Size(a5),a6
- movea.l MGTK_Adr_Buffer1(pc),a0
- bsr.s MGTK_Calc_Voices
- * Calcule Voie 4 à Gauche et 3 à Droite
- lea.l 3*Voice_Size(a5),a5
- lea.l -Voice_Size(a5),a6
- movea.l MGTK_Adr_Buffer1(pc),a0
- addq.l #2,a0
- bsr.s MGTK_Calc_Voices
-
- CPUTimeColor #$99990099
- bsr MGTK_Play_Patterns
-
- movem.l (sp)+,d0-d7/a0-a6
- RestoreColor
- rte
-
- * Rééchantillone deux voies
-
- MGTK_Calc_Voices
- movea.l Voice_Sample_Position(a5),a1
- move.l Voice_Sample_Start(a5),d0
- bne.s MGTK_Spl_Adr_Ok1
- move.l #MGTK_Empty_Buffer,d0
- clr.l Voice_Sample_Position(a5)
- suba.w a1,a1
- MGTK_Spl_Adr_Ok1
- adda.l d0,a1
- movea.l Voice_Sample_Position(a6),a3
- move.l Voice_Sample_Start(a6),d0
- bne.s MGTK_Spl_Adr_Ok2
- move.l #MGTK_Empty_Buffer,d0
- clr.l Voice_Sample_Position(a6)
- suba.w a3,a3
- MGTK_Spl_Adr_Ok2
- adda.l d0,a3
-
- move.w Voice_Sample_Volume(a5),d0
- lsl.l #8,d0
- lea.l (MGTK_Volume_Table,pc,d0.w),a2
- move.w Voice_Sample_Volume(a6),d0
- lsl.l #8,d0
- lea.l (MGTK_Volume_Table,pc,d0.w),a4
-
- move.l #$10000*428/Freq_Replay*8363,d0
- move.l d0,d2
- moveq.l #0,d5
- move.w Voice_Sample_Period(a5),d5
- divu.l d5,d0
- move.w Voice_Sample_Period(a6),d5
- divu.l d5,d2
- move.w d0,d6
- move.w d2,d0
- move.w d6,d2
- swap.w d0
- swap.w d2
- moveq.l #0,d1
- move.w Voice_Sample_Frac(a6),d1
- swap.w d1
- moveq.l #0,d3
- move.w Voice_Sample_Frac(a5),d3
- swap.w d3
-
- moveq.l #0,d4
- moveq.l #0,d5
- move.w MGTK_IT_Nb_Samples(pc),d7
- subq.w #1,d7
- MGTK_Calc_Loop
- move.b (a1,d1.w),d4
- addx.l d0,d1
- move.b (a3,d3.w),d5
- move.w (a2,d4.w),d6
- addx.l d2,d3
- move.b (a4,d5.w),d6
- move.w d6,(a0)
- addq.l #4,a0
- dbra d7,MGTK_Calc_Loop
-
- swap.w d1
- move.w d1,Voice_Sample_Frac(a6)
- clr.w d1
- swap.w d1
- add.l Voice_Sample_Position(a5),d1
-
- move.l Voice_Sample_Loop_Length(a5),d0
- bne.s MGTK_Replay_Loop1
-
- MGTK_Replay_No_Loop1
- cmp.l Voice_Sample_Length(a5),d1 ; A-t'on dépassé la fin
- blo.s MGTK_Replay_Pos_Ok1 ; du Sample ?
-
- clr.l Voice_Sample_Start(a5) ; Oui, alors sample
- bra.s MGTK_Replay_Pos_Ok1 ; désactivé
-
- MGTK_Replay_Loop1
- cmp.l Voice_Sample_Length(a5),d1 ; A-t'on dépassé la
- blo.s MGTK_Replay_Pos_Ok1 ; fin de la boucle ?
-
- sub.l d0,d1 ; Si oui, reboucle
- bra.s MGTK_Replay_Loop1 ; tant qu'il faut
-
- MGTK_Replay_Pos_Ok1
- move.l d1,Voice_Sample_Position(a5) ; Nouvelle position
-
- swap.w d3
- move.w d3,Voice_Sample_Frac(a5)
- clr.w d3
- swap.w d3
- add.l Voice_Sample_Position(a6),d3
-
- move.l Voice_Sample_Loop_Length(a6),d0
- bne.s MGTK_Replay_Loop2
-
- MGTK_Replay_No_Loop2
- cmp.l Voice_Sample_Length(a6),d3 ; A-t'on dépassé la fin
- blo.s MGTK_Replay_Pos_Ok2 ; du Sample ?
-
- clr.l Voice_Sample_Start(a6) ; Oui, alors sample
- bra.s MGTK_Replay_Pos_Ok2 ; désactivé
-
- MGTK_Replay_Loop2
- cmp.l Voice_Sample_Length(a6),d3 ; A-t'on dépassé la
- blo.s MGTK_Replay_Pos_Ok2 ; fin de la boucle ?
-
- sub.l d0,d3 ; Si oui, reboucle
- bra.s MGTK_Replay_Loop2 ; tant qu'il faut
-
- MGTK_Replay_Pos_Ok2
- move.l d3,Voice_Sample_Position(a6) ; Nouvelle position
- rts
-
- MGTK_Adr_Buffer1
- dc.l MGTK_Buffer1
- MGTK_Adr_Buffer2
- dc.l MGTK_Buffer2
-
- ***********************************************************************
- *********** 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 $ffff8901.w ; Stoppe DMA PlayBack
- clr.b $fffffa19.w ; Coupe Timer
- bclr.b #5,$fffffa07.w ; Désautorise Timer
- bclr.b #5,$fffffa13.w ; DéMaske Timer
-
- 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
- moveq.l #4-1,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
- moveq.l #4-1,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-d1,-(sp)
- moveq.l #0,d0
- move.b MGTK_Music_Tempo(pc),d0
-
- move.l #Freq_Replay*125/50,d1
- divu.w d0,d1 ; / Tempo
- move.w d1,MGTK_IT_Nb_Samples ; = Nb Samples / Tick
- movem.l (sp)+,d0-d1
- 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
-
- ***********************************************************************
- *********** Variables diverses ***********
- ***********************************************************************
-
- MGTK_Module_Adr ds.l 1
- MGTK_WorkSpace_Adr ds.l 1
- MGTK_Module_End_Adr ds.l 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
-
- MGTK_Restart_Loop ds.b 1
- MGTK_Restart_Done ds.b 1
- MGTK_Replay_Paused ds.b 1
- MGTK_Replay_Stopped ds.b 1
- ds.b 1
- MGTK_IT_Nb_Samples 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_Voices ds.b 4*Voice_Size
-
- MGTK_Volume_Table ds.b 65*256
- MGTK_Buffer1 ds.l 1922 ; Maxi Tempo 32
- MGTK_Buffer2 ds.l 1922
- MGTK_Empty_Buffer ds.b 672 ; Maxi 4*8363 Hz
-