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PT3.asm
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;Universal PT2 and PT3 player for ZX Spectrum and MSX
;(c)2004-2007 S.V.Bulba <[email protected]>
;http://bulba.untergrund.net (http://bulba.at.kz)
;With modifications from RomWBW by Wayne Warthen
;https://github.com/wwarthen/RomWBW/blob/master/Source/Apps/Tune/Tune.asm
;Release number
Release EQU '1'
;Conditional assembly
;1) Version of ROUT (ZX or MSX standards)
ZX EQU 0
MSX EQU 0
WBW EQU 1
;2) Current position counter at (START+11)
CurPosCounter EQU 0
;3) Allow channels allocation bits at (START+10)
ACBBAC EQU 0
;4) Allow loop checking and disabling
LoopChecker EQU 1
;5) Insert official identificator
Id EQU 1
PORTS:
RSEL: DEFB $68 ; Register selection port
RDAT: DEFB $60 ; Register data port
Z180: DEFB $C0 ; Z180 base I/O port
DCSAV: DEFB 0 ; for saving original Z180 DCNTL value
TMP: DEFB 0 ; work around use of undocumented Z80
;Features
;--------
;-Can be compiled at any address (i.e. no need rounding ORG
; address).
;-Variables (VARS) can be located at any address (not only after
;code block).
;-INIT subprogram checks PT3-module version and rightly
; generates both note and volume tables outside of code block
; (in VARS).
;-Two portamento (spc. command 3xxx) algorithms (depending of
; PT3 module version).
;-New 1.XX and 2.XX special command behaviour (only for PT v3.7
; and higher).
;-Any Tempo value are accepted (including Tempo=1 and Tempo=2).
;-Fully compatible with Ay_Emul PT3 and PT2 players codes.
;-See also notes at the end of this source code.
;Limitations
;-----------
;-Can run in RAM only (self-modified code is used).
;-PT2 position list must be end by $FF marker only.
;Warning!!! PLAY subprogram can crash if no module are loaded
;into RAM or INIT subprogram was not called before.
;Call MUTE or INIT one more time to mute sound after stopping
;playing
;ORG $C000
;Test codes (commented)
; LD A,2 ;PT2,ABC,Looped
; LD (START+10),A
; CALL START
; EI
;_LP HALT
; CALL START+5
; XOR A
; IN A,($FE)
; CPL
; AND 15
; JR Z,_LP
; JR START+8
TonA EQU 0
TonB EQU 2
TonC EQU 4
Noise EQU 6
Mixer EQU 7
AmplA EQU 8
AmplB EQU 9
AmplC EQU 10
Env EQU 11
EnvTp EQU 13
;ChannelsVars
; STRUCT CHP
;reset group
PsInOr EQU 0
PsInSm EQU 1
CrAmSl EQU 2
CrNsSl EQU 3
CrEnSl EQU 4
TSlCnt EQU 5
CrTnSl EQU 6
TnAcc EQU 8
COnOff EQU 10
;reset group
OnOffD EQU 11
;IX for PTDECOD here (+12)
OffOnD EQU 12
OrnPtr EQU 13
SamPtr EQU 15
NNtSkp EQU 17
Note EQU 18
SlToNt EQU 19
Env_En EQU 20
Flags EQU 21
;Enabled - 0,SimpleGliss - 2
TnSlDl EQU 22
TSlStp EQU 23
TnDelt EQU 25
NtSkCn EQU 27
Volume EQU 28
; ENDS
CHP EQU 29
;Entry and other points
;START initialize playing of module at MDLADDR
;START+3 initialization with module address in HL
;START+5 play one quark
;START+8 mute
;START+10 setup and status flags
;START+11 current position value (byte) (optional)
START:
LD HL,MDLADDR
JR INIT
JP PLAY
JR MUTE
SETUP: DEFB 0 ;set bit0, if you want to play without looping
;(optional);
;set bit1 for PT2 and reset for PT3 before
;calling INIT;
;bits2-3: %00-ABC, %01 ACB, %10 BAC (optional);
;bits4-6 are not used
;bit7 is set each time, when loop point is passed
;(optional)
IF CurPosCounter
CurPos: DEFB 0 ;for visualization only (i.e. no need for playing)
ENDIF
;Identifier
IF Id
DEFB "=Uni PT2 and PT3 Player r.",Release,"="
ENDIF
IF LoopChecker
CHECKLP: LD HL,SETUP
SET 7,(HL)
BIT 0,(HL)
RET Z
POP HL
LD HL,DelyCnt
INC (HL)
LD HL,ChanA+NtSkCn
INC (HL)
ENDIF
MUTE: XOR A
LD H,A
LD L,A
LD (AYREGS+AmplA),A
LD (AYREGS+AmplB),HL
JP ROUT
INIT:
;HL - AddressOfModule
LD A,(START+10)
AND 2
JR NZ,INITPT2
CALL SETMDAD
PUSH HL
LD DE,100
ADD HL,DE
LD A,(HL)
LD (Delay),A
PUSH HL
POP IX
ADD HL,DE
LD (CrPsPtr),HL
LD E,(IX+102-100)
INC HL
IF CurPosCounter
LD A,L
LD (PosSub+1),A
ENDIF
ADD HL,DE
LD (LPosPtr),HL
POP DE
LD L,(IX+103-100)
LD H,(IX+104-100)
ADD HL,DE
LD (PatsPtr),HL
LD HL,169
ADD HL,DE
LD (OrnPtrs),HL
LD HL,105
ADD HL,DE
LD (SamPtrs),HL
LD A,(IX+13-100) ;EXTRACT VERSION NUMBER
SUB $30
JR C,L20
CP 10
JR C,L21
L20: LD A,6
L21: LD (Version),A
PUSH AF ;VolTable version
CP 4
LD A,(IX+99-100) ;TONE TABLE NUMBER
RLA
AND 7
PUSH AF ;NoteTable number
LD HL,$18+256*(e_-SamCnv-2)
LD (SamCnv),HL
LD A,$BA
LD (OrnCP),A
LD (SamCP),A
LD A,$7B
LD (OrnLD),A
LD (SamLD),A
LD A,$87
LD (SamClc2),A
LD BC,PT3PD
LD HL,0
LD DE,PT3EMPTYORN
JR INITCOMMON
INITPT2:
LD A,(HL)
LD (Delay),A
PUSH HL
PUSH HL
PUSH HL
INC HL
INC HL
LD A,(HL)
INC HL
LD (SamPtrs),HL
LD E,(HL)
INC HL
LD D,(HL)
POP HL
AND A
SBC HL,DE
CALL SETMDAD
POP HL
LD DE,67
ADD HL,DE
LD (OrnPtrs),HL
LD E,32
ADD HL,DE
LD C,(HL)
INC HL
LD B,(HL)
LD E,30
ADD HL,DE
LD (CrPsPtr),HL
LD E,A
INC HL
IF CurPosCounter
LD A,L
LD (PosSub+1),A
ENDIF
ADD HL,DE
LD (LPosPtr),HL
POP HL
ADD HL,BC
LD (PatsPtr),HL
LD A,5
LD (Version),A
PUSH AF
LD A,2
PUSH AF
LD HL,$51CB
LD (SamCnv),HL
LD A,$BB
LD (OrnCP),A
LD (SamCP),A
LD A,$7A
LD (OrnLD),A
LD (SamLD),A
LD A,$80
LD (SamClc2),A
LD BC,PT2PD
LD HL,$8687
LD DE,PT2EMPTYORN
INITCOMMON:
LD (PTDECOD+1),BC
LD (PsCalc),HL
PUSH DE
;note table data depacker
;(c) Ivan Roshin
LD DE,T_PACK
LD BC,T1_+(2*49)-1
TP_0: LD A,(DE)
INC DE
CP 15*2
JR NC,TP_1
LD H,A
LD A,(DE)
LD L,A
INC DE
JR TP_2
TP_1: PUSH DE
LD D,0
LD E,A
ADD HL,DE
ADD HL,DE
POP DE
TP_2: LD A,H
LD (BC),A
DEC BC
LD A,L
LD (BC),A
DEC BC
SUB $FF&($F8*2)
JR NZ,TP_0
IF LoopChecker
LD HL,SETUP
RES 7,(HL)
IF CurPosCounter
INC HL
LD (HL),A
ENDIF
ELSE
IF CurPosCounter
LD (CurPos),A
ENDIF
ENDIF
LD HL,VARS
LD (HL),A
LD DE,VARS+1
LD BC,VAR0END-VARS-1
LDIR
LD (AdInPtA),HL ;ptr to zero
INC A
LD (DelyCnt),A
LD HL,$F001 ;H - Volume, L - NtSkCn
LD (ChanA+NtSkCn),HL
LD (ChanB+NtSkCn),HL
LD (ChanC+NtSkCn),HL
POP HL
LD (ChanA+OrnPtr),HL
LD (ChanB+OrnPtr),HL
LD (ChanC+OrnPtr),HL
POP AF
;NoteTableCreator (c) Ivan Roshin
;A - NoteTableNumber*2+VersionForNoteTable
;(xx1b - 3.xx..3.4r, xx0b - 3.4x..3.6x..VTII1.0)
LD HL,NT_DATA
PUSH DE
LD D,B
ADD A,A
LD E,A
ADD HL,DE
LD E,(HL)
INC HL
SRL E
SBC A,A
AND $A7 ;$00 (NOP) or $A7 (AND A)
LD (L3),A
EX DE,HL
POP BC ;BC=T1_
ADD HL,BC
LD A,(DE)
ADD A,T_ & $FF
LD C,A
ADC A,T_/256
SUB C
LD B,A
PUSH BC
LD DE,NT_
PUSH DE
LD B,12
LD IX,TMP ; +WW
L1: PUSH BC
LD C,(HL)
INC HL
PUSH HL
LD B,(HL)
PUSH DE
EX DE,HL
LD DE,23
;LD IXH,8 ; -WW
LD (IX),8 ; +WW
L2: SRL B
RR C
L3: DEFB $19 ;AND A or NOP
LD A,C
ADC A,D ;=ADC 0
LD (HL),A
INC HL
LD A,B
ADC A,D
LD (HL),A
ADD HL,DE
;DEC IXH ; -WW
DEC (IX) ; +WW
JR NZ,L2
POP DE
INC DE
INC DE
POP HL
INC HL
POP BC
DJNZ L1
POP HL
POP DE
LD A,E
CP TCOLD_1 & $FF
JR NZ,CORR_1
LD A,$FD
LD (NT_+$2E),A
CORR_1: LD A,(DE)
AND A
JR Z,TC_EXIT
RRA
PUSH AF
ADD A,A
LD C,A
ADD HL,BC
POP AF
JR NC,CORR_2
DEC (HL)
DEC (HL)
CORR_2: INC (HL)
AND A
SBC HL,BC
INC DE
JR CORR_1
TC_EXIT:
POP AF
;VolTableCreator (c) Ivan Roshin
;A - VersionForVolumeTable (0..4 - 3.xx..3.4x;
;5.. - 2.x,3.5x..3.6x..VTII1.0)
CP 5
LD HL,$11
LD D,H
LD E,H
LD A,$17
JR NC,M1
DEC L
LD E,L
XOR A
M1: LD (M2),A
LD IX,VT_+16
LD C,$F
INITV2: PUSH HL
ADD HL,DE
EX DE,HL
SBC HL,HL
LD B,$10
INITV1: LD A,L
M2: DEFB $7D
LD A,H
ADC A,0
LD (IX),A
INC IX
ADD HL,DE
DJNZ INITV1
POP HL
LD A,E
CP $77
JR NZ,M3
INC E
M3: DEC C
JR NZ,INITV2
JP ROUT
SETMDAD:
LD (MODADDR),HL
LD (MDADDR1),HL
LD (MDADDR2),HL
RET
PTDECOD:
JP $C3C3
;PT2 pattern decoder
PD2_SAM:
CALL SETSAM
JR PD2_LOOP
PD2_EOff:
LD (IX-12+Env_En),A
JR PD2_LOOP
PD2_ENV:
LD (IX-12+Env_En),16
LD (AYREGS+EnvTp),A
LD A,(BC)
INC BC
LD L,A
LD A,(BC)
INC BC
LD H,A
LD (EnvBase),HL
JR PD2_LOOP
PD2_ORN:
CALL SETORN
JR PD2_LOOP
PD2_SKIP:
INC A
LD (IX-12+NNtSkp),A
JR PD2_LOOP
PD2_VOL:
RRCA
RRCA
RRCA
RRCA
LD (IX-12+Volume),A
JR PD2_LOOP
PD2_DEL:
CALL C_DELAY
JR PD2_LOOP
PD2_GLIS:
SET 2,(IX-12+Flags)
INC A
LD (IX-12+TnSlDl),A
LD (IX-12+TSlCnt),A
LD A,(BC)
INC BC
LD (IX-12+TSlStp),A
ADD A,A
SBC A,A
LD (IX-12+TSlStp+1),A
SCF
JR PD2_LP2
PT2PD: AND A
PD2_LP2:
EX AF,AF'
PD2_LOOP:
LD A,(BC)
INC BC
ADD A,$20
JR Z,PD2_REL
JR C,PD2_SAM
ADD A,96
JR C,PD2_NOTE
INC A
JR Z,PD2_EOff
ADD A,15
JP Z,PD_FIN
JR C,PD2_ENV
ADD A,$10
JR C,PD2_ORN
ADD A,$40
JR C,PD2_SKIP
ADD A,$10
JR C,PD2_VOL
INC A
JR Z,PD2_DEL
INC A
JR Z,PD2_GLIS
INC A
JR Z,PD2_PORT
INC A
JR Z,PD2_STOP
LD A,(BC)
INC BC
LD (IX-12+CrNsSl),A
JR PD2_LOOP
PD2_PORT:
RES 2,(IX-12+Flags)
LD A,(BC)
INC BC
INC BC ;ignoring precalc delta to right sound
INC BC
SCF
JR PD2_LP2
PD2_STOP:
LD (IX-12+TSlCnt),A
JR PD2_LOOP
PD2_REL:
LD (IX-12+Flags),A
JR PD2_EXIT
PD2_NOTE:
LD L,A
LD A,(IX-12+Note)
LD (PrNote+1),A
LD (IX-12+Note),L
XOR A
LD (IX-12+TSlCnt),A
SET 0,(IX-12+Flags)
EX AF,AF'
JR NC,NOGLIS2
BIT 2,(IX-12+Flags)
JR NZ,NOPORT2
LD (LoStep),A
ADD A,A
SBC A,A
EX AF,AF'
LD H,A
LD L,A
INC A
CALL SETPORT
NOPORT2:
LD (IX-12+TSlCnt),1
NOGLIS2:
XOR A
PD2_EXIT:
LD (IX-12+PsInSm),A
LD (IX-12+PsInOr),A
LD (IX-12+CrTnSl),A
LD (IX-12+CrTnSl+1),A
JP PD_FIN
;PT3 pattern decoder
PD_OrSm:
LD (IX-12+Env_En),0
CALL SETORN
PD_SAM_:
LD A,(BC)
INC BC
RRCA
PD_SAM: CALL SETSAM
JR PD_LOOP
PD_VOL: RRCA
RRCA
RRCA
RRCA
LD (IX-12+Volume),A
JR PD_LP2
PD_EOff:
LD (IX-12+Env_En),A
LD (IX-12+PsInOr),A
JR PD_LP2
PD_SorE:
DEC A
JR NZ,PD_ENV
LD A,(BC)
INC BC
LD (IX-12+NNtSkp),A
JR PD_LP2
PD_ENV: CALL SETENV
JR PD_LP2
PD_ORN: CALL SETORN
JR PD_LOOP
PD_ESAM:
LD (IX-12+Env_En),A
LD (IX-12+PsInOr),A
CALL NZ,SETENV
JR PD_SAM_
PT3PD: LD A,(IX-12+Note)
LD (PrNote+1),A
LD L,(IX-12+CrTnSl)
LD H,(IX-12+CrTnSl+1)
LD (PrSlide+1),HL
PD_LOOP:
LD DE,$2010
PD_LP2: LD A,(BC)
INC BC
ADD A,E
JR C,PD_OrSm
ADD A,D
JR Z,PD_FIN
JR C,PD_SAM
ADD A,E
JR Z,PD_REL
JR C,PD_VOL
ADD A,E
JR Z,PD_EOff
JR C,PD_SorE
ADD A,96
JR C,PD_NOTE
ADD A,E
JR C,PD_ORN
ADD A,D
JR C,PD_NOIS
ADD A,E
JR C,PD_ESAM
ADD A,A
LD E,A
LD HL,SPCCOMS+$FF20-$2000
ADD HL,DE
LD E,(HL)
INC HL
LD D,(HL)
PUSH DE
JR PD_LOOP
PD_NOIS:
LD (Ns_Base),A
JR PD_LP2
PD_REL: RES 0,(IX-12+Flags)
JR PD_RES
PD_NOTE:
LD (IX-12+Note),A
SET 0,(IX-12+Flags)
XOR A
PD_RES: LD (PDSP_+1),SP
LD SP,IX
LD H,A
LD L,A
PUSH HL
PUSH HL
PUSH HL
PUSH HL
PUSH HL
PUSH HL
PDSP_: LD SP,$3131
PD_FIN: LD A,(IX-12+NNtSkp)
LD (IX-12+NtSkCn),A
RET
C_PORTM:
LD A,(BC)
INC BC
;SKIP PRECALCULATED TONE DELTA (BECAUSE
;CANNOT BE RIGHT AFTER PT3 COMPILATION)
INC BC
INC BC
EX AF,AF'
LD A,(BC) ;SIGNED TONE STEP
INC BC
LD (LoStep),A
LD A,(BC)
INC BC
AND A
EX AF,AF'
LD L,(IX-12+CrTnSl)
LD H,(IX-12+CrTnSl+1)
;Set portamento variables
;A - Delay; A' - Hi(Step); ZF' - (A'=0); HL - CrTnSl
SETPORT:
RES 2,(IX-12+Flags)
LD (IX-12+TnSlDl),A
LD (IX-12+TSlCnt),A
PUSH HL
LD DE,NT_
LD A,(IX-12+Note)
LD (IX-12+SlToNt),A
ADD A,A
LD L,A
LD H,0
ADD HL,DE
LD A,(HL)
INC HL
LD H,(HL)
LD L,A
PUSH HL
PrNote: LD A,$3E
LD (IX-12+Note),A
ADD A,A
LD L,A
LD H,0
ADD HL,DE
LD E,(HL)
INC HL
LD D,(HL)
POP HL
SBC HL,DE
LD (IX-12+TnDelt),L
LD (IX-12+TnDelt+1),H
POP DE
Version EQU $+1
LD A,$3E
CP 6
JR C,OLDPRTM ;Old 3xxx for PT v3.5-
PrSlide:
LD DE,$1111
LD (IX-12+CrTnSl),E
LD (IX-12+CrTnSl+1),D
LoStep EQU $+1
OLDPRTM:
LD A,$3E
EX AF,AF'
JR Z,NOSIG
EX DE,HL
NOSIG: SBC HL,DE
JP P,SET_STP
CPL
EX AF,AF'
NEG
EX AF,AF'
SET_STP:
LD (IX-12+TSlStp+1),A
EX AF,AF'
LD (IX-12+TSlStp),A
LD (IX-12+COnOff),0
RET
C_GLISS:
SET 2,(IX-12+Flags)
LD A,(BC)
INC BC
LD (IX-12+TnSlDl),A
AND A
JR NZ,GL36
LD A,(Version) ;AlCo PT3.7+
CP 7
SBC A,A
INC A
GL36: LD (IX-12+TSlCnt),A
LD A,(BC)
INC BC
EX AF,AF'
LD A,(BC)
INC BC
JR SET_STP
C_SMPOS:
LD A,(BC)
INC BC
LD (IX-12+PsInSm),A
RET
C_ORPOS:
LD A,(BC)
INC BC
LD (IX-12+PsInOr),A
RET
C_VIBRT:
LD A,(BC)
INC BC
LD (IX-12+OnOffD),A
LD (IX-12+COnOff),A
LD A,(BC)
INC BC
LD (IX-12+OffOnD),A
XOR A
LD (IX-12+TSlCnt),A
LD (IX-12+CrTnSl),A
LD (IX-12+CrTnSl+1),A
RET
C_ENGLS:
LD A,(BC)
INC BC
LD (Env_Del),A
LD (CurEDel),A
LD A,(BC)
INC BC
LD L,A
LD A,(BC)
INC BC
LD H,A
LD (ESldAdd),HL
RET
C_DELAY: LD A,(BC)
INC BC
LD (Delay),A
RET
SETENV: LD (IX-12+Env_En),E
LD (AYREGS+EnvTp),A
LD A,(BC)
INC BC
LD H,A
LD A,(BC)
INC BC
LD L,A
LD (EnvBase),HL
XOR A
LD (IX-12+PsInOr),A
LD (CurEDel),A
LD H,A
LD L,A
LD (CurESld),HL
C_NOP: RET
SETORN: ADD A,A
LD E,A
LD D,0
LD (IX-12+PsInOr),D
OrnPtrs EQU $+1
LD HL,$2121
ADD HL,DE
LD E,(HL)
INC HL
LD D,(HL)
MDADDR2 EQU $+1
LD HL,$2121
ADD HL,DE
LD (IX-12+OrnPtr),L
LD (IX-12+OrnPtr+1),H
RET
SETSAM: ADD A,A
LD E,A
LD D,0
SamPtrs EQU $+1
LD HL,$2121
ADD HL,DE
LD E,(HL)
INC HL
LD D,(HL)
MDADDR1 EQU $+1
LD HL,$2121
ADD HL,DE
LD (IX-12+SamPtr),L
LD (IX-12+SamPtr+1),H
RET
;ALL 16 ADDRESSES TO PROTECT FROM BROKEN PT3 MODULES
SPCCOMS:
DEFW C_NOP
DEFW C_GLISS
DEFW C_PORTM
DEFW C_SMPOS
DEFW C_ORPOS
DEFW C_VIBRT
DEFW C_NOP
DEFW C_NOP
DEFW C_ENGLS
DEFW C_DELAY
DEFW C_NOP
DEFW C_NOP
DEFW C_NOP
DEFW C_NOP
DEFW C_NOP
DEFW C_NOP
CHREGS: XOR A
LD (Ampl),A
BIT 0,(IX+Flags)
PUSH HL
JP Z,CH_EXIT
LD (CSP_+1),SP
LD L,(IX+OrnPtr)
LD H,(IX+OrnPtr+1)
LD SP,HL
POP DE
LD H,A
LD A,(IX+PsInOr)
LD L,A
ADD HL,SP
INC A
;PT2 PT3
OrnCP: INC A ;CP E CP D
JR C,CH_ORPS