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pt3play2.s
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pt3play2.s
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#---------------------------------------------------------------------
# PT3 PLAYER with TS support by KUVO, 02022 CSI
#
# !!! This is a test sample under development !!!
# !!! Some tracks may not play correctly !!!
#
# !!! PT2 format is not supported !!!
#
# BASED ON Universal PT3 player for ZX Spectrum and MSX by S.V.Bulba
#
# BK-0011M version ported for Electronika MS0511 by aberrant_hacker
#
# PLATFORM: Elektronika MS 0511
# SOUND DEVICE: Aberrant Sound Module
# COMPILER: GNU Assembler
#---------------------------------------------------------------------
INTEGRATION_POINTS:
NO_REPEAT_MODE: .word 1 #+034 Play without repeat. Set (not zero) before INIT call.
REPETITION_NUMBER: .word 0 #+036 Number of elapsed repetitions after end of PT3 file
# INIT ----------------------------------------------------------------------{{{
TS_ID:
.ascii "PT3!PT3!02TS"
TS_ID_END:
TS_ID_CHECK:
MOV $4, R5 # MOV #4, R4
10$: # 0:
DEC (R4) # @$PBPADR
CMPB (R0), -(R2) # CMPB -(R0), -(R2)
BNE 1237$ # BNE 1
SOB R5, 10$ # SOB R4, 0
1237$: RETURN # 1: RET
pt3play2.INIT:
CLR TS_PRESENT # CLR TS_PRESENT
# CLR SEL_DEVICE
MOV $PBPADR,R4
MOV $PBP12D,R0
MOV $PPT3.FRAME_NUMBER,(R4) # CLR FRAME_NUMBER
CLR (R0)
MOV $PPT3.END_OF_PT3FILE,(R4) # CLR END_OF_PT3FILE
CLR (R0)
# CLR PT3FILE_MODULE2_ADDR
MOV $PPT3.REPETITION_NUMBER,(R4) # CLR REPETITION_NUMBER
CLR (R0)
MOV $PPT3.PT3FILE_MODULE1_ADDR, (R4) # MOV PT3FILE_MODULE1_ADDR, R1
MOV (R0), R1 # R1 will be used later by INIT_NEXT
MOV R1, PT3FILE_MODULE1_ADDR
MOV $PPT3.PT3FILE_END_ADDR, (R4)
MOV (R0), (R4) # MOV PT3FILE_END_ADDR, R0
MOV $PARAM_DEVICES_AY1, R3 # MOV #PARAM_DEVICES_AY1, R3
# CLR (R3)+
# MOV #100000, (R3)+
.equiv pt3play2.PSG0, .+2
MOV $PSG0, (R3)+ # MOV #AY_1_PORT_AZBK, (R3)+
# TS detect
MOV $TS_ID_END, R2 # MOV #TS_ID_END, R2
CALL TS_ID_CHECK # CALL TS_ID_CHECK
BNE INIT_NEXT # BNE INIT_NEXT
# Skip length of second module
SUB $2, (R4) # SUB #2, R0
CALL TS_ID_CHECK # CALL TS_ID_CHECK
BNE INIT_NEXT # BNE INIT_NEXT
# Get offset to second module
CLR R5 # CLR R5 ;GET OFFSET TO SECOND MODULE
DEC (R4)
BISB (R0), R5 # BISB -(R0), R5
SWAB R5 # SWAB R5
DEC (R4)
BISB (R0), R5 # BISB -(R0), R5
.equiv PT3FILE_MODULE1_ADDR, .+2
ADD $0, R5 # ADD PT3FILE_MODULE1_ADDR, R5 ;GET ADDRESS OF SECOND MODULE
MOV R5,PT3FILE_MODULE2_ADDR
CALL TS_ID_CHECK # CALL TS_ID_CHECK
BNE INIT_NEXT # BNE INIT_NEXT
INC TS_PRESENT # INC TS_PRESENT
# MOV R5, -(SP) ; store PT3FILE_MODULE2_ADDR for now
CALL INIT_NEXT # CALL INIT_NEXT
.equiv PT3FILE_MODULE2_ADDR, .+2
MOV $0, R1 # MOV (SP)+, R1 # restore the PT3FILE_MODULE2_ADDR
MOV $PARAM_DEVICES_AY2, R3 # MOV #PARAM_DEVICES_AY2, R3
# MOV #1, (R3)+
# MOV #40000, (R3)+
.equiv pt3play2.PSG1, .+2
MOV $PSG1, (R3)+ # MOV #AY_2_PORT_AZBK, (R3)+
INIT_NEXT:
# R1 = PT3FILE_MODULEn_ADDR
# R3 = PARAMETERS_AY[1|2]
MOV $PBPADR,R4
MOV $PBP1DT,R0
MOV R3, CUR_PARAMS_ADDR # MOV R3, CUR_PARAMS_ADDR
MOV R1, PARAM_MODULE_ADDRESS(R3) # MOV R1, PARAM_MODULE_ADDRESS(R3)
MOV R1, R5 # MOV R1, R5
MOV R5,(R4)
# +100 (1 byte) значение темпа
ADD $100,(R4)
MOVB (R0), PARAM_DELAY(R3) # MOVB 100.(R5), PARAM_DELAY(R3)
# +201 (?) список позиций (ордер)
# Содержит номера паттернов (0...84), умноженные на 3
ADD $200, R1 # ADD #200., R1
MOV R1, PARAM_CURRENTPOSITION(R3) # MOV R1, PARAM_CURRENTPOSITION(R3)
# +102 (1 byte) song loop (0=зацикливание на начало)
ADD $2,(R4) # MOVB 102.(R5), R2
MOVB (R0), R2
ADD R2, R1 # ADD R2, R1
INC R1 # INC R1
MOV R1, PARAM_LOOPPOSITION(R3) # MOV R1, PARAM_LOOPPOSITION(R3)
# +103 (2 bytes) Psa_chn=смещение от начала модуля до таблицы паттернов.
CLR R1 # CLR R1
ADD $2,(R4) # BISB 104(R5), R1
BISB (R0), R1
SWAB R1 # SWAB R1
DEC (R4) # BISB 103(R5), R1
BISB (R0), R1 # R1: patterns offset
ADD R5, R1 # ADD R5, R1
MOV R1, PARAM_PATTERNSPOINTER(R3) # MOV R1, PARAM_PATTERNSPOINTER(R3)
# +169 (16*2) смещения от начала модуля до орнаментов, начиная с нулевого.
# По два байта на орнамент.
MOV $169, R1 # R1: ornaments offset # MOV #169., R1
ADD R5, R1 # ADD R5, R1
MOV R1, PARAM_ORNAMENTSPOINTERS(R3) # MOV R1, PARAM_ORNAMENTSPOINTERS(R3)
# +105 (32*2) смещения от начала модуля до сэмплов, начиная с нулевого сэмпла.
# По два байта на сэмпл.
MOV $105, R1 # R1: samples offset # MOV #105., R1
ADD R5, R1 # ADD R5, R1
MOV R1, PARAM_SAMPLESPOINTERS(R3) # MOV R1, PARAM_SAMPLESPOINTERS(R3)
#---
MOV $EMPTY_SAM_ORN_TEMPLATE_END,R2
.equiv EMPTY_SAM_ORN_TEMPLATE_SIZE, EMPTY_SAM_ORN_TEMPLATE_END - EMPTY_SAM_ORN_TEMPLATE
MOV $EMPTY_SAM_ORN_TEMPLATE_SIZE, R1
CLR (R4)
create_empty_sam_orn_loop:
DEC (R4)
MOVB -(R2),(R0)
SOB R1,create_empty_sam_orn_loop
MOV (R4),EMPTY_SAM_ORN
#---
PUSH R5 # store PT3FILE_MODULEn_ADDR # MOV R5, -(SP)
#---
MOV $TABLES_PACK, R4 # MOV #TABLES_PACK, R4
MOV $PARAM_TAB_WORK + 98, R5 # MOV #PARAM_TAB_WORK + 98., R5
ADD R3, R5 # ADD R3, R5
MOV $4, R3 # MOV #4, R3
MOV $12, R2 # MOV #12., R2
10$:
MOV (R4)+, R0 # MOV (R4)+, R0
ASL R0 # ASL R0
BR 2$ # BR 2
1$:
CLR R1 # CLR R1
BISB (R4)+, R1 # BISB (R4)+, R1
ADD R1, R0 # ADD R1, R0
ADD R1, R0 # ADD R1, R0
2$: MOV R0, -(R5) # MOV R0, -(R5)
SOB R2, 1$ # SOB R2, 1
MOVB (R4)+, R2 # MOVB (R4)+, R2
INC R4 # INC R4
BIC $1, R4 # BIC #1, R4
SOB R3, 10$ # SOB R3, 10
MOV CUR_PARAMS_ADDR, R5 # MOV CUR_PARAMS_ADDR, R5
MOV $PARAM_VAR0START, R1 # MOV #PARAM_VAR0START, R1
ADD R5, R1 # ADD R5, R1
MOV $PARAM_VAR0END - PARAM_VAR0START, R3 # MOV #PARAM_VAR0END - PARAM_VAR0START, R3
3$:
CLRB (R1)+ # CLRB (R1)+
SOB R3, 3$ # SOB R3, 3
MOVB $1, PARAM_DELAYCOUNTER(R5) # MOVB #1, PARAM_DELAYCOUNTER(R5)
MOV $0xF001, R0 # MOV #0XF001, R0
.equiv EMPTY_SAM_ORN, .+2
MOV $0, R2 # MOV #EMPTY_SAM_ORN, R2
MOV $PARAM_CHANNEL_A, R4 # MOV #PARAM_CHANNEL_A, R4
ADD R5, R4 # ADD R5, R4
# MOV (PC)+, R3
MOV $AY_AMPLITUDEA_TONEA, R3 # .BYTE AY_TONA, AY_AMPLITUDEA
CALL FILL
# MOV (PC)+, R3
MOV $AY_AMPLITUDEB_TONEB, R3 # .BYTE AY_TONB, AY_AMPLITUDEB
CALL FILL
# MOV (PC)+, R3
MOV $AY_AMPLITUDEC_TONEC, R3 # .BYTE AY_TONC, AY_AMPLITUDEC
CALL FILL
MOV $PBPADR,R4
MOV $PBP1DT,R3
POP (R4) # restore PT3FILE_MODULEn_ADDR # MOV (SP)+, R5
# +13 (1) "7" (или "6","5","4", или даже "3" ) - номер подверсии.
ADD $13,(R4)
MOVB (R3), R0 # MOVB 13.(R5), R0
SUB $060, R0 # SUB #60, R0
BLO 4$ # BCS 4
CMPB R0, $10 # CMPB R0, #10.
BLO 5$ # BLO 5
4$: MOV $6, R0 # MOV #6, R0
5$: MOV CUR_PARAMS_ADDR, R2 # MOV CUR_PARAMS_ADDR, R2
MOVB R0, PARAM_VERSION(R2) # MOVB R0, PARAM_VERSION(R2)
PUSH R0 # MOV R0, -(SP)
CMPB R0, $4 # CMPB R0, #4
# +99 (1) номер частотной таблицы:
# 0=Pro Tracker (она же 1625000),
# 1=Sound Tracker,
# 2=1750000 (другое название, не соответствующее содержанию - ASM or PSC),
# 3=RealSound (она же 1625000+, плохая попытка передвинуть табл. 0 под 1.75MHz).
# Табличка занимает 192 байта и содержит значения делителей частоты для 96 нот, начиная
# с C-1 (ДО первой октавы).
# Делитель частоты - значение, помещаемое в соотвующие регистры AY.
# Младшие байты (здесь и ниже, за одним исключением, которое будет указано)
# хранятся первыми.
# Компилятор PT3 (текущие версии PT3 собираются без компилятора) сохраняет таблицу,
# соответствующую модулю, в тело плейера по относительному адресу 512.
# Таблицу громкости он сохраняет в том же теле плейера по относительному адресу 256.
ADD $86,(R4)
MOVB (R3), R0 # MOVB 99.(R5), R0
ROLB R0 # ROLB R0
BIC $0177770, R0 # BICB #177770, R0
NOTE_TABLE_MAKER:
PUSH R1 # MOV R1, -(SP)
MOV $NT_DATA, R1 # MOV #NT_DATA, R1
ADD R0, R1 # ADD R0, R1
ADD R0, R1 # ADD R0, R1
ADD R0, R1 # ADD R0, R1
CLR R2 # CLR R2
BISB (R1)+, R2 # BISB (R1)+, R2
MOV (PC)+, R0 # MOV (PC)+, R0
NOP # NOP
TSTB (R1)+ # TSTB (R1)+
BZE 10$ # BEQ 0
MOV (PC)+, R0 # MOV (PC)+, R0
CLC # CLC
10$: MOV R0, MULTY_SUBR # MOV R0, MULTY_SUBR
CLR R3 # CLR R3
BISB (R1), R3 # BISB (R1), R3
ADD $TABLES ,R3 # ADD #TABLES ,R3
ADD (SP)+, R2 # pops stored R1 # ADD (SP)+, R2
PUSH R3 # MOV R3, -(SP)
MOV $PARAM_NOTE_TAB, R1 # MOV #PARAM_NOTE_TAB, R1
ADD CUR_PARAMS_ADDR, R1 # ADD CUR_PARAMS_ADDR, R1
PUSH R1 # MOV R1, -(SP)
MOV $12, R4 # MOV #12., R4
1$:
MOV (R2)+, R3 # MOV (R2)+, R3
PUSH R1 # MOV R1, -(SP)
MOV $8, R5 # MOV #8., R5
2$:
CLC # CLC
ROR R3 # ROR R3
CALL MULTY_SUBR # CALL MULTY_SUBR
MOV R3, R0 # MOV R3, R0
ADC R0 # ADC R0
MOV R0, (R1) # MOV R0, (R1)
ADD $24, R1 # ADD #24., R1
SOB R5, 2$ # SOB R5, 2
POP R1 # MOV (SP)+, R1
TST (R1)+ # TST (R1)+
SOB R4, 1$ # SOB R4, 1
POP R2 # MOV (SP)+, R2
POP R1 # MOV (SP)+, R1
CMP R1, $TAB_C_OLD_1 # CMP R1, #TAB_C_OLD_1
BNE 3$ # BNE 3
MOV CUR_PARAMS_ADDR, R0 # MOV CUR_PARAMS_ADDR, R0
MOVB $0xFD, PARAM_NOTE_TAB + 056(R0) # MOVB #0XFD, PARAM_NOTE_TAB + 56(R0)
3$: CLR R0 # CLR R0
BISB (R1)+, R0 # BISB (R1)+, R0
BZE 5$ # BEQ 5
CLR R5 # CLR R5
RORB R0 # RORB R0
ROL R5 # ROL R5
ASLB R0 # ASLB R0
ADD R0, R2 # ADD R0, R2
TST R5 # TST R5
BZE 4$ # BEQ 4
SUB $2, (R2) # SUB #2, (R2)
4$: INC (R2) # INC (R2)
SUB R0, R2 # SUB R0, R2
BR 3$ # BR 3
5$: POP R0 # MOV (SP)+, R0
VOL_TABLE_MAKER:
MOV $021, R3 # MOV #21, R3
CLR R1 # CLR R1
CMPB R0, $5 # CMPB R0, #5
MOV (PC)+, R0 # MOV (PC)+, R0
ASLB R0 # ASLB R0
BCC 10$ # BHIS 0
DEC R3 # DEC R3
MOV R3, R1 # MOV R3, R1
MOV (PC)+, R0 # MOV (PC)+, R0
NOP # NOP
10$: MOV R0, MULTY_SUBR # MOV R0, MULTY_SUBR
MOV $PARAM_VOL_TAB, R4 # MOV #PARAM_VOL_TAB, R4
ADD CUR_PARAMS_ADDR, R4 # ADD CUR_PARAMS_ADDR, R4
MOV R4, R5 # MOV R4, R5
MOV $16, R2 # MOV #16., R2
ADD R2, R5 # ADD R2, R5
MOV $256 >> 1, R0 # MOV #256./2, R0
1$:
CLR (R4)+ # CLR (R4)+
SOB R0, 1$ # SOB R0, 1
2$: PUSH R3 # MOV R3, -(SP)
ADD R3, R1 # ADD R3, R1
MOV $0, R3 # MOV #0, R3
SBC R3 # SBC R3
3$: MOVB R3, R0 # MOVB R3, R0
MOV R3, R4 # MOV R3, R4
CLRB R4 # CLRB R4
SWAB R4 # SWAB R4
CALL MULTY_SUBR # CALL MULTY_SUBR
ADCB R4 # ADCB R4
MOVB R4, (R5)+ # MOVB R4, (R5)+
ADD R1, R3 # ADD R1, R3
INC R2 # INC R2
MOV R2, R0 # MOV R2, R0
BIC $0177760, R0 # BIC #177760, R0
BNZ 3$ # BNE 3
POP R3 # MOV (SP)+, R3
CMP R1, $119 # CMP R1, #119.
BNE 4$ # BNE 4
INC R1 # INC R1
4$: TSTB R2 # TSTB R2
BNZ 2$ # BNE 2
JMP REG_OUT # JMP REG_OUT
MULTY_SUBR:
NOP # NOP
RETURN # RET
FILL:
MOV R0, CHP_NOTE_SKIP_COUNTER(R4) # MOV R0, CHP_NOTE_SKIP_COUNTER(R4)
MOV R2, CHP_ADDRESS_IN_PATTERN(R4) # MOV R2, CHP_ADDRESS_IN_PATTERN(R4)
MOV R2, CHP_ORNAMENTPOINTER(R4) # MOV R2, CHP_ORNAMENTPOINTER(R4)
MOV R2, CHP_SAMPLEPOINTER(R4) # MOV R2, CHP_SAMPLEPOINTER(R4)
MOV R3, CHP_TONE_REG(R4) # MOV R3, CHP_TONE_REG(R4)
ADD $CHP, R4 # ADD #CHP, R4
RETURN # RET
# INIT ----------------------------------------------------------------------}}}
pt3play2.PLAY:
MOV $PBPADR,R2
MOV $PBP1DT,R3
MOV $PPT3.FRAME_NUMBER,(R2) # INC FRAME_NUMBER
INC (R3)
MOV $PARAMETERS_AY1, R4 # MOV #PARAMETERS_AY1, R4
.equiv TS_PRESENT, .+2 # TS sign present
TST $0 # TST TS_PRESENT
BZE PLAY_NEXT # BEQ PLAY_NEXT
CALL PLAY_NEXT # CALL PLAY_NEXT
MOV $PARAMETERS_AY2, R4 # MOV #PARAMETERS_AY2, R4
PLAY_NEXT:
# R4: PARAMETERS_AY[1|2]
MOV R4, CUR_PARAMS_ADDR # MOV R4, CUR_PARAMS_ADDR
CLR PARAM_ADDTOENVELOPE(R4) # CLR PARAM_ADDTOENVELOPE(R4)
CLRB PARAM_AYREGS.AY_MIXER(R4) # CLRB PARAM_AYREGS + AY_MIXER(R4)
MOVB $-1, PARAM_AYREGS.AY_ENVELOPETYPE(R4) # MOVB #-1, PARAM_AYREGS + AY_ENVELOPETYPE(R4)
DECB PARAM_DELAYCOUNTER(R4) # DECB PARAM_DELAYCOUNTER(R4)
BNZ 5$ # # BHI 5
MOV $PARAM_CHANNEL_A, R5 # MOV #PARAM_CHANNEL_A, R5
ADD R4, R5 # ADD R4, R5
DECB CHP_NOTE_SKIP_COUNTER(R5) # DECB CHP_NOTE_SKIP_COUNTER(R5)
BNZ 2$ # BNE 2
MOV CHP_ADDRESS_IN_PATTERN(R5), (R2) # MOV CHP_ADDRESS_IN_PATTERN(R5), R3
TSTB (R3) # TSTB (R3)
BNZ 1$ # BNE 1
CLRB PARAM_NOISE_BASE(R4) # CLRB PARAM_NOISE_BASE(R4)
MOV PARAM_CURRENTPOSITION(R4), (R2) # MOV PARAM_CURRENTPOSITION(R4), R0
INC (R2) # INC R0
MOVB (R3), R1 # MOVB (R0), R1
CMPB $0377, R1 # CMPB #377, R1
BNE 10$ # BNE 0
MOV $PPT3.END_OF_PT3FILE,(R2) # INC END_OF_PT3FILE
INC @$PBP12D
TST NO_REPEAT_MODE # TST NO_REPEAT_MODE
BZE 20$ # BEQ 00
INCB PARAM_DELAYCOUNTER(R4) # INCB PARAM_DELAYCOUNTER(R4)
INCB PARAM_CHANNEL_A.CHP_NOTE_SKIP_COUNTER(R4) # INCB PARAM_CHANNEL_A + CHP_NOTE_SKIP_COUNTER(R4)
JMP pt3play2.MUTE # JMP MUTE
20$: MOV PARAM_LOOPPOSITION(R4), (R2) # MOV PARAM_LOOPPOSITION(R4), R0
MOVB (R3), R1 # MOVB (R0), R1
INC REPETITION_NUMBER # INC REPETITION_NUMBER ;Next repeat
10$: MOV (R2), PARAM_CURRENTPOSITION(R4) # MOV R0, PARAM_CURRENTPOSITION(R4)
BIC $0xFF00, R1 # BIC #177400, R1
ASL R1 # ASL R1
ADD PARAM_PATTERNSPOINTER(R4), R1 # ADD PARAM_PATTERNSPOINTER(R4), R1
MOV R1,(R2)
MOV PARAM_MODULE_ADDRESS(R4), R1 # MOV PARAM_MODULE_ADDRESS(R4), R2
CLR R0 # CLR R3
BISB (R3), R0 # BISB (R1)+, R3
INC (R2)
SWAB R0 # SWAB R3
BISB (R3), R0 # BISB (R1)+, R3
INC (R2)
SWAB R0 # SWAB R3
ADD R1, R0 # ADD R2, R3
MOV R0, PARAM_CHANNEL_A.CHP_ADDRESS_IN_PATTERN(R4)
CLR R0 # CLR R0
BISB (R3), R0 # BISB (R1)+, R0
INC (R2)
SWAB R0 # SWAB R0
BISB (R3), R0 # BISB (R1)+, R0
INC (R2)
SWAB R0 # SWAB R0
ADD R1, R0 # ADD R2, R0
MOV R0, PARAM_CHANNEL_B.CHP_ADDRESS_IN_PATTERN(R4) # MOV R0, PARAM_CHANNEL_B + CHP_ADDRESS_IN_PATTERN(R4)
CLR R0 # CLR R0
BISB (R3), R0 # BISB (R1)+, R0
INC (R2)
SWAB R0 # SWAB R0
BISB (R3), R0 # BISB (R1)+, R0
INC (R2)
SWAB R0 # SWAB R0
ADD R1, R0 # ADD R2, R0
MOV R0, PARAM_CHANNEL_C.CHP_ADDRESS_IN_PATTERN(R4) # MOV R0, PARAM_CHANNEL_C + CHP_ADDRESS_IN_PATTERN(R4)
#-------------------------------------------------------------------------------
MOV PARAM_CHANNEL_A.CHP_ADDRESS_IN_PATTERN(R4),(R2)
1$: CALL PATTERN_INTERPR # CALL PATTERN_INTERPR
# R5: PARAM_CHANNEL_A
MOV (R2), CHP_ADDRESS_IN_PATTERN(R5) # MOV R3, CHP_ADDRESS_IN_PATTERN(R5)
2$: ADD $CHP, R5 # ADD #CHP, R5
# R5: PARAM_CHANNEL_B
DECB CHP_NOTE_SKIP_COUNTER(R5) # DECB CHP_NOTE_SKIP_COUNTER(R5)
BNZ 3$ # BNE 3
MOV CHP_ADDRESS_IN_PATTERN(R5), (R2) # MOV CHP_ADDRESS_IN_PATTERN(R5), R3
CALL PATTERN_INTERPR # CALL PATTERN_INTERPR
MOV (R2), CHP_ADDRESS_IN_PATTERN(R5) # MOV R3, CHP_ADDRESS_IN_PATTERN(R5)
3$: ADD $CHP, R5 # ADD #CHP, R5
# R5: PARAM_CHANNEL_C
DECB CHP_NOTE_SKIP_COUNTER(R5) # DECB CHP_NOTE_SKIP_COUNTER(R5)
BNZ 4$ # BNE 4
MOV CHP_ADDRESS_IN_PATTERN(R5), (R2) # MOV CHP_ADDRESS_IN_PATTERN(R5), R3
CALL PATTERN_INTERPR # CALL PATTERN_INTERPR
MOV (R2), CHP_ADDRESS_IN_PATTERN(R5) # MOV R3, CHP_ADDRESS_IN_PATTERN(R5)
4$: MOVB PARAM_DELAY(R4), PARAM_DELAYCOUNTER(R4) # MOVB PARAM_DELAY(R4), PARAM_DELAYCOUNTER(R4)
5$: MOV $PARAM_CHANNEL_A, R5 # MOV #PARAM_CHANNEL_A, R5
ADD R4, R5 # ADD R4, R5
CALL CHANGE_REGS # CALL CHANGE_REGS
CALL CHANGE_REGS # CALL CHANGE_REGS
CALL CHANGE_REGS # CALL CHANGE_REGS
# R1: CUR_PARAMS_ADDR
MOVB PARAM_NOISE_BASE(R1), R0 # MOVB PARAM_NOISE_BASE(R2), R0
ADD PARAM_ADDTONOISE(R1), R0 # ADD PARAM_ADDTONOISE(R2), R0
MOVB R0, PARAM_AYREGS.AY_NOISE(R1) # MOVB R0, PARAM_AYREGS + AY_NOISE(R2)
MOV PARAM_ENVELOPE_BASE(R1), R0 # MOV PARAM_ENVELOPE_BASE(R2), R0
ADD PARAM_ADDTOENVELOPE(R1), R0 # ADD PARAM_ADDTOENVELOPE(R2), R0
ADD PARAM_CUR_ENV_SLIDE(R1), R0 # ADD PARAM_CUR_ENV_SLIDE(R2), R0
MOVB R0, PARAM_AYREGS.AY_ENVELOPE_LSB(R1) # MOVB R0, PARAM_AYREGS + AY_ENVELOPE(R2)
SWAB R0 # SWAB R0
MOVB R0, PARAM_AYREGS.AY_ENVELOPE_MSB(R1) # MOVB R0, PARAM_AYREGS + AY_ENVELOPE + 1(R2)
MOV $PARAM_CUR_ENV_DELAY, R0 # MOV #PARAM_CUR_ENV_DELAY, R0
ADD R1, R0 # ADD R2, R0
TSTB (R0) # TSTB (R0)
BZE REG_OUT # BEQ REG_OUT
DECB (R0) # DECB (R0)
BNZ REG_OUT # BNE REG_OUT
MOVB PARAM_ENV_DELAY(R1), (R0) # MOVB PARAM_ENV_DELAY(R2), (R0)
ADD PARAM_ENV_SLIDE_ADD(R1), PARAM_CUR_ENV_SLIDE(R1) # ADD PARAM_ENV_SLIDE_ADD(R2), PARAM_CUR_ENV_SLIDE(R2)
REG_OUT:
.equiv CUR_PARAMS_ADDR, .+2
MOV $0, R0 # MOV CUR_PARAMS_ADDR, R0
MOV R0, R4 # MOV R0, R4
MOV -(R0), pt3play2.AY_PORT # MOV -(R0), AY_PORT_AZBK
# MOV -(R0), GS_SELECTOR
# MOV -(R0), TS_SELECTOR
ADD $PARAM_AYREGS.AY_ENVELOPETYPE, R4 # ADD #PARAM_AYREGS + AY_ENVELOPETYPE, R4
.equiv pt3play2.AY_PORT, .+2 # MOV (PC)+, R5
MOV $DummyPSG,R5 # AY_PORT_AZBK: .WORD 0
MOV $015, R1 # MOV #15, R1
MOVB (R4), R0 # MOVB (R4), R0
BMI 10$ # BMI 0
MOV R1, (R5) # MOVB R1, (R5)
MOVB R0, (R5) # MOVB R0, 1(R5)
10$: DEC R1 # DEC R1
BMI 1237$ # BMI 1
MOV R1, (R5) # MOVB R1, (R5)
MOVB -(R4), (R5) # MOVB -(R4), 1(R5)
BR 10$ # BR 0
1237$: RETURN # RET
pt3play2.MUTE: #-------------------------------------------------------------{{{
MOV $PARAMETERS_AY1, R4 # MOV #PARAMETERS_AY1, R4
CALL pt3play2.MUTE_NEXT # CALL MUTE_NEXT
MOV $PARAMETERS_AY2, R4 # R4 MOV #PARAMETERS_AY2, R4
pt3play2.MUTE_NEXT:
MOV R4, CUR_PARAMS_ADDR # MOV R4, CUR_PARAMS_ADDR
CLR PARAM_AYREGS.AY_AMPLITUDEA(R4) # CLR PARAM_AYREGS + AY_AMPLITUDEA(R4)
CLRB PARAM_AYREGS.AY_AMPLITUDEC(R4) # CLRB PARAM_AYREGS + AY_AMPLITUDEC(R4)
MOVB $077, PARAM_AYREGS.AY_MIXER(R4) # MOVB #77, PARAM_AYREGS + AY_MIXER(R4)
BR REG_OUT # BR REG_OUT
#----------------------------------------------------------------------------}}}
PD_ORSM:
CLRB CHP_ENVELOPE_ENABLED(R5) # CLRB CHP_ENVELOPE_ENABLED(R5)
CALL SET_ORNAMENT # CALL SET_ORNAMENT
MOVB (R3), R0 # MOVB (R3)+, R0
INC (R2)
BR PD_SAM_ # BR PD_SAM_
PD_SAM:
SUB $0xD0, R0 # SUB #0XD0, R0
ASL R0 # ASL R0
PD_SAM_:
MOV (R2), R1 # store current (R2)
ADD PARAM_SAMPLESPOINTERS(R4), R0 # ADD PARAM_SAMPLESPOINTERS(R4), R0
MOV R0, (R2)
CLR R0 # CLR R1
BISB (R3), R0 # BISB (R0)+, R1
INC (R2)
SWAB R0 # SWAB R1
BISB (R3), R0 # BISB (R0), R1
SWAB R0 # SWAB R1
MOV R1,(R2) # restore (R2)
TST R0 # TST R1
BZE 1$ # BEQ 0
ADD PARAM_MODULE_ADDRESS(R4), R0 # ADD PARAM_MODULE_ADDRESS(R4), R1
MOV R0, CHP_SAMPLEPOINTER(R5) # MOV R1, CHP_SAMPLEPOINTER(R5)
1$: BR PD_LOOP # BR PD_LOOP
PD_VOL:
BIC $0xFFF0, R0 # BIC #0XFFF0, R0
ASL R0 # ASL R0
ASL R0 # ASL R0
ASL R0 # ASL R0
ASL R0 # ASL R0
MOVB R0, CHP_VOLUME(R5) # MOVB R0, CHP_VOLUME(R5)
BR PD_LOOP # BR PD_LOOP
PD_EOFF:
CLRB CHP_ENVELOPE_ENABLED(R5) # CLRB CHP_ENVELOPE_ENABLED(R5)
CLRB CHP_POSITION_IN_ORNAMENT(R5) # CLRB CHP_POSITION_IN_ORNAMENT(R5)
BR PD_LOOP # BR PD_LOOP
PD_SORE:
BIC $0xFFF0, R0 # BIC #0XFFF0, R0
DECB R0 # DECB R0
BNZ PD_ENV # BNE PD_ENV
MOVB (R3), CHP_NUMBER_OF_NOTES_TO_SKIP(R5) # MOVB (R3)+, CHP_NUMBER_OF_NOTES_TO_SKIP(R5)
INC (R2)
BR PD_LOOP # BR PD_LOOP
PD_ENV:
CALL SET_ENVELOPE # CALL SET_ENVELOPE
CLRB CHP_POSITION_IN_ORNAMENT(R5) # CLRB CHP_POSITION_IN_ORNAMENT(R5)
BR PD_LOOP # BR PD_LOOP
PD_ORN:
CALL SET_ORNAMENT # CALL SET_ORNAMENT
BR PD_LOOP # BR PD_LOOP
PD_ESAM:
CLRB CHP_ENVELOPE_ENABLED(R5) # CLRB CHP_ENVELOPE_ENABLED(R5)
BIC $0xFFF0, R0 # BIC #0XFFF0, R0
BZE 1$ # BEQ 0
CALL SET_ENVELOPE # CALL SET_ENVELOPE
1$: CLRB CHP_POSITION_IN_ORNAMENT(R5) # CLRB CHP_POSITION_IN_ORNAMENT(R5)
MOVB (R3), R0 # MOVB (R3)+, R0
INC (R2)
BR PD_SAM_ # BR PD_SAM_
PATTERN_INTERPR:
# was
# IN: R3: PARAM_CHANNEL_[A|B|C].CHP_ADDRESS_IN_PATTERN
# now:
# IN:
# R2: PBPADR
# (R2): PARAM_CHANNEL_[A|B|C].CHP_ADDRESS_IN_PATTERN
# R3: PBP1DT
#
# R4: CUR_PARAMS_ADDR
# R5: CUR_PARAMS_ADDR.PARAM_CHANNEL_A
MOV CHP_NOTE(R5), PARAM_PRNOTE(R4) # MOV CHP_NOTE(R5), PARAM_PRNOTE(R4)
MOV CHP_CURRENT_TON_SLIDING(R5), PARAM_PRSLIDING(R4) # MOV CHP_CURRENT_TON_SLIDING(R5), PARAM_PRSLIDING(R4)
PD_LOOP:
CLR R0 # CLR R0
BISB (R3), R0 # BISB (R3)+, R0
INC (R2)
CMPB R0, $0xF0 # CMPB R0, #0XF0
BHIS PD_ORSM # BHIS PD_ORSM
CMPB R0, $0xD0 # CMPB R0, #0XD0
BEQ PD_FIN # BEQ PD_FIN
BHI PD_SAM # BHI PD_SAM
CMPB R0, $0xC0 # CMPB R0, #0XC0
BEQ PD_REL # BEQ PD_REL
BHI PD_VOL # BHI PD_VOL
CMPB R0, $0xB0 # CMPB R0, #0XB0
BEQ PD_EOFF # BEQ PD_EOFF
BHI PD_SORE # BHI PD_SORE
CMPB R0, $0x50 # CMPB R0, #0X50
BHIS PD_NOTE # BHIS PD_NOTE
CMPB R0, $0x40 # CMPB R0, #0X40
BHIS PD_ORN # BHIS PD_ORN
CMPB R0, $0x20 # CMPB R0, #0X20
BHIS PD_NOIS # BHIS PD_NOIS
CMPB R0, $0x10 # CMPB R0, #0X10
BHIS PD_ESAM # BHIS PD_ESAM
ASL R0 # ASL R0
PUSH SPEC_SUBR(R0) # push RETURN address # MOV SPEC_SUBR(R0), -(SP)
BR PD_LOOP # BR PD_LOOP
PD_NOIS:
BIC $0xFFE0, R0 # BIC #0XFFE0, R0
MOVB R0, PARAM_NOISE_BASE(R4) # MOVB R0, PARAM_NOISE_BASE(R4)
BR PD_LOOP # BR PD_LOOP
PD_REL:
CLRB CHP_ENABLED(R5) # CLRB CHP_ENABLED(R5)
BR PD_RES # BR PD_RES
PD_NOTE:
SUB $0x50, R0 # SUB #0X50, R0
MOV R0, CHP_NOTE(R5) # MOV R0, CHP_NOTE(R5)
MOVB $-1, CHP_ENABLED(R5) # MOVB #-1, CHP_ENABLED(R5)
PD_RES:
MOV R5, R0 # MOV R5, R0
CLR (R0)+ # CLR (R0)+
CLR (R0)+ # CLR (R0)+
CLR (R0)+ # CLR (R0)+
CLR (R0)+ # CLR (R0)+
CLR (R0)+ # CLR (R0)+
CLR (R0) # CLR (R0)
PD_FIN:
MOVB CHP_NUMBER_OF_NOTES_TO_SKIP(R5), CHP_NOTE_SKIP_COUNTER(R5) # MOVB CHP_NUMBER_OF_NOTES_TO_SKIP(R5), CHP_NOTE_SKIP_COUNTER(R5)
RETURN
SUBR_PORTM:
CLRB CHP_SIMPLEGLISS(R5) # CLRB CHP_SIMPLEGLISS(R5)
MOVB (R3), R0 # MOVB (R3)+, R0
INC (R2)
INC (R2) # INC R3
INC (R2) # INC R3
MOVB R0, CHP_TON_SLIDE_DELAY(R5) # MOVB R0, CHP_TON_SLIDE_DELAY(R5)
MOVB R0, CHP_TON_SLIDE_COUNT(R5) # MOVB R0, CHP_TON_SLIDE_COUNT(R5)
MOV CHP_NOTE(R5), R0 # MOV CHP_NOTE(R5), R2
MOV R0, CHP_SLIDE_TO_NOTE(R5) # MOV R2, CHP_SLIDE_TO_NOTE(R5)
ASL R0 # ASL R2
ADD R4, R0 # ADD R4, R2
MOV PARAM_NOTE_TAB(R0), R0 # MOV PARAM_NOTE_TAB(R2), R2
MOV PARAM_PRNOTE(R4), R1 # MOV PARAM_PRNOTE(R4), R1
MOV R1, CHP_NOTE(R5) # MOV R1, CHP_NOTE(R5)
ASL R1 # ASL R1
ADD R4, R1 # ADD R4, R1
MOV PARAM_NOTE_TAB(R1), R1 # MOV PARAM_NOTE_TAB(R1), R1
SUB R1, R0 # SUB R1, R2
MOV R0, CHP_TON_DELTA(R5) # MOV R2, CHP_TON_DELTA(R5)
MOV CHP_CURRENT_TON_SLIDING(R5), R1 # MOV CHP_CURRENT_TON_SLIDING(R5), R1
CMPB PARAM_VERSION(R4), $6 # CMPB PARAM_VERSION(R4), #6
BLO OLDPRTM # BLO OLDPRTM
MOV PARAM_PRSLIDING(R4), R1 # MOV PARAM_PRSLIDING(R4), R1
MOV R1, CHP_CURRENT_TON_SLIDING(R5) # MOV R1, CHP_CURRENT_TON_SLIDING(R5)
OLDPRTM:
CLR R0 # CLR R0
BISB (R3), R0 # BISB (R3)+, R0
INC (R2)
SWAB R0 # SWAB R0
BISB (R3), R0 # BISB (R3)+, R0
INC (R2)
SWAB R0 # SWAB R0
TST R0 # TST R0
BPL 1$ # BPL 0
NEG R0 # NEG R0
1$: CMP CHP_TON_DELTA(R5), R1 # 0: SUB R1, R2
BPL 2$ # BPL 1
NEG R0 # NEG R0
2$: MOV R0, CHP_TON_SLIDE_STEP(R5) # 1: MOV R0, CHP_TON_SLIDE_STEP(R5)
CLRB CHP_CURRENT_ONOFF(R5) # CLRB CHP_CURRENT_ONOFF(R5)
RETURN # RET
SUBR_GLISS:
MOVB (PC), CHP_SIMPLEGLISS(R5) # MOVB (PC), CHP_SIMPLEGLISS(R5)
MOVB (R3), R0 # MOVB (R3)+, R0
INC (R2)
MOVB R0, CHP_TON_SLIDE_DELAY(R5) # MOVB R0, CHP_TON_SLIDE_DELAY(R5)
BNZ GL36 # BNE GL36
CMPB PARAM_VERSION(R4), $7 # CMPB PARAM_VERSION(R4), #7
BLO GL36 # BLO GL36
INCB R0 # INCB R0
GL36: MOVB R0, CHP_TON_SLIDE_COUNT(R5) # MOVB R0, CHP_TON_SLIDE_COUNT(R5)
MOVB (R3), CHP_TON_SLIDE_STEP(R5) # MOVB (R3)+, CHP_TON_SLIDE_STEP(R5)
INC (R2)
MOVB (R3), CHP_TON_SLIDE_STEP + 1(R5) # MOVB (R3)+, CHP_TON_SLIDE_STEP + 1(R5)
INC (R2)
CLRB CHP_CURRENT_ONOFF(R5) # CLRB CHP_CURRENT_ONOFF(R5)
RETURN # RET
SUBR_SMPOS:
MOVB (R3), CHP_POSITION_IN_SAMPLE(R5) # MOVB (R3)+, CHP_POSITION_IN_SAMPLE(R5)
INC (R2)
RETURN # RET
SUBR_ORPOS:
MOVB (R3), CHP_POSITION_IN_ORNAMENT(R5) # MOVB (R3)+, CHP_POSITION_IN_ORNAMENT(R5)
INC (R2)
RETURN # RET
SUBR_VIBRT:
MOVB (R3), CHP_ONOFF_DELAY(R5) # MOVB (R3), CHP_ONOFF_DELAY(R5)
MOVB (R3), CHP_CURRENT_ONOFF(R5) # MOVB (R3)+, CHP_CURRENT_ONOFF(R5)
INC (R2)
MOVB (R3), CHP_OFFON_DELAY(R5) # MOVB (R3)+, CHP_OFFON_DELAY(R5)
INC (R2)
CLRB CHP_TON_SLIDE_COUNT(R5) # CLRB CHP_TON_SLIDE_COUNT(R5)
CLR CHP_CURRENT_TON_SLIDING(R5) # CLR CHP_CURRENT_TON_SLIDING(R5)
RETURN # RET
SUBR_ENGLS:
MOVB (R3), PARAM_ENV_DELAY(R4) # MOVB (R3), PARAM_ENV_DELAY(R4)
MOVB (R3), PARAM_CUR_ENV_DELAY(R4) # MOVB (R3)+, PARAM_CUR_ENV_DELAY(R4)
INC (R2)
MOVB (R3), PARAM_ENV_SLIDE_ADD_LSB(R4) # MOVB (R3)+, PARAM_ENV_SLIDE_ADD(R4)
INC (R2)
MOVB (R3), PARAM_ENV_SLIDE_ADD_MSB(R4) # MOVB (R3)+, PARAM_ENV_SLIDE_ADD + 1(R4)
INC (R2)
RETURN
SUBR_DELAY:
MOVB (R3), PARAM_DELAY(R4) # MOVB (R3)+, PARAM_DELAY(R4)
INC (R2)
RETURN # RET
SET_ENVELOPE:
MOVB $0x10, CHP_ENVELOPE_ENABLED(R5) # MOVB #0X10, CHP_ENVELOPE_ENABLED(R5)
MOVB R0, PARAM_AYREGS.AY_ENVELOPETYPE(R4) # MOVB R0, PARAM_AYREGS + AY_ENVELOPETYPE(R4)
MOVB (R3), PARAM_ENVELOPE_BASE + 1(R4) # MOVB (R3)+, PARAM_ENVELOPE_BASE + 1(R4)
INC (R2)
MOVB (R3), PARAM_ENVELOPE_BASE(R4) # MOVB (R3)+, PARAM_ENVELOPE_BASE(R4)
INC (R2)
CLRB PARAM_CUR_ENV_DELAY(R4) # CLRB PARAM_CUR_ENV_DELAY(R4)
CLR PARAM_CUR_ENV_SLIDE(R4) # CLR PARAM_CUR_ENV_SLIDE(R4)
SUBR_NOP:
RETURN
SET_ORNAMENT:
MOV (R2), R1 # store (R2)
BIC $0xFFF0, R0 # BIC #0XFFF0, R0
ASL R0 # ASL R0
ADD PARAM_ORNAMENTSPOINTERS(R4), R0 # ADD PARAM_ORNAMENTSPOINTERS(R4), R0
MOV R0, (R2)
CLR R0 # CLR R1
BISB (R3), R0 # BISB (R0)+, R1
INC (R2)
SWAB R0 # SWAB R1
BISB (R3), R0 # BISB (R0), R1
SWAB R0 # SWAB R1
TST R0 # TST R1
BNZ 1$ # BNE 0
MOV EMPTY_SAM_ORN, R0 # MOV #EMPTY_SAM_ORN, R1
BR 2$ # BR 1
1$: ADD PARAM_MODULE_ADDRESS(R4), R0 # ADD PARAM_MODULE_ADDRESS(R4), R1
2$: MOV R0, CHP_ORNAMENTPOINTER(R5) # MOV R1, CHP_ORNAMENTPOINTER(R5)
CLRB CHP_POSITION_IN_ORNAMENT(R5) # CLRB CHP_POSITION_IN_ORNAMENT(R5)
MOV R1, (R2) # restore (R2)
RETURN # RET
SPEC_SUBR: .word SUBR_NOP
.word SUBR_GLISS
.word SUBR_PORTM
.word SUBR_SMPOS
.word SUBR_ORPOS
.word SUBR_VIBRT
.word SUBR_NOP
.word SUBR_NOP
.word SUBR_ENGLS
.word SUBR_DELAY
.word SUBR_NOP
.word SUBR_NOP
.word SUBR_NOP
.word SUBR_NOP
.word SUBR_NOP
.word SUBR_NOP
CHANGE_REGS:
# IN: R2: PBPADR
# R3: PBP1DT
# R5: CUR_PARAMS_ADDR.PARAM_CHANNEL_[A|B|C]
#
# OUT: R1: CUR_PARAMS_ADDR
# R5: CUR_PARAMS_ADDR.PARAM_CHANNEL_[B|C|x]
# CORRUPTS: R0, R3, R4
CLR ampl_reg # CLR R1
TSTB CHP_ENABLED(R5) # TSTB CHP_ENABLED(R5)
BNZ CHANGE_REGS_NEXT # BNE CHANGE_REGS_NEXT
CHANGE_REGS_EXIT:
MOVB CHP_AMPL_REG(R5), R0 # MOVB CHP_AMPL_REG(R5), R0
MOV CUR_PARAMS_ADDR, R1 # MOV CUR_PARAMS_ADDR, R2
ADD R1, R0 # ADD R2, R0
.equiv ampl_reg, .+2
MOVB $0, PARAM_AYREGS(R0) # MOVB R1, PARAM_AYREGS(R0)
ASRB PARAM_AYREGS.AY_MIXER(R1) # ASRB PARAM_AYREGS + AY_MIXER(R2)
TSTB CHP_CURRENT_ONOFF(R5) # TSTB CHP_CURRENT_ONOFF(R5)
BZE 2$ # BEQ 1
DECB CHP_CURRENT_ONOFF(R5) # DECB CHP_CURRENT_ONOFF(R5)
BNZ 2$ # BNE 1
MOVB CHP_ONOFF_DELAY(R5), R0 # MOVB CHP_ONOFF_DELAY(R5), R0
COMB CHP_ENABLED(R5) # COMB CHP_ENABLED(R5)
BNZ 1$ # BNE 0
MOVB CHP_OFFON_DELAY(R5), R0 # MOVB CHP_OFFON_DELAY(R5), R0
1$: MOVB R0, CHP_CURRENT_ONOFF(R5) # 0: MOVB R0, CHP_CURRENT_ONOFF(R5)
2$: ADD $CHP, R5 # 1: ADD #CHP, R5
RETURN # RET
CHANGE_REGS_NEXT:
MOV CHP_ORNAMENTPOINTER(R5), (R2) # MOV CHP_ORNAMENTPOINTER(R5), R1
MOVB (R3), R4 # MOVB (R1)+, R4
INC (R2)
# R3 <-> R1
MOVB (R3), R1 # MOVB (R1)+, R3
INC (R2)
MOVB CHP_POSITION_IN_ORNAMENT(R5), R0 # MOVB CHP_POSITION_IN_ORNAMENT(R5), R0
ADD R0, (R2) # ADD R0, R1
INCB R0 # INCB R0
CMPB R0, R1 # CMPB R0, R3
BLO 100$ # BLO 0
MOVB R4, R0 # MOVB R4, R0
100$: MOVB R0, CHP_POSITION_IN_ORNAMENT(R5) # 0: MOVB R0, CHP_POSITION_IN_ORNAMENT(R5)
MOV CHP_NOTE(R5), R0 # MOV CHP_NOTE(R5), R0
MOVB (R3), R1 # MOVB (R1), R1
ADD R1, R0 # ADD R1, R0
BPL 1$ # BPL 1
CLR R0 # CLR R0
1$: CMP R0, $96 # 1: CMP R0, #96.
BLO 2$ # BLO 2
MOV $95, R0 # MOV #95., R0
2$: ASL R0 # 2: ASL R0
PUSH R0 # note table offset # MOV R0, -(SP)
MOV CHP_SAMPLEPOINTER(R5), (R2) # MOV CHP_SAMPLEPOINTER(R5), R1
MOVB (R3), R4 # MOVB (R1)+, R4
INC (R2)
# R3 <-> R1
MOVB (R3), R1 # MOVB (R1)+, R3
INC (R2)
MOVB CHP_POSITION_IN_SAMPLE(R5), R0 # MOV CHP_POSITION_IN_SAMPLE(R5), R1
ADD R0, (R2) # ADD R0, R1
ADD R0, (R2) # ADD R0, R1
ADD R0, (R2) # ADD R0, R1
ADD R0, (R2) # ADD R0, R1
INCB R0 # INCB R0
CMPB R0, R1 # CMPB R0, R3
BLO 3$ # BLO 3
MOVB R4, R0 # MOVB R4, R0
3$: MOVB R0, CHP_POSITION_IN_SAMPLE(R5) # 3: MOVB R0, CHP_POSITION_IN_SAMPLE(R5)
# R3 <-> R1
MOVB (R3), R1 # MOVB (R1)+, R3
INC (R2)
MOVB (R3), R4 # MOVB (R1)+, R4
INC (R2)
CLR R0 # CLR R2
BISB (R3), R0 # BISB (R1)+, R2
INC (R2)
SWAB R0 # SWAB R2
BISB (R3), R0 # BISB (R1)+, R2
INC (R2)
SWAB R0 # SWAB R2
ADD CHP_TON_ACCUMULATOR(R5), R0 # ADD CHP_TON_ACCUMULATOR(R5), R2
BIT $0x40, R4 # BIT #0X40, R4
BZE 4$ # BEQ 4
MOV R0, CHP_TON_ACCUMULATOR(R5) # MOV R2, CHP_TON_ACCUMULATOR(R5)
# store R1 (former R3) to address register
4$: MOV R1,(R2) # 4: MOV (SP)+, R1
POP R1 # restore note table offset
ADD CUR_PARAMS_ADDR, R1 # ADD CUR_PARAMS_ADDR, R1
ADD PARAM_NOTE_TAB(R1), R0 # ADD PARAM_NOTE_TAB(R1), R2
MOV CHP_CURRENT_TON_SLIDING(R5), R1 # MOV CHP_CURRENT_TON_SLIDING(R5), R1
ADD R1, R0 # ADD R1, R2
BIC $0xF000, R0 # BIC $0xF000, R2
PUSH R0 # PUSH 'R2' ↑
MOVB CHP_TONE_REG(R5), R0 # MOVB CHP_TONE_REG(R5), R0
ADD CUR_PARAMS_ADDR, R0 # ADD CUR_PARAMS_ADDR, R0
POP PARAM_AYREGS(R0) # MOV R2, PARAM_AYREGS(R0)
TSTB CHP_TON_SLIDE_COUNT(R5) # TSTB CHP_TON_SLIDE_COUNT(R5)
BZE 7$ # BEQ 7