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vasm.s
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vasm.s
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; vasm specific code (mostly macros)
if _VASM_=1
macro clrx dst
if PC_REL_CODE
clr.\0 \1-PLY_AKYst_Init(a4)
else
clr.\0 \1
endif
endm
macro tstx dst
if PC_REL_CODE
tst.\0 \1-PLY_AKYst_Init(a4)
else
tst.\0 \1
endif
endm
macro movex src,dst
if PC_REL_CODE
move.\0 \1,\2-PLY_AKYst_Init(a4)
else
move.\0 \1,\2
endif
endm
macro dcbx
dc.b \1
even
endm
macro parse_events
;########################################################
;## Parse tune events
if USE_EVENTS
if PC_REL_CODE
movem.l d0/a0/a4,-(sp)
lea PLY_AKYst_Init(pc),a4 ;base pointer for PC relative stores
else
movem.l d0/a0,-(sp)
endif
clrx.b event_flag
.event_do_count:
move.w event_counter(pc),d0
subq #1,d0
bne.s .nohit
.event_read_val:
; time to read value
move.l events_pos(pc),a0
addq #2,a0
move.w (a0)+,d0
movex.b d0,event_byte
movex.b #1,event_flag ; there's a new event value to fetch
move.w (a0),d0
bne.s .noloopback
; loopback
addq #2,a0
move.l (a0),a0
movex.l a0,events_pos
movex.w (a0),event_counter
bra.s .event_do_count
.noloopback:
movex.l a0,events_pos
.nohit:
movex.w d0,event_counter
;done
if PC_REL_CODE
movem.l (sp)+,d0/a0/a4
else
movem.l (sp)+,d0/a0
endif
endif ; .if USE_EVENTS
if USE_SID_EVENTS
if PC_REL_CODE
movem.l d0/d1/a4,-(sp)
lea PLY_AKYst_Init(pc),a4 ;base pointer for PC relative stores
else
movem.l d0-d1,-(sp)
endif
tstx.b event_flag
beq.s .no_event
move.b event_byte(pc),d0
move.b d0,d1
and.b #$f0,d1
cmp.b #$f0,d1
bne.s .no_sid_event
move.b d0,d1
and.b #EVENT_CHANNEL_A_MASK,d1
movex.b d1,chan_a_sid_on
move.b d0,d1
and.b #EVENT_CHANNEL_B_MASK,d1
movex.b d1,chan_b_sid_on
move.b d0,d1
and.b #EVENT_CHANNEL_C_MASK,d1
movex.b d1,chan_c_sid_on
.no_sid_event:
.no_event:
if PC_REL_CODE
movem.l (sp)+,d0/d1/a4
else
movem.l (sp)+,d0-d1
endif
endif ; .if USE_SID_EVENTS
;## Parse tune events
;########################################################
endm
macro readregs volume,frequency,subroutine
;Generic code interpreting the RegisterBlock
;IN: a1 = First byte.
; Carry = 0 = initial state, 1 = non-initial state.
;----------------------------------------------------------------
PLY_AKYst_ReadRegisterBlock\@:
;Gets the first byte of the line. What type? Jump to the matching code thanks to the zero flag.
PLY_AKYst_RRB_BranchOnNonInitailState\@:
bne PLY_AKYst_RRB_NonInitialState\@
; Code from the bcs and above copied here so nothing will screw with the zero flag
move.b (a1)+,d1
move.b d1,d2
and.b #%00000011,d2
add.b d2,d2
lsr.b #2,d1
ext.w d2
lea PLY_AKYst_IS_JPTable\@(pc),a5
add.w d2,a5
move.w (a5),a5
jmp PLY_AKYst_IS_JPTable\@(pc,a5.w)
PLY_AKYst_IS_JPTable\@:
dc.w PLY_AKYst_RRB_IS_NoSoftwareNoHardware\@-PLY_AKYst_IS_JPTable\@
dc.w PLY_AKYst_RRB_IS_SoftwareOnly\@-PLY_AKYst_IS_JPTable\@
dc.w PLY_AKYst_RRB_IS_HardwareOnly\@-PLY_AKYst_IS_JPTable\@
dc.w PLY_AKYst_RRB_IS_SoftwareAndHardware\@-PLY_AKYst_IS_JPTable\@
;Generic code interpreting the RegisterBlock - Initial state.
;----------------------------------------------------------------
;IN: a1 = Points after the first byte.
; d3 = Register 7. All sounds are open (0) by default, all noises closed (1). The code must put ONLY bit 2 and 5 for sound and noise respectively. NOT any other bits!
; d4 = f680
; d7 (low byte) = Volume register.
; d7 (high byte) = LSB frequency register.
;OUT: a1 MUST point after the structure.
; d3 = updated (ONLY bit 2 and 5).
; d7 (low byte) = Volume register increased of 1 (*** IMPORTANT! The code MUST increase it, even if not using it! ***)
; d7 (high byte) = LSB frequency register, increased of 2 (see above).
PLY_AKYst_RRB_IS_NoSoftwareNoHardware\@:
;No software no hardware.
lsr.b #1,d1 ;Noise?
bcs.s PLY_AKYst_RRB_NIS_NoSoftwareNoHardware_ReadNoise\@
bra.s PLY_AKYst_RRB_NIS_NoSoftwareNoHardware_ReadNoise_End\@
PLY_AKYst_RRB_NIS_NoSoftwareNoHardware_ReadNoise\@:
;There is a noise. Reads it.
movex.b (a1)+,PLY_AKYst_PsgRegister6
;Opens the noise channel.
bclr #PLY_AKYst_RRB_NoiseChannelBit,d4
PLY_AKYst_RRB_NIS_NoSoftwareNoHardware_ReadNoise_End\@:
PLY_AKYst_RRB_NIS_NoSoftwareNoHardware_ReadVolume\@:
;The volume is now in b0-b3.
if \3
if !(SID_VOICES|DUMP_SONG)
move.b d7,(a2)
move.b d1,(a3)
else
move.w d7,d0
ext.w d0
add.w d0,d0
add.w d0,d0
move.b d1,(a3,d0.w)
endif
add.w #(2<<8)+1,d7 ;Increases the volume register (low byte) and frequency register (high byte).
;Closes the sound channel.
bset #PLY_AKYst_RRB_SoundChannelBit,d3
rts
else
if !(SID_VOICES|DUMP_SONG)
move.b #\volume,(a2)
move.b d1,(a3)
else
move.b d1,4*\volume(a3)
endif
;Closes the sound channel.
bset #PLY_AKYst_RRB_SoundChannelBit,d3
bra readregs_out\@
endif
;---------------------
PLY_AKYst_RRB_IS_HardwareOnly\@:
;Retrig?
lsr.b #1,d1
bcs.s PLY_AKYst_RRB_IS_HO_Retrig\@
bra.s PLY_AKYst_RRB_IS_HO_AfterRetrig\@
PLY_AKYst_RRB_IS_HO_Retrig\@:
bset #7,d1 ;A value to make sure the retrig is performed, yet A can still be use.
movex.b d1,PLY_AKYst_PsgRegister13_Retrig
PLY_AKYst_RRB_IS_HO_AfterRetrig\@:
;Noise?
lsr.b #1,d1
bcs.s PLY_AKYst_RRB_IS_HO_Noise\@
bra.s PLY_AKYst_RRB_IS_HO_AfterNoise\@
PLY_AKYst_RRB_IS_HO_Noise\@: ;Reads the noise.
movex.b (a1)+,PLY_AKYst_PsgRegister6
;Opens the noise channel.
bclr #PLY_AKYst_RRB_NoiseChannelBit,d3
PLY_AKYst_RRB_IS_HO_AfterNoise\@:
;The envelope.
and.b #%1111,d1
movex.b d1,PLY_AKYst_PsgRegister13
;Copies the hardware period.
movex.b (a1)+,PLY_AKYst_PsgRegister11
movex.b (a1)+,PLY_AKYst_PsgRegister11+1
;Closes the sound channel.
bset #PLY_AKYst_RRB_SoundChannelBit,d3
if \3
if !(SID_VOICES|DUMP_SONG)
move.b d7,(a2)
move.b d4,(a3) ;(volume to 16).
else
move.w d7,d0
ext.w d0
add.w d0,d0
add.w d0,d0
move.b d4,(a3,d0.w)
endif
add.w #$201,d7 ;Increases the volume register (low byte), and frequency register (high byte - mandatory!).
rts
else
if !(SID_VOICES|DUMP_SONG)
move.b #\volume,(a2)
move.b d4,(a3) ;(volume to 16).
else
move.b d4,4*\volume(a3)
endif
bra readregs_out\@
endif
;---------------------
PLY_AKYst_RRB_IS_SoftwareOnly\@:
;Software only. Structure: 0vvvvntt.
;Noise?
lsr.b #1,d1
bcs.s PLY_AKYst_RRB_IS_SoftwareOnly_Noise\@
bra.s PLY_AKYst_RRB_IS_SoftwareOnly_AfterNoise\@
PLY_AKYst_RRB_IS_SoftwareOnly_Noise\@:
;Noise. Reads it.
movex.b (a1)+,PLY_AKYst_PsgRegister6
;Opens the noise channel.
bclr #PLY_AKYst_RRB_NoiseChannelBit,d3
PLY_AKYst_RRB_IS_SoftwareOnly_AfterNoise\@:
;Reads the volume (now b0-b3).
;Note: we do NOT peform a "and %1111" because we know the bit 7 of the original byte is 0, so the bit 4 is currently 0. Else the hardware volume would be on!
if \3
if !(SID_VOICES|DUMP_SONG)
move.b d7,(a2)
move.b d1,(a3)
else
move.w d7,d0
ext.w d0
add.w d0,d0
add.w d0,d0
move.b d1,(a3,d0.w)
endif
addq.w #1,d7 ;Increases the volume register.
else
if !(SID_VOICES|DUMP_SONG)
move.b #\volume,(a2)
move.b d1,(a3)
else
move.b d1,4*\volume(a3)
endif
endif
;Reads the software period.
if \3
if !(SID_VOICES|DUMP_SONG)
move.w d7,(a2)
move.b (a1)+,(a3)
else
move.w d7,d0
lsr.w #8,d0
add.w d0,d0
add.w d0,d0
move.b (a1)+,(a3,d0.w)
endif
add.w #1<<8,d7 ;Increases the frequency register.
else
if !(SID_VOICES|DUMP_SONG)
move.b #\frequency,(a2)
move.b (a1)+,(a3)
else
move.b (a1)+,4*\frequency(a3)
endif
endif
if \3
if !(SID_VOICES|DUMP_SONG)
move.w d7,(a2)
move.b (a1)+,(a3)
else
move.w d7,d0
lsr.w #8,d0
add.w d0,d0
add.w d0,d0
move.b (a1)+,(a3,d0.w)
endif
add.w #1<<8,d7 ;Increases the frequency register.
rts
else
if !(SID_VOICES|DUMP_SONG)
move.b #\frequency+1,(a2)
move.b (a1)+,(a3)
else
move.b (a1)+,4*(\frequency+1)(a3)
endif
bra readregs_out\@
endif
;---------------------
PLY_AKYst_RRB_IS_SoftwareAndHardware\@:
;Retrig?
lsr.b #1,d1
bcs.s PLY_AKYst_RRB_IS_SAH_Retrig\@
bra.s PLY_AKYst_RRB_IS_SAH_AfterRetrig\@
PLY_AKYst_RRB_IS_SAH_Retrig\@:
bset #7,d1 ;A value to make sure the retrig is performed, yet d1 can still be use.
movex.b d1,PLY_AKYst_PsgRegister13_Retrig
PLY_AKYst_RRB_IS_SAH_AfterRetrig\@:
;Noise?
lsr.b #1,d1
bcs.s PLY_AKYst_RRB_IS_SAH_Noise\@
bra.s PLY_AKYst_RRB_IS_SAH_AfterNoise\@
PLY_AKYst_RRB_IS_SAH_Noise\@:
;Reads the noise.
movex.b (a1)+,PLY_AKYst_PsgRegister6
;Opens the noise channel.
bclr #PLY_AKYst_RRB_NoiseChannelBit,d3
PLY_AKYst_RRB_IS_SAH_AfterNoise\@:
;The envelope.
and.b #%1111,d1
movex.b d1,PLY_AKYst_PsgRegister13
;Reads the software period.
if \3
if !(SID_VOICES|DUMP_SONG)
move.w d7,(a2)
move.b (a1)+,(a3)
else
move.w d7,d0
lsr.w #8,d0
add.w d0,d0
add.w d0,d0
move.b (a1)+,(a3,d0.w)
endif
add.w #1<<8,d7 ;Increases the frequency register.
else
if !(SID_VOICES|DUMP_SONG)
move.b #\frequency,(a2)
move.b (a1)+,(a3)
else
move.b (a1)+,4*\frequency(a3)
endif
endif
if \3
if !(SID_VOICES|DUMP_SONG)
move.w d7,(a2)
move.b (a1)+,(a3)
else
move.w d7,d0
lsr.w #8,d0
add.w d0,d0
add.w d0,d0
move.b (a1)+,(a3,d0.w)
endif
add.w #1<<8,d7 ;Increases the frequency register.
else
if !(SID_VOICES|DUMP_SONG)
move.b #\frequency+1,(a2)
move.b (a1)+,(a3)
else
move.b (a1)+,4*(\frequency+1)(a3)
endif
endif
if \3
if !(SID_VOICES|DUMP_SONG)
move.b d7,(a2)
move.b d4,(a3) ;(volume to 16).
else
move.w d7,d0
ext.w d0
add.w d0,d0
add.w d0,d0
move.b d4,(a3,d0.w)
endif
addq.w #1,d7 ;Increases the volume register.
;Copies the hardware period.
movex.b (a1)+,PLY_AKYst_PsgRegister11
movex.b (a1)+,PLY_AKYst_PsgRegister11+1
rts
else
if !(SID_VOICES|DUMP_SONG)
move.b #\volume,(a2)
move.b d4,(a3) ;(volume to 16).
else
move.b d4,4*\volume(a3)
endif
;Copies the hardware period.
movex.b (a1)+,PLY_AKYst_PsgRegister11
movex.b (a1)+,PLY_AKYst_PsgRegister11+1
bra readregs_out\@
endif
;Generic code interpreting the RegisterBlock - Non initial state. See comment about the Initial state for the registers ins/outs.
;----------------------------------------------------------------
PLY_AKYst_RRB_NonInitialState\@:
; Code from the start of PLY_AKYst_ReadRegisterBlock copied here so nothing will screw with the zero flag
move.b (a1)+,d1
move.b d1,d2
and.b #%00001111,d2 ;Keeps 4 bits to be able to detect the loop. (%1000)
add.b d2,d2
lsr.b #2,d1
ext.w d2
lea PLY_AKYst_NIS_JPTable\@(pc),a5
add.w PLY_AKYst_NIS_JPTable\@(pc,d2.w),a5
jmp (a5)
PLY_AKYst_NIS_JPTable\@:
dc.w PLY_AKYst_RRB_NIS_NoSoftwareNoHardware\@-PLY_AKYst_NIS_JPTable\@ ;%0000
dc.w PLY_AKYst_RRB_NIS_SoftwareOnly\@-PLY_AKYst_NIS_JPTable\@ ;%0001
dc.w PLY_AKYst_RRB_NIS_HardwareOnly\@-PLY_AKYst_NIS_JPTable\@ ;%0010
dc.w PLY_AKYst_RRB_NIS_SoftwareAndHardware\@-PLY_AKYst_NIS_JPTable\@ ;%0011
dc.w PLY_AKYst_RRB_NIS_NoSoftwareNoHardware\@-PLY_AKYst_NIS_JPTable\@ ;%0100
dc.w PLY_AKYst_RRB_NIS_SoftwareOnly\@-PLY_AKYst_NIS_JPTable\@ ;%0101
dc.w PLY_AKYst_RRB_NIS_HardwareOnly\@-PLY_AKYst_NIS_JPTable\@ ;%0110
dc.w PLY_AKYst_RRB_NIS_SoftwareAndHardware\@-PLY_AKYst_NIS_JPTable\@ ;%0111
dc.w PLY_AKYst_RRB_NIS_ManageLoop\@-PLY_AKYst_NIS_JPTable\@ ;%1000. Loop!
dc.w PLY_AKYst_RRB_NIS_SoftwareOnly\@-PLY_AKYst_NIS_JPTable\@ ;%1001
dc.w PLY_AKYst_RRB_NIS_HardwareOnly\@-PLY_AKYst_NIS_JPTable\@ ;%1010
dc.w PLY_AKYst_RRB_NIS_SoftwareAndHardware\@-PLY_AKYst_NIS_JPTable\@ ;%1011
dc.w PLY_AKYst_RRB_NIS_NoSoftwareNoHardware\@-PLY_AKYst_NIS_JPTable\@ ;%1100
dc.w PLY_AKYst_RRB_NIS_SoftwareOnly\@-PLY_AKYst_NIS_JPTable\@ ;%1101
dc.w PLY_AKYst_RRB_NIS_HardwareOnly\@-PLY_AKYst_NIS_JPTable\@ ;%1110
dc.w PLY_AKYst_RRB_NIS_SoftwareAndHardware\@-PLY_AKYst_NIS_JPTable\@ ;%1111
PLY_AKYst_RRB_NIS_ManageLoop\@:
;Loops. Reads the next pointer to this RegisterBlock.
;Check if address is odd, and make it even if so
;Auto-even address. Not the best thing we could do performance wise but it'll do for now
move.l a1,d1
addq.l #1,d1
bclr #0,d1
move.l d1,a1
move.w (a1),a1
lea (a0,a1.w),a1
;Makes another iteration to read the new data.
;Since we KNOW it is not an initial state (because no jump goes to an initial state), we can directly go to the right branching.
;Reads the first byte.
move.b (a1)+,d1
;Reads the next NIS state. We know there won't be any loop.
move.b d1,d2 ;d1 must be saved!
and.b #%00000011,d2
add.b d2,d2
lsr.b #2,d1
ext.w d2
lea PLY_AKYst_NIS_JPTable_NoLoop\@(pc),a5
add.w d2,a5
move.w (a5),a5
jmp PLY_AKYst_NIS_JPTable_NoLoop\@(pc,a5.w)
;This table jumps at each state, but AFTER the loop compensation.
PLY_AKYst_NIS_JPTable_NoLoop\@:
dc.w PLY_AKYst_RRB_NIS_NoSoftwareNoHardware_Loop\@-PLY_AKYst_NIS_JPTable_NoLoop\@ ;%00
dc.w PLY_AKYst_RRB_NIS_SoftwareOnly_Loop\@-PLY_AKYst_NIS_JPTable_NoLoop\@ ;%01
dc.w PLY_AKYst_RRB_NIS_HardwareOnly_Loop\@-PLY_AKYst_NIS_JPTable_NoLoop\@ ;%10
dc.w PLY_AKYst_RRB_NIS_SoftwareAndHardware_Loop\@-PLY_AKYst_NIS_JPTable_NoLoop\@ ;%11
PLY_AKYst_RRB_NIS_NoSoftwareNoHardware\@:
PLY_AKYst_RRB_NIS_NoSoftwareNoHardware_Loop\@:
;No software, no hardware.
;NO NEED to test the loop! It has been tested before. We can optimize from the original code.
move.b d1,d2 ;Used below.
;Closes the sound channel.
bset #PLY_AKYst_RRB_SoundChannelBit,d3
;Volume? bit 2 - 2.
lsr.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_Volume\@
bra.s PLY_AKYst_RRB_NIS_AfterVolume\@
PLY_AKYst_RRB_NIS_Volume\@:
and.b #%1111,d1
if \3
if !(SID_VOICES|DUMP_SONG)
move.b d7,(a2)
move.b d1,(a3)
else
move.w d7,d0
ext.w d0
add.w d0,d0
add.w d0,d0
move.b d1,(a3,d0.w)
endif
else
if !(SID_VOICES|DUMP_SONG)
move.b #\volume,(a2)
move.b d1,(a3)
else
move.b d1,4*\volume(a3)
endif
endif
PLY_AKYst_RRB_NIS_AfterVolume\@:
if \3
add.w #$201,d7 ;Next volume register (low byte) and frequency registers (high byte)
endif
;Noise? Was on bit 7, but there has been two shifts. We can't use d1, it may have been modified by the volume AND.
btst #7-2,d2
bne.s PLY_AKYst_RRB_NIS_Noise\@
if \3
rts
else
bra readregs_out\@
endif
PLY_AKYst_RRB_NIS_Noise\@:
;Noise.
movex.b (a1)+,PLY_AKYst_PsgRegister6
;Opens the noise channel.
bclr #PLY_AKYst_RRB_NoiseChannelBit,d3
if \3
rts
else
bra readregs_out\@
endif
;---------------------
PLY_AKYst_RRB_NIS_SoftwareOnly\@:
PLY_AKYst_RRB_NIS_SoftwareOnly_Loop\@:
;Software only. Structure: mspnoise lsp v v v v (0 1).
move.b d1,d2
;Gets the volume (already shifted).
and.b #%1111,d1
if \3
if !(SID_VOICES|DUMP_SONG)
move.b d7,(a2)
move.b d1,(a3)
else
move.w d7,d0
ext.w d0
add.w d0,d0
add.w d0,d0
move.b d1,(a3,d0.w)
endif
addq.w #1,d7 ;Increases the volume register.
else
if !(SID_VOICES|DUMP_SONG)
move.b #\volume,(a2)
move.b d1,(a3)
else
move.b d1,4*\volume(a3)
endif
endif
;LSP? (Least Significant byte of Period). Was bit 6, but now shifted.
btst #6-2,d2
bne.s PLY_AKYst_RRB_NIS_SoftwareOnly_LSP\@
bra.s PLY_AKYst_RRB_NIS_SoftwareOnly_AfterLSP\@
PLY_AKYst_RRB_NIS_SoftwareOnly_LSP\@:
if \3
if !(SID_VOICES|DUMP_SONG)
move.w d7,(a2)
move.b (a1)+,(a3)
else
move.w d7,d0
lsr.w #8,d0
add.w d0,d0
add.w d0,d0
move.b (a1)+,(a3,d0.w)
endif
;d7 high byte not incremented on purpose.
else
if !(SID_VOICES|DUMP_SONG)
move.b #\frequency,(a2)
move.b (a1)+,(a3)
else
move.b (a1)+,4*\frequency(a3)
endif
endif
PLY_AKYst_RRB_NIS_SoftwareOnly_AfterLSP\@:
;MSP AND/OR (Noise and/or new Noise)? (Most Significant byte of Period).
btst #7-2,d2
bne.s PLY_AKYst_RRB_NIS_SoftwareOnly_MSPAndMaybeNoise\@
if \3
add.w #2<<8,d7
rts
else
bra readregs_out\@
endif
PLY_AKYst_RRB_NIS_SoftwareOnly_MSPAndMaybeNoise\@:
;MSP and noise?, in the next byte. nipppp (n = newNoise? i = isNoise? p = MSB period).
move.b (a1)+,d1 ;Useless bits at the end, not a problem.
;Sends the MSB software frequency.
if \3
add.w #1<<8,d7 ;Was not increased before.
if !(SID_VOICES|DUMP_SONG)
move.w d7,(a2)
move.b d1,(a3)
else
move.w d7,d0
lsr.w #8,d0
add.w d0,d0
add.w d0,d0
move.b d1,(a3,d0.w)
endif
add.w #1<<8,d7 ;Increases the frequency register.
else
if !(SID_VOICES|DUMP_SONG)
move.b #\frequency+1,(a2)
move.b d1,(a3)
else
move.b d1,4*(\frequency+1)(a3)
endif
endif
rol.b #1,d1 ;Carry is isNoise?
bcs.s PLY_AKYst_RRB_NIS_SoftwareOnly_NoisePresent\@
if \3
rts
else
bra readregs_out\@
endif
PLY_AKYst_RRB_NIS_SoftwareOnly_NoisePresent\@:
;Opens the noise channel.
bclr #PLY_AKYst_RRB_NoiseChannelBit,d3
;Is there a new noise value? If yes, gets the noise.
rol.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_SoftwareOnly_Noise\@
if \3
rts
else
bra readregs_out\@
endif
PLY_AKYst_RRB_NIS_SoftwareOnly_Noise\@:
;Gets the noise.
movex.b (a1)+,PLY_AKYst_PsgRegister6
if \3
rts
else
bra readregs_out\@
endif
;---------------------
PLY_AKYst_RRB_NIS_HardwareOnly\@:
PLY_AKYst_RRB_NIS_HardwareOnly_Loop\@:
;Gets the envelope (initially on b2-b4, but currently on b0-b2). It is on 3 bits, must be encoded on 4. Bit 0 must be 0.
rol.b #1,d1
move.b d1,d2
and.b #%1110,d1
movex.b d1,PLY_AKYst_PsgRegister13
;Closes the sound channel.
bset #PLY_AKYst_RRB_SoundChannelBit,d3
;Hardware volume.
if \3
if !(SID_VOICES|DUMP_SONG)
move.b d7,(a2)
move.b d4,(a3) ;(16 = hardware volume).
else
move.w d7,d0
lsr.w #8,d0
add.w d0,d0
add.w d0,d0
move.b d4,(a3,d0.w)
endif
add.w #$201,d7 ;Increases the volume register (low byte), frequency register (high byte)
else
if !(SID_VOICES|DUMP_SONG)
move.b #\volume,(a2)
move.b d4,(a3) ;(16 = hardware volume).
else
move.b d4,4*\volume(a3)
endif
endif
move.b d2,d1
;LSB for hardware period? Currently on b6.
rol.b #2,d1
bcs.s PLY_AKYst_RRB_NIS_HardwareOnly_LSB\@
bra.s PLY_AKYst_RRB_NIS_HardwareOnly_AfterLSB\@
PLY_AKYst_RRB_NIS_HardwareOnly_LSB\@:
movex.b (a1)+,PLY_AKYst_PsgRegister11
PLY_AKYst_RRB_NIS_HardwareOnly_AfterLSB\@:
;MSB for hardware period?
rol.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_HardwareOnly_MSB\@
bra.s PLY_AKYst_RRB_NIS_HardwareOnly_AfterMSB\@
PLY_AKYst_RRB_NIS_HardwareOnly_MSB\@:
movex.b (a1)+,PLY_AKYst_PsgRegister12
PLY_AKYst_RRB_NIS_HardwareOnly_AfterMSB\@:
;Noise or retrig?
rol.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_Hardware_Shared_NoiseOrRetrig_AndStop\@
if \3
rts
else
bra.s readregs_out\@
endif
;---------------------
PLY_AKYst_RRB_NIS_SoftwareAndHardware\@:
PLY_AKYst_RRB_NIS_SoftwareAndHardware_Loop\@:
;Hardware volume.
;Sends the volume.
if \3
if !(SID_VOICES|DUMP_SONG)
move.b d7,(a2)
move.b d4,(a3) ;(16 = hardware volume).
else
move.w d7,d0
ext.w d0
add.w d0,d0
add.w d0,d0
move.b d4,(a3,d0.w)
endif
addq.w #1,d7 ;Increases the volume register.
else
if !(SID_VOICES|DUMP_SONG)
move.b #\volume,(a2)
move.b d4,(a3) ;(16 = hardware volume).
else
move.b d4,4*\volume(a3)
endif
endif
;LSB of hardware period?
ror.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_SAHH_LSBH\@
bra.s PLY_AKYst_RRB_NIS_SAHH_AfterLSBH\@
PLY_AKYst_RRB_NIS_SAHH_LSBH\@:
movex.b (a1)+,PLY_AKYst_PsgRegister11
PLY_AKYst_RRB_NIS_SAHH_AfterLSBH\@:
;MSB of hardware period?
ror.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_SAHH_MSBH\@
bra.s PLY_AKYst_RRB_NIS_SAHH_AfterMSBH\@
PLY_AKYst_RRB_NIS_SAHH_MSBH\@:
movex.b (a1)+,PLY_AKYst_PsgRegister12
PLY_AKYst_RRB_NIS_SAHH_AfterMSBH\@:
;LSB of software period?
ror.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_SAHH_LSBS\@
bra.s PLY_AKYst_RRB_NIS_SAHH_AfterLSBS\@
PLY_AKYst_RRB_NIS_SAHH_LSBS\@:
if \3
if !(SID_VOICES|DUMP_SONG)
move.w d7,(a2)
move.b (a1)+,(a3)
else
move.w d7,d0
lsr.w #8,d0
add.w d0,d0
add.w d0,d0
move.b (a1)+,(a3,d0.w)
endif
;d7 high byte not increased on purpose.
else
if !(SID_VOICES|DUMP_SONG)
move.w #\frequency,(a2)
move.b (a1)+,(a3)
else
move.b (a1)+,4*\frequency(a3)
endif
endif
PLY_AKYst_RRB_NIS_SAHH_AfterLSBS\@:
;MSB of software period?
ror.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_SAHH_MSBS\@
bra.s PLY_AKYst_RRB_NIS_SAHH_AfterMSBS\@
PLY_AKYst_RRB_NIS_SAHH_MSBS\@:
;Sends the MSB software frequency.
if \3
add.w #1<<8,d7
if !(SID_VOICES|DUMP_SONG)
move.w d7,(a2)
move.b (a1)+,(a3)
else
move.w d7,d0
lsr.w #8,d0
add.w d0,d0
add.w d0,d0
move.b (a1)+,(a3,d0.w)
endif
sub.w #1<<8,d7 ;Yup. Will be compensated below.
else
if !(SID_VOICES|DUMP_SONG)
move.b #\frequency+1,(a2)
move.b (a1)+,(a3)
else
move.b (a1)+,4*(\frequency+1)(a3)
endif
endif
PLY_AKYst_RRB_NIS_SAHH_AfterMSBS\@:
if \3
add.w #2<<8,d7
endif
;New hardware envelope?
ror.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_SAHH_Envelope\@
bra.s PLY_AKYst_RRB_NIS_SAHH_AfterEnvelope\@
PLY_AKYst_RRB_NIS_SAHH_Envelope\@:
movex.b (a1)+,PLY_AKYst_PsgRegister13
PLY_AKYst_RRB_NIS_SAHH_AfterEnvelope\@:
;Retrig and/or noise?
ror.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_Hardware_Shared_NoiseOrRetrig_AndStop\@
if \3
rts
else
bra.s readregs_out\@
endif
;This code is shared with the HardwareOnly. It reads the Noise/Retrig byte, interprets it and exits.
;------------------------------------------
PLY_AKYst_RRB_NIS_Hardware_Shared_NoiseOrRetrig_AndStop\@:
;Noise or retrig. Reads the next byte.
move.b (a1)+,d1
;Retrig?
ror.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_S_NOR_Retrig\@
bra.s PLY_AKYst_RRB_NIS_S_NOR_AfterRetrig\@
PLY_AKYst_RRB_NIS_S_NOR_Retrig\@:
bset #7,d1 ;A value to make sure the retrig is performed, yet d1 can still be use.
movex.b d1,PLY_AKYst_PsgRegister13_Retrig
PLY_AKYst_RRB_NIS_S_NOR_AfterRetrig\@:
;Noise? If no, nothing more to do.
ror.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_S_NOR_Noise\@
if \3
rts
else
bra.s readregs_out\@
endif
PLY_AKYst_RRB_NIS_S_NOR_Noise\@:
;Noise. Opens the noise channel.
bclr #PLY_AKYst_RRB_NoiseChannelBit,d3
;Is there a new noise value? If yes, gets the noise.
ror.b #1,d1
bcs.s PLY_AKYst_RRB_NIS_S_NOR_SetNoise\@
if \3
rts
else
bra.s readregs_out\@
endif
PLY_AKYst_RRB_NIS_S_NOR_SetNoise\@:
;Sets the noise.
movex.b d1,PLY_AKYst_PsgRegister6
if \3
rts
else
; bra.s readregs_out\@
endif
readregs_out\@:
endm
endif