Home » Archimedes archive » Zipped Apps » 6502em » !6502Em/src/Sound6
!6502Em/src/Sound6
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Zipped Apps » 6502em |
| Filename: | !6502Em/src/Sound6 |
| Read OK: | ✔ |
| File size: | 5697 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
10REM > Sound5
20REM
30REM BBC Sound and Speech emulation library
40REM For Mike Borcherds BBC emulator
50REM This file by Dominic Symes
60
70REM Set up global defaults
80DEF PROCsound_define
90REM Size of circular buffer for each channel
100sound_buf_size_log%=10
110sound_buf_size%=(1<<sound_buf_size_log%)
120ENDPROC
130
140REM Call to set up sound tables
150DEF PROCsound_init
160LOCAL a,f%
170PROCsound_define
180REMvolume%=127
190DIM sound_buffer% (4*sound_buf_size%)
200DIM sound_vol_table% &40
210DIM sound_sample% &200
220DIM sound_stack% &80
230FOR f%=0 TO &3FF
240?(sound_buffer%+f%)=f%*10
250NEXT
260SYS "Sound_Volume",127 TO sc_vol
270REM Set up sound sample for pitch channels - half way between
280REM a sine wave and square wave gives best likeness.
290FOR f%=0 TO &7F
300SYS "6502_Sound",f%,A%
310a=SIN((f%/128)*PI)
320IF a<>0 THEN a=a^.2
330SYS "Sound_SoundLog",&7FFFFFFF*a TO a
340?(sound_sample%+f%)=a
350?(sound_sample%+&80+f%)=a+1
360NEXT
370REM Set up the sound sample for the pulse generator
380FOR f%=0 TO &3F
390?(sound_sample%+&100+f%)=?(sound_sample%+f%*(8/4))
400NEXT
410FOR f%=0 TO &BF
420?(sound_sample%+&110+f%)=?(sound_sample%+&80+f%*(8/12))
430NEXT
440SYS "Sound_Volume",sc_vol
450sound_voice%=code+!(code+22*4)
460!(sound_voice%+0)=sound_buffer%
470!(sound_voice%+4)=sound_vol_table%
480!(sound_voice%+8)=sound_sample%
490!(sound_voice%+12)=sound_stack%+&40
500sound_voice%+=16
510ENDPROC
520
530DEFPROCsound_reinit
540sound_voice%=code+!(code+22*4)
550!(sound_voice%+0)=sound_buffer%
560!(sound_voice%+4)=sound_vol_table%
570!(sound_voice%+8)=sound_sample%
580!(sound_voice%+12)=sound_stack%+&40
590sound_voice%+=16
600ENDPROC
610
620REM Call just before starting the emulator
630DEF PROCsound_setup
640LOCAL f%,a%
650SYS "Sound_InstallVoice",sound_voice%,0 TO ,sound_voice_slot%
660SYS "Sound_Configure",4,208,48,0,0 TO sc_0,sc_1,sc_2,sc_3,sc_4
670SYS "Sound_AttachVoice",1,1 TO ,sv_1
680SYS "Sound_AttachVoice",2,1 TO ,sv_2
690SYS "Sound_AttachVoice",3,1 TO ,sv_3
700SYS "Sound_AttachVoice",4,1 TO ,sv_4
710SYS "Sound_AttachNamedVoice",1,"6502Emulator"
720SYS "Sound_AttachNamedVoice",2,"6502Emulator"
730SYS "Sound_AttachNamedVoice",3,"6502Emulator"
740SYS "Sound_AttachNamedVoice",4,"6502Emulator"
750REM Start infinite duration notes on each of the channels
760SYS "Sound_Volume",volume% TO sc_vol
770REM Set up the linear to log volume conversion
780FOR f%=0 TO &F
790a%=f%+(f%<<4)
800a%=a%+(a%<<8)
810a%=a%+(a%<<16)
820SYS "Sound_SoundLog",(a%>>>1) TO a%
830REMPRINT a%
840?(sound_vol_table%+f%)=a%
850NEXT
860SOUND 1,-1,1,255
870SOUND 2,-1,1,255
880SOUND 3,-1,1,255
890SOUND 4,-1,1,255
900ENDPROC
910
920REM Call after exiting the emulator
930DEF PROCsound_restore
940SYS "Sound_Volume",sc_vol
950SYS "Sound_Configure",sc_0,sc_1,sc_2,sc_3,sc_4
960SYS "Sound_AttachVoice",1,sv_1
970SYS "Sound_AttachVoice",2,sv_2
980SYS "Sound_AttachVoice",3,sv_3
990SYS "Sound_AttachVoice",4,sv_4
1000SYS "Sound_RemoveVoice",0,sound_voice_slot%
1010ENDPROC
1020
1030REM Code to interpret writes to the sound chip
1040REM mem=3 A=4 X=5 Y=6 F=7 SP=8 time=9 zpc=10 table=11
1050REM p=pass
1060DEF FNsound_latch
1070PROCsound_define
1080[OPT p
1090
1100; the following byte should be written by regb_4f and should
1110; hold a copy of what's on the slow data bus
1120
1130.sound_data EQUD 0
1140
1150; Notes:
1160; Clock is 2Mhz. One buffer fill every 48 micro secs = 96 cycles.
1170; Pitch phase increment = &60000 / (10 bit BBC sound chip freq)
1180; Cleary greatest sensible pitch increment is &4000, so very
1190; small BBC frequencies are conventionally meaningless.
1200; A BBC frequency of 1 is assumed to be an
1210; attempt to modulate the amplitude manually (eg Superior
1220; Software speech) and is handled accordingly.
1230
1240;E Called when latch writes to sound generator
1250; sound_data contains a copy of the byte written to the slow
1260; data bus
1270; R0=value written to latch (b0-b2=0)
1280; R3=BBC memory address (mem)
1290; R9=time in cycles until next clock interrupt
1300;X R0-R2,R13 corrupted
1310; Exits via MOV PC,R14
1320
1330.sound_latch
1340STR mem,memstore
1350TST R0,#1<<3
1360MOVNE PC,R14 ; active low
1370LDR R13,(sound_buffs_addr+12)
1380STMFD R13!,{R3,R14}
1390LDRB R0,sound_data ; get the byte written
1400TST R0,#1<<7
1410BEQ sound_update ; update the frequency
1420MOV R1,R0,LSR#5
1430AND R1,R1,#3 ; channel number (0=tone3 3=noise)
1440TST R0,#1<<4
1450AND R0,R0,#&0F ; data is in b0-b3
1460BNE sound_volume ; volume control
1470TEQ R1,#3 ; noise channel?
1480STRNE R1,sound_channel ; if not set current channel
1490ADR R14,sound_freq0
1500LDR R3,[R14,R1,LSL#2] ; get the current frequency
1510BIC R2,R3,#&0F ; clear bottom 4 bits
1520ORR R2,R2,R0 ; new frequency
1530STR R2,[R14,R1,LSL#2] ; new frequency
1540B sound_frequency
1550.sound_update ; update frequency
1560LDR R1,sound_channel ; current channel
1570ADR R14,sound_freq0
1580LDR R3,[R14,R1,LSL#2] ; get the current frequency
1590AND R2,R3,#&0F ; loose the top bits
1600AND R0,R0,#&3F ; b4-b9 of frequency
1610ORR R2,R2,R0,LSL#4 ; add new high order bits
1620STR R2,[R14,R1,LSL#2] ; new frequency
1630B sound_frequency
1640;NB not sure whether you should update sound_channel here?
1650.sound_volume ; R0=volume (15 off-0 max)
1660RSB R0,R0,#15 ; new vol 0=off 15=max now!
1670ADR R14,sound_amp0
1680LDRB R2,[R14,R1] ; old volume
1690TEQ R0,R2
1700;BEQ sound_latch_end ; volume hasn't changed
1710STRB R0,[R14,R1] ; write the new volume
1720TEQ R1,#3
1730BEQ sound_latch_end ; ignore noise channel
1740ADR R14,sound_freq0
1750LDR R0,[R14,R1,LSL#2] ; get frequency setting
1760TEQ R0,#1
1770BLEQ make_sound ; it's speech
1780B sound_latch_end
1790.sound_frequency ; R1=channel R2=new freq (10 bit)
1800TEQ R1,#3 ; R3=old freq (10 bit)
1810BLEQ sound_noisefreq ; Convert R2 to 10 bit format
1820TEQ R2,#1 ; check for speach
1830BEQ sound_speach_start
1840TEQ R3,#1
1850BLEQ sound_speach_stop
1860MOV R0,#&60000
1870STMFD R13!,{R1} ; save channel number
1880MOV R1,R2 ; denomenator
1890BL div_mod ; R0=pitch accumulator inc corr R3
1900LDMFD R13!,{R1} ; restore channel number
1910CMP R0,#0
1920MOVLE R0,#0
1930CMP R0,#&4000
1940MOVGE R0,#&4000 ; R0=new pitch increment
1950ADR R14,sound_pitch0
1960LDR R2,[R14,R1,LSL#2]
1970MOV R2,R2,LSR#16
1980ORR R2,R0,R2,LSL#16 ; install new pitch increment
1990STR R2,[R14,R1,LSL#2]
2000TEQ R1,#2 ; is it pitch channel 1
2010BNE sound_latch_end ; no
2020LDR R0,sound_freq3 ; 3 bit freq setting of noise chan
2030AND R0,R0,#3
2040TEQ R0,#3 ; is it based on channel 1?
2050BNE sound_latch_end ; no
2060;BL sound_debug
2070MOV R1,#3 ; channel 0
2080LDR R2,sound_freq3 ; channel 0 10-bit frequency
2090B sound_frequency ; update frequency for channel 0
2100.sound_latch_end ; EXIT
2110;BL sound_debug ; print up debug data
2120LDMFD R13!,{R3,PC} ; EXIT
2130.sound_speach_start
2140TEQ R3,#1
2150BEQ sound_latch_end ; already started
2160BL sound_get_time
2170ADR R0,sound_time0
2180STR R2,[R0,R1,LSL#2] ; time this channel last updated
2190TEQ R1,#0
2200;BLEQ log_start
2210B sound_latch_end
2220
2230;E Called when speach stops
2240;X Corrupts R0
2250
2260.sound_speach_stop
2270TEQ R1,#0
2280;BEQ log_end
2290MOV PC,R14
2300
2310.memstore
2320EQUD 0
2330
2340;E R9=Emulator time 'till next event
2350;X R2=current time on the sound decrementing 2MHz clock
2360; R0 corrupted
2370
2380.sound_get_time
2390LDR R0,memstore
2400LDR R2,[R0,#min]
2410SUB R2,R2,R9 ; time passed since last event
2420LDR R0,[R0,#sound_timer]
2430SUB R2,R0,R2 ; current time (dec at 2Mhz)
2440MOV PC,R14
2450
2460;E Volume changed (not just been set to the same value!!!)
2470; This channel in speech mode.
2480; R2=the old volume before the change
2490; R1=BBC channel number (0-3) R9=time
2500;X Buffer filled for manual amplitude modulation
2510; R0 corrupted
2520
2530.make_sound
2540STMFD R13!,{R1-R5,R14}
2550; TEQ R1,#0
2560; LDMNEFD R13!,{R1-R5,PC}
2570; LDRB R0,[mem,#&67]
2580; LDRB R14,[mem,#&68]
2590; ADD R0,R0,R14,LSL#8
2600; LDRB R14,[R0,Y,LSR#24]
2610; ADD R0,R0,Y
2620; ADD R0,R0,R14,LSL#16
2630; LDR R0,[mem,#&60]
2640; BL log_word
2650; MOV R0,R2
2660; BL log_word
2670MOV R4,R2,LSL#1 ; amplitude 0-30
2680SUBS R4,R4,#15 ; amplitude -15 to 15
2690MOVPL R0,#0
2700MOVMI R0,#1 ; sign bit
2710RSBMI R4,R4,#0 ; now +ve (1-15)
2720LDR R14,(sound_buffs_addr+4) ; log amp table
2730LDRB R4,[R14,R4] ; VIDC amp
2740EOR R4,R4,R0 ; bung in sign to get sample
2750BL sound_get_time ; R2=current time
2760ADR R14,sound_time0
2770LDR R3,[R14,R1,LSL#2] ; time this channel last updated
2780SUBS R0,R3,R2 ; time passed since last update
2790MOVMI R3,R2 ; clip if gone negative
2800CMP R0,#&C000 ; greater than one buffer fill?
2810ADDGE R3,R2,#&C000 ; clip if so
2820; BL log_word
2830ADR R14,sound_filled0
2840LDR R5,[R14,R1,LSL#2] ; current offset in the buffer
2850.make_sound_1
2860ADR R14,sound_read0
2870LDR R0,[R14,R1,LSL#2] ; amount read to
2880SUBS R0,R5,R0
2890ADDMI R0,R0,#sound_buf_size% ; amount in the buffer
2900CMP R0,#512
2910BGT make_sound_1 ; wait for output to catch up
2920LDR R0,sound_buffs_addr
2930ADD R0,R0,R1,LSL#sound_buf_size_log% ; address of buffer
2940.make_sound_2
2950SUB R3,R3,#96 ; try and do another byte
2960CMP R3,R2
2970BLT make_sound_3 ; can't
2980STRB R4,[R0,R5] ; write out a byte
2990; STMFD R13!,{R0}
3000; MOV R0,R4
3010; BL log_word
3020; LDMFD R13!,{R0}
3030ADD R5,R5,#1
3040CMP R5,#sound_buf_size%
3050MOVGE R5,#0 ; wrap buffer offset
3060B make_sound_2
3070.make_sound_3
3080ADD R3,R3,#96
3090ADR R14,sound_filled0
3100STR R5,[R14,R1,LSL#2] ; new buffer offset
3110ADR R14,sound_time0
3120STR R3,[R14,R1,LSL#2] ; new time last updated
3130LDMFD R13!,{R1-R5,PC}
3140
3150;E R2=noise channel frequency (bbc format)
3160;X R2=noise channel frequnecy (10 bit)
3170; Corrupts R0
3180; Don't need to clip since pitch inc can go up to &60000
3190
3200.sound_noisefreq
3210AND R0,R2,#3
3220TEQ R0,#3
3230BEQ sound_usefreq2
3240AND R0,R2,#7 ; FB NF1 NF0
3250ADR R2,sound_noisetab
3260LDR R2,[R2,R0,LSL#2]
3270MOV PC,R14
3280.sound_usefreq2
3290TST R2,#4
3300LDR R2,sound_freq2 ; use tone generator 1 frequency
3310;MOVEQ R2,R2,LSL#4 ; multiply if pulse channel
3320;MOVNE R2,R2,LSR#2 ; divide if noise channel
3321
3322MOV R2,R2,LSL#4 ; changed 11/96 MRB
3323
3370MOV PC,R14
3380.sound_noisetab
3390EQUD &F1 ; pulse high
3400EQUD &1D5 ; pulse med
3410EQUD &3C6 ; pulse low
3420EQUD 0
3430EQUD &1F ; noise high
3440EQUD &A3 ; noise med
3450EQUD &100 ; noise low
3460EQUD 0
3470
3480.sound_channel EQUD 0 ; current note channel (0-2)
3490.sound_freq0 EQUD 0 ; frequency of channel 3 (10 bit)
3500.sound_freq1 EQUD 0 ; frequency of channel 2
3510.sound_freq2 EQUD 0 ; frequency of channel 1
3520.sound_freq3 EQUD 0 ; frequency of channel 0 X FB NF1,0
3530.sound_amp0 EQUB 0 ; amplitude of channel 3 0-15
3540.sound_amp1 EQUB 0 ; amplitude of channel 2
3550.sound_amp2 EQUB 0 ; amplitude of channel 1
3560.sound_amp3 EQUB 0 ; amplitude of channel 0
3570.sound_read0 EQUD 0 ; offset in buffer of start of
3580.sound_read1 EQUD 0 ; unread data
3590.sound_read2 EQUD 0 ; channels 0-3
3600.sound_read3 EQUD 0 ;
3610.sound_filled0 EQUD 0 ; offset in buf filled to chann 0
3620.sound_filled1 EQUD 0 ; offset in buf filled to chann 1
3630.sound_filled2 EQUD 0 ; offset in buf filled to chann 2
3640.sound_filled3 EQUD 0 ; offset in buf filled to chann 3
3650.sound_pitch0 EQUD 0 ; phase pitch channel 0
3660.sound_pitch1 EQUD 0 ; phase pitch channel 1
3670.sound_pitch2 EQUD 0 ; phase pitch channel 2
3680.sound_pitch3 EQUD 0 ; phase pitch channel 3
3690.sound_time0 EQUD 0 ; last time (R9) channel updated
3700.sound_time1 EQUD 0 ; channel 1 (decrements as time
3710.sound_time2 EQUD 0 ; channel 2 goes on)
3720.sound_time3 EQUD 0 ; channel 3
3730
3740;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3750; Fill sound buffer ;
3760;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3770
3780;E R0=number of bytes to fill in buffer
3790; R5=bbc channel number
3800; R14 not usable (in IRQ mode)
3810; Return address on stack
3820
3830.sound_fillto
3840STMFD R13!,{R1-R4,R11-R12}
3850ADDS R3,R0,#0 ; number of bytes to do
3860LDMLEFD R13!,{R1-R4,R11-R12,PC} ; none
3870ADR R4,sound_filled0
3880LDR R1,[R4,R5,LSL#2] ; current offset filled to
3890LDR R11,sound_buffs_addr
3900ADD R11,R11,R5,LSL#sound_buf_size_log% ; address of the buffer
3910ADD R12,R11,#sound_buf_size% ; end of the buffer
3920ADD R11,R11,R1 ; address at which to start filling
3930ADR R4,sound_pitch0
3940LDR R1,[R4,R5,LSL#2] ; get phase pitch inc
3950ADR R4,sound_amp0
3960LDRB R4,[R4,R5] ; get BBC amp for this channel
3970LDR R0,(sound_buffs_addr+4) ; volume scaling table
3980LDRB R4,[R0,R4] ; scale volume to VIDC format
3990RSB R4,R4,#(127<<1) ; attenuation
4000TEQ R5,#3 ; noise channel?
4010BEQ sound_fillto_noise
4020ADR R0,sound_freq0
4030LDR R0,[R0,R5,LSL#2]
4040TEQ R0,#1
4050BEQ sound_fillto_speach
4060LDR R2,(sound_buffs_addr+8) ; standard sample
4070.sound_fillto_loop
4080ADD R1,R1,R1,LSL#16 ; advance waveform
4090LDRB R0,[R2,R1,LSR#24]
4100SUBS R0,R0,R4
4110MOVMI R0,#0
4120STRB R0,[R11],#1 ; write next byte
4130CMP R11,R12
4140SUBGE R11,R12,#sound_buf_size% ; wrap the pointer
4150SUBS R3,R3,#1
4160BHI sound_fillto_loop
4170ADR R4,sound_pitch0
4180STR R1,[R4,R5,LSL#2] ; save new pitch inc
4190.sound_fillto_end
4200SUB R12,R12,#sound_buf_size%
4210SUB R11,R11,R12 ; offset in buffer filled to
4220ADR R12,sound_filled0
4230STR R11,[R12,R5,LSL#2]
4240LDMFD R13!,{R1-R4,R11-R12,PC}
4250.sound_fillto_noise
4260LDR R2,sound_freq3
4270TST R2,#1<<2 ; look at FB
4280LDREQ R2,(sound_buffs_addr+8)
4290ADDEQ R2,R2,#&100 ; pulse sample
4300BEQ sound_fillto_loop ; periodic noise
4310STMFD R13!,{R6-R7} ; need two more registers
4320LDR R2,sound_noiseseed ; white noise seed
4330RSB R4,R4,#(127<<1) ; recover amplitude
4340EOR R0,R4,#1 ; other sign
4350LDR R6,sound_noiseeor ; eor
4360.sfn_loop ; white noise loop
4370MOV R7,R1
4380ADD R1,R1,R1,LSL#16
4390EOR R7,R7,R1
4400TST R7,#&40000000
4410BEQ sfn_skip ; bit hasn't changed so don't adv
4420MOVS R2,R2,LSR#1
4430EORCS R2,R2,R6
4440BICCC R1,R1,#&40000000
4450ORRCS R1,R1,#&40000000
4460.sfn_skip
4470TST R1,#&40000000
4480STREQB R0,[R11],#1
4490STRNEB R4,[R11],#1
4500CMP R11,R12
4510SUBGE R11,R12,#sound_buf_size% ; wrap the pointer
4520SUBS R3,R3,#1
4530BHI sfn_loop
4540LDMFD R13!,{R6-R7}
4550STR R2,sound_noiseseed
4560STR R1,sound_pitch3
4570B sound_fillto_end
4580.sound_fillto_speach ; direct amp modification
4590ADR R4,sound_amp0
4600LDRB R4,[R4,R5] ; get BBC amp for this channel
4610MOV R4,R4,LSL#1 ; 0-30
4620SUBS R4,R4,#15 ; amplitude -15 to 15
4630MOVPL R0,#0
4640MOVMI R0,#1 ; sign bit
4650RSBMI R4,R4,#0 ; now +ve (1-15)
4660LDR R1,(sound_buffs_addr+4) ; log amp table
4670LDRB R4,[R1,R4] ; VIDC amp
4680EOR R4,R4,R0 ; bung in sign to get sample
4690ADR R2,sound_time0
4700LDR R0,[R2,R5,LSL#2] ; get time last updated
4710.sound_fillto_speach_1
4720STRB R4,[R11],#1
4730SUB R0,R0,#96
4740CMP R11,R12
4750SUBGE R11,R12,#sound_buf_size% ; wrap the pointer
4760SUBS R3,R3,#1
4770BHI sound_fillto_speach_1
4780;STR R0,[R2,R5,LSL#2]
4790B sound_fillto_end
4800.sound_noiseseed EQUD &446D6954 ; white noise seed (R2)
4810.sound_noiseeor EQUD &82D4E1B8 ; white noise eor (R6)
4820
4830;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
4840; Voice generator ;
4850;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
4860
4870.sound_buffs_addr
4880EQUD 0 ; address of buffer
4890EQUD 0 ; volume table
4900EQUD 0 ; sample address
4910EQUD 0 ; stack address
4920
4930; SCCB
4940; #0 b0-b7 Arc volume (R1)
4950; #4 phase accumulator (b0-b15=inc) (R2)
4960; #8 -
4970; #12 number of buffer fills left to do (R4)
4980; #16 bbc channel number (0-3) (R5)
4990; #20 Volume scaled log amp table (R6)
5000
5010.sound_voiceheader
5020B sound_vfill
5030B sound_vfill
5040B sound_vfill
5050B sound_vgateoff
5060B sound_vinstantiate
5070LDMFD R13!,{PC}
5080LDMFD R13!,{PC}
5090EQUD sound_voicename-sound_voiceheader
5100.sound_voicename
5110EQUS "6502Emulator"+CHR$0
5120ALIGN
5130
5140;E Return address on stack
5150; R14 not usable (in IRQ mode)
5160
5170.sound_vfill
5180LDMFD R9,{R1-R6} ; R5=bbc channel number
5190ADR R1,sound_read0
5200LDR R2,[R1,R5,LSL#2] ; offset of unread data
5210ADR R1,sound_filled0
5220LDR R0,[R1,R5,LSL#2] ; offset buffer filled to
5230SUBS R0,R0,R2
5240ADDMI R0,R0,#sound_buf_size% ; amount in the buffer
5250RSBS R0,R0,#208 ; amount extra needed
5260BLE sound_fill_ret
5270ADR R1,sound_fill_ret
5280STMFD R13!,{R1} ; put return address on stack
5290B sound_fillto ; ensure the buffer full enough
5300.sound_fill_ret
5310ADR R1,sound_read0
5320LDR R0,[R1,R5,LSL#2] ; off of unread data
5330ADD R2,R0,#208 ; new offset after we've finished
5340CMP R2,#sound_buf_size%
5350SUBGE R2,R2,#sound_buf_size% ; wrap it
5360STR R2,[R1,R5,LSL#2]
5370LDR R2,sound_buffs_addr
5380ADD R2,R2,R5,LSL#sound_buf_size_log% ; address of buffer
5390ADD R3,R2,#sound_buf_size% ; end of buffer
5400ADD R2,R2,R0 ; current address
5410.sound_fill_loop ; NB Amp already scaled
5420LDRB R0,[R2],#1 ; get next byte
5430STRB R0,[R12],R11
5440CMP R2,R3
5450SUBGE R2,R3,#sound_buf_size%
5460LDRB R0,[R2],#1 ; get next byte
5470STRB R0,[R12],R11
5480CMP R2,R3
5490SUBGE R2,R3,#sound_buf_size%
5500LDRB R0,[R2],#1 ; get next byte
5510STRB R0,[R12],R11
5520CMP R2,R3
5530SUBGE R2,R3,#sound_buf_size%
5540LDRB R0,[R2],#1 ; get next byte
5550STRB R0,[R12],R11
5560CMP R2,R3
5570SUBGE R2,R3,#sound_buf_size%
5580CMP R12,R10
5590BLT sound_fill_loop
5600MOV R0,#8 ; voice still active
5610LDMFD R13!,{PC}
5620
5630;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
5640; print out debug data - current channel settings ;
5650;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
5660
5670;X R1=channel being changed
5680
5690.sound_debug
5700STMFD R13!,{R0-R1,R14}
5710SWI &11F
5720SWI &100
5730MOV R0,R1
5740SWI "XOS_WriteC" ; jump to row n
5750MOV R0,R1
5760BL sound_debug2 ; channel
5770ADR R14,sound_freq0
5780LDR R0,[R14,R1,LSL#2]
5790BL sound_debug2 ; freq
5800ADR R14,sound_amp0
5810LDRB R0,[R14,R1]
5820BL sound_debug2 ; amp
5830LDMFD R13!,{R0-R1,PC}
5840
5850]
5860=""
5870
5880REM MISC STUFF
5890
5900DEF FNsound_misc
5910[OPT p
5920
5930;E R0=number to print
5940;X Number printed
5950
5960.sound_debug2 ; output number in R0 to debug
5970STMFD R13!,{R0-R2,R14}
5980ADR R1,sound_debug_buf
5990MOV R2,#16
6000SWI "XOS_ConvertHex8"
6010SWI "XOS_Write0"
6020SWI &120
6030LDMFD R13!,{R0-R2,PC}
6040.sound_debug_buf
6050FNsound_mem(16)
6060
6070;E R0=channel number-1 (0-7)
6080; Return address on top of stack
6090
6100.sound_vinstantiate
6110STMFD R13!,{R0-R5}
6120MOV R5,R0 ; save channel number
6130MOV R0,#0
6140MOV R1,#0
6150MOV R2,#0
6160MOV R3,#0
6170MOV R4,#0
6180SWI "XSound_Configure"
6190ADD R0,R5,#1 ; channel number
6200MOV R1,#20
6210LDR R2,[R3,#12]
6220SWI "XSound_WriteControlBlock" ; volume scaled log amp
6230ADD R0,R5,#1
6240MOV R1,#16
6250MOV R2,R5 ; bbc channel number
6260CMP R2,#4
6270MOVCS R2,#0 ; clip
6280SWI "XSound_WriteControlBlock"
6290LDMFD R13!,{R0-R5,PC}
6300
6310.sound_vgateoff
6320MOV R0,#0
6330.sound_gateoff_loop
6340STRB R0,[R12],R11
6350STRB R0,[R12],R11
6360STRB R0,[R12],R11
6370STRB R0,[R12],R11
6380CMP R12,R10
6390BLT sound_gateoff_loop
6400MOV R0,#1
6410LDMFD R13!,{PC}
6420
6430;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
6440; Divide routine ;
6450;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
6460
6470\E R0=numerator R1=denominator
6480\X R0=R0 Div R1 R2=R0 Mod R1 R0-R3 corrupted |
6490
6500.div_mod
6510MOV R2,#0 \ clear remainder
6520ADDS R0,R0,R0 \ double numerator
6530RSB R1,R1,#0 \ negate denom
6540MOV R3,#32
6550.div_mod_1
6560ADCS R2,R1,R2,LSL#1:SUBCC R2,R2,R1:ADCS R0,R0,R0
6570ADCS R2,R1,R2,LSL#1:SUBCC R2,R2,R1:ADCS R0,R0,R0
6580ADCS R2,R1,R2,LSL#1:SUBCC R2,R2,R1:ADCS R0,R0,R0
6590ADCS R2,R1,R2,LSL#1:SUBCC R2,R2,R1:ADCS R0,R0,R0
6600SUB R3,R3,#4
6610TEQ R3,#0
6620BNE div_mod_1 \ DO NOT CORRUPT CARRY
6630MOVS PC,R14
6640
6650.log_start
6660STMFD R13!,{R0-R2,R14}
6670MOV R0,#&88
6680ADR R1,log_fname
6690SWI "OS_Find"
6700STR R0,log_handle
6710LDMFD R13!,{R0-R2,PC}
6720.log_fname EQUS "$.TMP.LogFile"+CHR$0
6730ALIGN
6740.log_handle EQUD 0
6750.log_temp EQUD 0
6760
6770.log_end
6780STMFD R13!,{R0-R2,R14}
6790MOV R0,#0
6800LDR R1,log_handle
6810SWI "OS_Find"
6820LDMFD R13!,{R0-R2,PC}
6830
6840; R0=word to log
6850
6860.log_word
6870STMFD R13!,{R0-R5,R14}
6880STR R0,log_temp
6890MOV R0,#2
6900LDR R1,log_handle
6910ADR R2,log_temp
6920MOV R3,#4
6930SWI "OS_GBPB"
6940LDMFD R13!,{R0-R5,PC}
6950
6960]
6970=""
6980
6990DEF FNsound_mem(a%)
7000P%+=a%:O%+=a%
7010=""
� > Sound5
�
,� BBC Sound and Speech emulation library
(%� For Mike Borcherds BBC emulator
2 � This file by Dominic Symes
<
F � Set up global defaults
P� �sound_define
Z.� Size of circular buffer for each channel
dsound_buf_size_log%=10
n,sound_buf_size%=(1<<sound_buf_size_log%)
x�
�
�!� Call to set up sound tables
�� �sound_init
�
� a,f%
��sound_define
��volume%=127
�'� sound_buffer% (4*sound_buf_size%)
�� sound_vol_table% &40
�� sound_sample% &200
�� sound_stack% &80
�� f%=0 � &3FF
� ?(sound_buffer%+f%)=f%*10
��
"ș "Sound_Volume",127 � sc_vol
?� Set up sound sample for pitch channels - half way between
6� a sine wave and square wave gives best likeness.
"� f%=0 � &7F
,ș "6502_Sound",f%,A%
6a=�((f%/128)*�)
@� a<>0 � a=a^.2
J'ș "Sound_SoundLog",&7FFFFFFF*a � a
T?(sound_sample%+f%)=a
^ ?(sound_sample%+&80+f%)=a+1
h�
r5� Set up the sound sample for the pulse generator
|� f%=0 � &3F
�6?(sound_sample%+&100+f%)=?(sound_sample%+f%*(8/4))
��
�� f%=0 � &BF
�;?(sound_sample%+&110+f%)=?(sound_sample%+&80+f%*(8/12))
��
� ș "Sound_Volume",sc_vol
�"sound_voice%=code+!(code+22*4)
�#!(sound_voice%+0)=sound_buffer%
�&!(sound_voice%+4)=sound_vol_table%
�#!(sound_voice%+8)=sound_sample%
�'!(sound_voice%+12)=sound_stack%+&40
�sound_voice%+=16
��
��sound_reinit
"sound_voice%=code+!(code+22*4)
&#!(sound_voice%+0)=sound_buffer%
0&!(sound_voice%+4)=sound_vol_table%
:#!(sound_voice%+8)=sound_sample%
D'!(sound_voice%+12)=sound_stack%+&40
Nsound_voice%+=16
X�
b
l,� Call just before starting the emulator
v� �sound_setup
� � f%,a%
�?ș "Sound_InstallVoice",sound_voice%,0 � ,sound_voice_slot%
�@ș "Sound_Configure",4,208,48,0,0 � sc_0,sc_1,sc_2,sc_3,sc_4
�&ș "Sound_AttachVoice",1,1 � ,sv_1
�&ș "Sound_AttachVoice",2,1 � ,sv_2
�&ș "Sound_AttachVoice",3,1 � ,sv_3
�&ș "Sound_AttachVoice",4,1 � ,sv_4
�0ș "Sound_AttachNamedVoice",1,"6502Emulator"
�0ș "Sound_AttachNamedVoice",2,"6502Emulator"
�0ș "Sound_AttachNamedVoice",3,"6502Emulator"
�0ș "Sound_AttachNamedVoice",4,"6502Emulator"
�;� Start infinite duration notes on each of the channels
�&ș "Sound_Volume",volume% � sc_vol
0� Set up the linear to log volume conversion
� f%=0 � &F
a%=f%+(f%<<4)
a%=a%+(a%<<8)
*a%=a%+(a%<<16)
4%ș "Sound_SoundLog",(a%>>>1) � a%
>
�PRINT a%
H ?(sound_vol_table%+f%)=a%
R�
\� 1,-1,1,255
f� 2,-1,1,255
p� 3,-1,1,255
z� 4,-1,1,255
��
�
�%� Call after exiting the emulator
�� �sound_restore
� ș "Sound_Volume",sc_vol
�1ș "Sound_Configure",sc_0,sc_1,sc_2,sc_3,sc_4
�!ș "Sound_AttachVoice",1,sv_1
�!ș "Sound_AttachVoice",2,sv_2
�!ș "Sound_AttachVoice",3,sv_3
�!ș "Sound_AttachVoice",4,sv_4
�.ș "Sound_RemoveVoice",0,sound_voice_slot%
��
�
0� Code to interpret writes to the sound chip
7� mem=3 A=4 X=5 Y=6 F=7 SP=8 time=9 zpc=10 table=11
� p=pass
$� �sound_latch
.�sound_define
8
[OPT p
B
L@; the following byte should be written by regb_4f and should
V0; hold a copy of what's on the slow data bus
`
j.sound_data EQUD 0
t
~ ; Notes:
�E; Clock is 2Mhz. One buffer fill every 48 micro secs = 96 cycles.
�C; Pitch phase increment = &60000 / (10 bit BBC sound chip freq)
�@; Cleary greatest sensible pitch increment is &4000, so very
�;; small BBC frequencies are conventionally meaningless.
�.; A BBC frequency of 1 is assumed to be an
�=; attempt to modulate the amplitude manually (eg Superior
�2; Software speech) and is handled accordingly.
�
�2;E Called when latch writes to sound generator
�A; sound_data contains a copy of the byte written to the slow
�; data bus
�*; R0=value written to latch (b0-b2=0)
"; R3=BBC memory address (mem)
3; R9=time in cycles until next clock interrupt
;X R0-R2,R13 corrupted
; Exits via MOV PC,R14
(
2.sound_latch
<STR mem,memstore
FTST R0,#1<<3
P.MOVNE PC,R14 ; active low
Z!LDR R13,(sound_buffs_addr+12)
dSTMFD R13!,{R3,R14}
n8LDRB R0,sound_data ; get the byte written
xTST R0,#1<<7
�8BEQ sound_update ; update the frequency
�MOV R1,R0,LSR#5
�B� R1,R1,#3 ; channel number (0=tone3 3=noise)
�TST R0,#1<<4
�2� R0,R0,#&0F ; data is in b0-b3
�2BNE sound_volume ; volume control
�2TEQ R1,#3 ; noise channel?
�>STRNE R1,sound_channel ; if not set current channel
�ADR R14,sound_freq0
�=LDR R3,[R14,R1,LSL#2] ; get the current frequency
�7BIC R2,R3,#&0F ; clear bottom 4 bits
�0�R R2,R2,R0 ; new frequency
�1STR R2,[R14,R1,LSL#2] ; new frequency
B sound_frequency
4.sound_update ; update frequency
3LDR R1,sound_channel ; current channel
"ADR R14,sound_freq0
,=LDR R3,[R14,R1,LSL#2] ; get the current frequency
64� R2,R3,#&0F ; loose the top bits
@4� R0,R0,#&3F ; b4-b9 of frequency
J:�R R2,R2,R0,LSL#4 ; add new high order bits
T1STR R2,[R14,R1,LSL#2] ; new frequency
^B sound_frequency
h>;NB not sure whether you should update sound_channel here?
r<.sound_volume ; R0=volume (15 off-0 max)
|=RSB R0,R0,#15 ; new vol 0=off 15=max now!
�ADR R14,sound_amp0
�.LDRB R2,[R14,R1] ; old volume
�
TEQ R0,R2
�:;BEQ sound_latch_end ; volume hasn't changed
�8STRB R0,[R14,R1] ; write the new volume
�
TEQ R1,#3
�8BEQ sound_latch_end ; ignore noise channel
�ADR R14,sound_freq0
�9LDR R0,[R14,R1,LSL#2] ; get frequency setting
�
TEQ R0,#1
�/BLEQ make_sound ; it's speech
�B sound_latch_end
�C.sound_frequency ; R1=channel R2=new freq (10 bit)
8TEQ R1,#3 ; R3=old freq (10 bit)
?BLEQ sound_noisefreq ; Convert R2 to 10 bit format
4TEQ R2,#1 ; check for speach
&BEQ sound_speach_start
0
TEQ R3,#1
:BLEQ sound_speach_stop
DMOV R0,#&60000
N7STMFD R13!,{R1} ; save channel number
X/MOV R1,R2 ; denomenator
bDBL div_mod ; R0=pitch accumulator inc corr R3
l:LDMFD R13!,{R1} ; restore channel number
v
CMP R0,#0
�MOVLE R0,#0
�CMP R0,#&4000
�:MOVGE R0,#&4000 ; R0=new pitch increment
�ADR R14,sound_pitch0
�LDR R2,[R14,R1,LSL#2]
�MOV R2,R2,LSR#16
�>�R R2,R0,R2,LSL#16 ; install new pitch increment
�STR R2,[R14,R1,LSL#2]
�9TEQ R1,#2 ; is it pitch channel 1
�&BNE sound_latch_end ; no
�DLDR R0,sound_freq3 ; 3 bit freq setting of noise chan
�� R0,R0,#3
�=TEQ R0,#3 ; is it based on channel 1?
&BNE sound_latch_end ; no
;BL sound_debug
-MOV R1,#3 ; channel 0
>LDR R2,sound_freq3 ; channel 0 10-bit frequency
*BB sound_frequency ; update frequency for channel 0
4(.sound_latch_end ; EXIT
>8;BL sound_debug ; print up debug data
H(LDMFD R13!,{R3,PC} ; EXIT
R.sound_speach_start
\
TEQ R3,#1
f3BEQ sound_latch_end ; already started
pBL sound_get_time
zADR R0,sound_time0
�BSTR R2,[R0,R1,LSL#2] ; time this channel last updated
�
TEQ R1,#0
�;BLEQ log_start
�B sound_latch_end
�
� ;E Called when speach stops
�;X Corrupts R0
�
�.sound_speach_stop
�
TEQ R1,#0
�;BEQ log_end
�MOV PC,R14
�
.memstore
EQUD 0
$(;E R9=Emulator time 'till next event
.;;X R2=current time on the sound decrementing 2MHz clock
8; R0 corrupted
B
L.sound_get_time
VLDR R0,memstore
`LDR R2,[R0,#min]
j@SUB R2,R2,R9 ; time passed since last event
t LDR R0,[R0,#sound_timer]
~>SUB R2,R0,R2 ; current time (dec at 2Mhz)
�MOV PC,R14
�
�>;E Volume changed (not just been set to the same value!!!)
�#; This channel in speech mode.
�*; R2=the old volume before the change
�*; R1=BBC channel number (0-3) R9=time
�4;X Buffer filled for manual amplitude modulation
�; R0 corrupted
�
�.make_sound
�STMFD R13!,{R1-R5,R14}
�; TEQ R1,#0
; LDMNEFD R13!,{R1-R5,PC}
; LDRB R0,[mem,#&67]
; LDRB R14,[mem,#&68]
; ADD R0,R0,R14,LSL#8
( ; LDRB R14,[R0,Y,LSR#24]
2; ADD R0,R0,Y
<; ADD R0,R0,R14,LSL#16
F; LDR R0,[mem,#&60]
P; BL log_word
Z; MOV R0,R2
d; BL log_word
n2MOV R4,R2,LSL#1 ; amplitude 0-30
x7SUBS R4,R4,#15 ; amplitude -15 to 15
�MOVPL R0,#0
�,MOVMI R0,#1 ; sign bit
�2RSBMI R4,R4,#0 ; now +ve (1-15)
�1LDR R14,(sound_buffs_addr+4) ; log amp table
�,LDRB R4,[R14,R4] ; VIDC amp
�<� R4,R4,R0 ; bung in sign to get sample
�3BL sound_get_time ; R2=current time
�ADR R14,sound_time0
�BLDR R3,[R14,R1,LSL#2] ; time this channel last updated
�ASUBS R0,R3,R2 ; time passed since last update
�9MOVMI R3,R2 ; clip if gone negative
�ACMP R0,#&C000 ; greater than one buffer fill?
�.ADDGE R3,R2,#&C000 ; clip if so
; BL log_word
ADR R14,sound_filled0
@LDR R5,[R14,R1,LSL#2] ; current offset in the buffer
".make_sound_1
,ADR R14,sound_read0
62LDR R0,[R14,R1,LSL#2] ; amount read to
@SUBS R0,R5,R0
J8ADDMI R0,R0,#sound_buf_size% ; amount in the buffer
TCMP R0,#512
^?BGT make_sound_1 ; wait for output to catch up
hLDR R0,sound_buffs_addr
r<ADD R0,R0,R1,LSL#sound_buf_size_log% ; address of buffer
|.make_sound_2
�;SUB R3,R3,#96 ; try and do another byte
�
CMP R3,R2
�)BLT make_sound_3 ; can't
�4STRB R4,[R0,R5] ; write out a byte
�; STMFD R13!,{R0}
�; MOV R0,R4
�; BL log_word
�; LDMFD R13!,{R0}
�ADD R5,R5,#1
�CMP R5,#sound_buf_size%
�6MOVGE R5,#0 ; wrap buffer offset
�B make_sound_2
�.make_sound_3
ADD R3,R3,#96
ADR R14,sound_filled0
5STR R5,[R14,R1,LSL#2] ; new buffer offset
&ADR R14,sound_time0
09STR R3,[R14,R1,LSL#2] ; new time last updated
:LDMFD R13!,{R1-R5,PC}
D
N.;E R2=noise channel frequency (bbc format)
X*;X R2=noise channel frequnecy (10 bit)
b; Corrupts R0
l=; Don't need to clip since pitch inc can go up to &60000
v
�.sound_noisefreq
�� R0,R2,#3
�
TEQ R0,#3
�BEQ sound_usefreq2
�,� R0,R2,#7 ; FB NF1 NF0
�ADR R2,sound_noisetab
�LDR R2,[R2,R0,LSL#2]
�MOV PC,R14
�.sound_usefreq2
�
TST R2,#4
�BLDR R2,sound_freq2 ; use tone generator 1 frequency
�;;�Q R2,R2,LSL#4 ; multiply if pulse channel
�<;MOVNE R2,R2,LSR#2 ; divide if noise channel
�
�4MOV R2,R2,LSL#4 ; changed 11/96 MRB
�
*MOV PC,R14
4.sound_noisetab
>.EQUD &F1 ; pulse high
H-EQUD &1D5 ; pulse med
R-EQUD &3C6 ; pulse low
\
EQUD 0
f.EQUD &1F ; noise high
p-EQUD &A3 ; noise med
z-EQUD &100 ; noise low
�
EQUD 0
�
�>.sound_channel EQUD 0 ; current note channel (0-2)
�C.sound_freq0 EQUD 0 ; frequency of channel 3 (10 bit)
�:.sound_freq1 EQUD 0 ; frequency of channel 2
�:.sound_freq2 EQUD 0 ; frequency of channel 1
�E.sound_freq3 EQUD 0 ; frequency of channel 0 X FB NF1,0
�?.sound_amp0 EQUB 0 ; amplitude of channel 3 0-15
�:.sound_amp1 EQUB 0 ; amplitude of channel 2
�:.sound_amp2 EQUB 0 ; amplitude of channel 1
�:.sound_amp3 EQUB 0 ; amplitude of channel 0
�@.sound_read0 EQUD 0 ; offset in buffer of start of
�/.sound_read1 EQUD 0 ; unread data
0.sound_read2 EQUD 0 ; channels 0-3
#.sound_read3 EQUD 0 ;
C.sound_filled0 EQUD 0 ; offset in buf filled to chann 0
$C.sound_filled1 EQUD 0 ; offset in buf filled to chann 1
.C.sound_filled2 EQUD 0 ; offset in buf filled to chann 2
8C.sound_filled3 EQUD 0 ; offset in buf filled to chann 3
B9.sound_pitch0 EQUD 0 ; phase pitch channel 0
L9.sound_pitch1 EQUD 0 ; phase pitch channel 1
V9.sound_pitch2 EQUD 0 ; phase pitch channel 2
`9.sound_pitch3 EQUD 0 ; phase pitch channel 3
jB.sound_time0 EQUD 0 ; last time (R9) channel updated
tA.sound_time1 EQUD 0 ; channel 1 (decrements as time
~7.sound_time2 EQUD 0 ; channel 2 goes on)
�-.sound_time3 EQUD 0 ; channel 3
�
�7;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
�7; Fill sound buffer ;
�7;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
�
�+;E R0=number of bytes to fill in buffer
� ; R5=bbc channel number
�#; R14 not usable (in IRQ mode)
� ; Return address on stack
�
�.sound_fillto
STMFD R13!,{R1-R4,R11-R12}
9ADDS R3,R0,#0 ; number of bytes to do
*LDMLEFD R13!,{R1-R4,R11-R12,PC} ; none
ADR R4,sound_filled0
(<LDR R1,[R4,R5,LSL#2] ; current offset filled to
2 LDR R11,sound_buffs_addr
<BADD R11,R11,R5,LSL#sound_buf_size_log% ; address of the buffer
F5ADD R12,R11,#sound_buf_size% ; end of the buffer
PEADD R11,R11,R1 ; address at which to start filling
ZADR R4,sound_pitch0
d7LDR R1,[R4,R5,LSL#2] ; get phase pitch inc
nADR R4,sound_amp0
x@LDRB R4,[R4,R5] ; get BBC amp for this channel
�8LDR R0,(sound_buffs_addr+4) ; volume scaling table
�?LDRB R4,[R0,R4] ; scale volume to VIDC format
�/RSB R4,R4,#(127<<1) ; attenuation
�2TEQ R5,#3 ; noise channel?
�BEQ sound_fillto_noise
�ADR R0,sound_freq0
�LDR R0,[R0,R5,LSL#2]
�
TEQ R0,#1
�BEQ sound_fillto_speach
�3LDR R2,(sound_buffs_addr+8) ; standard sample
�.sound_fillto_loop
�4ADD R1,R1,R1,LSL#16 ; advance waveform
�LDRB R0,[R2,R1,LSR#24]
SUBS R0,R0,R4
MOVMI R0,#0
3STRB R0,[R11],#1 ; write next byte
"CMP R11,R12
,5SUBGE R11,R12,#sound_buf_size% ; wrap the pointer
6SUBS R3,R3,#1
@BHI sound_fillto_loop
JADR R4,sound_pitch0
T6STR R1,[R4,R5,LSL#2] ; save new pitch inc
^.sound_fillto_end
h SUB R12,R12,#sound_buf_size%
r>SUB R11,R11,R12 ; offset in buffer filled to
|ADR R12,sound_filled0
�STR R11,[R12,R5,LSL#2]
�!LDMFD R13!,{R1-R4,R11-R12,PC}
�.sound_fillto_noise
�LDR R2,sound_freq3
�.TST R2,#1<<2 ; look at FB
�!LDREQ R2,(sound_buffs_addr+8)
�0ADDEQ R2,R2,#&100 ; pulse sample
�2BEQ sound_fillto_loop ; periodic noise
�;STMFD R13!,{R6-R7} ; need two more registers
�4LDR R2,sound_noiseseed ; white noise seed
�5RSB R4,R4,#(127<<1) ; recover amplitude
�,� R0,R4,#1 ; other sign
�'LDR R6,sound_noiseeor ; eor
4.sfn_loop ; white noise loop
MOV R7,R1
ADD R1,R1,R1,LSL#16
&� R7,R7,R1
0TST R7,#&40000000
:CBEQ sfn_skip ; bit hasn't changed so don't adv
DMOVS R2,R2,LSR#1
N�CS R2,R2,R6
XBICCC R1,R1,#&40000000
b�RCS R1,R1,#&40000000
l
.sfn_skip
vTST R1,#&40000000
�STREQB R0,[R11],#1
�STRNEB R4,[R11],#1
�CMP R11,R12
�5SUBGE R11,R12,#sound_buf_size% ; wrap the pointer
�SUBS R3,R3,#1
�BHI sfn_loop
�LDMFD R13!,{R6-R7}
�STR R2,sound_noiseseed
�STR R1,sound_pitch3
�B sound_fillto_end
�;.sound_fillto_speach ; direct amp modification
�ADR R4,sound_amp0
�@LDRB R4,[R4,R5] ; get BBC amp for this channel
(MOV R4,R4,LSL#1 ; 0-30
7SUBS R4,R4,#15 ; amplitude -15 to 15
MOVPL R0,#0
,MOVMI R0,#1 ; sign bit
*2RSBMI R4,R4,#0 ; now +ve (1-15)
41LDR R1,(sound_buffs_addr+4) ; log amp table
>,LDRB R4,[R1,R4] ; VIDC amp
H<� R4,R4,R0 ; bung in sign to get sample
RADR R2,sound_time0
\9LDR R0,[R2,R5,LSL#2] ; get time last updated
f.sound_fillto_speach_1
pSTRB R4,[R11],#1
zSUB R0,R0,#96
�CMP R11,R12
�5SUBGE R11,R12,#sound_buf_size% ; wrap the pointer
�SUBS R3,R3,#1
� BHI sound_fillto_speach_1
�;STR R0,[R2,R5,LSL#2]
�B sound_fillto_end
�;.sound_noiseseed EQUD &446D6954 ; white noise seed (R2)
�:.sound_noiseeor EQUD &82D4E1B8 ; white noise eor (R6)
�
�7;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
�7; Voice generator ;
�7;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
�
.sound_buffs_addr
5EQUD 0 ; address of buffer
0EQUD 0 ; volume table
$2EQUD 0 ; sample address
.1EQUD 0 ; stack address
8
B
; SCCB
L ; #0 b0-b7 Arc volume (R1)
V,; #4 phase accumulator (b0-b15=inc) (R2)
`
; #8 -
j0; #12 number of buffer fills left to do (R4)
t'; #16 bbc channel number (0-3) (R5)
~*; #20 Volume scaled log amp table (R6)
�
�.sound_voiceheader
�B sound_vfill
�B sound_vfill
�B sound_vfill
�B sound_vgateoff
�B sound_vinstantiate
�LDMFD R13!,{PC}
�LDMFD R13!,{PC}
�*EQUD sound_voicename-sound_voiceheader
�.sound_voicename
�EQUS "6502Emulator"+�0
ALIGN
;E Return address on stack
#; R14 not usable (in IRQ mode)
(
2.sound_vfill
<9LDMFD R9,{R1-R6} ; R5=bbc channel number
FADR R1,sound_read0
P9LDR R2,[R1,R5,LSL#2] ; offset of unread data
ZADR R1,sound_filled0
d;LDR R0,[R1,R5,LSL#2] ; offset buffer filled to
nSUBS R0,R0,R2
x8ADDMI R0,R0,#sound_buf_size% ; amount in the buffer
�7RSBS R0,R0,#208 ; amount extra needed
�BLE sound_fill_ret
�ADR R1,sound_fill_ret
�?STMFD R13!,{R1} ; put return address on stack
�AB sound_fillto ; ensure the buffer full enough
�.sound_fill_ret
�ADR R1,sound_read0
�6LDR R0,[R1,R5,LSL#2] ; off of unread data
�CADD R2,R0,#208 ; new offset after we've finished
�CMP R2,#sound_buf_size%
�+SUBGE R2,R2,#sound_buf_size% ; wrap it
�STR R2,[R1,R5,LSL#2]
�LDR R2,sound_buffs_addr
<ADD R2,R2,R5,LSL#sound_buf_size_log% ; address of buffer
1ADD R3,R2,#sound_buf_size% ; end of buffer
3ADD R2,R2,R0 ; current address
"9.sound_fill_loop ; NB Amp already scaled
,1LDRB R0,[R2],#1 ; get next byte
6STRB R0,[R12],R11
@
CMP R2,R3
J SUBGE R2,R3,#sound_buf_size%
T1LDRB R0,[R2],#1 ; get next byte
^STRB R0,[R12],R11
h
CMP R2,R3
r SUBGE R2,R3,#sound_buf_size%
|1LDRB R0,[R2],#1 ; get next byte
�STRB R0,[R12],R11
�
CMP R2,R3
� SUBGE R2,R3,#sound_buf_size%
�1LDRB R0,[R2],#1 ; get next byte
�STRB R0,[R12],R11
�
CMP R2,R3
� SUBGE R2,R3,#sound_buf_size%
�CMP R12,R10
�BLT sound_fill_loop
�6MOV R0,#8 ; voice still active
�LDMFD R13!,{PC}
�
�7;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
7; print out debug data - current channel settings ;
7;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
& ;X R1=channel being changed
0
:.sound_debug
DSTMFD R13!,{R0-R1,R14}
N SWI &11F
X SWI &100
b
MOV R0,R1
l1SWI "XOS_WriteC" ; jump to row n
v
MOV R0,R1
�+BL sound_debug2 ; channel
�ADR R14,sound_freq0
�LDR R0,[R14,R1,LSL#2]
�(BL sound_debug2 ; freq
�ADR R14,sound_amp0
�LDRB R0,[R14,R1]
�'BL sound_debug2 ; amp
�LDMFD R13!,{R0-R1,PC}
�
�]
�=""
�
�� MISC STUFF
� �sound_misc
[OPT p
*;E R0=number to print
4;X Number printed
>
H6.sound_debug2 ; output number in R0 to debug
RSTMFD R13!,{R0-R2,R14}
\ADR R1,sound_debug_buf
fMOV R2,#16
pSWI "XOS_ConvertHex8"
zSWI "XOS_Write0"
� SWI &120
�LDMFD R13!,{R0-R2,PC}
�.sound_debug_buf
��sound_mem(16)
�
� ;E R0=channel number-1 (0-7)
�%; Return address on top of stack
�
�.sound_vinstantiate
�STMFD R13!,{R0-R5}
�7MOV R5,R0 ; save channel number
�
MOV R0,#0
�
MOV R1,#0
MOV R2,#0
MOV R3,#0
MOV R4,#0
$SWI "XSound_Configure"
.2ADD R0,R5,#1 ; channel number
8MOV R1,#20
BLDR R2,[R3,#12]
LCSWI "XSound_WriteControlBlock" ; volume scaled log amp
VADD R0,R5,#1
`MOV R1,#16
j6MOV R2,R5 ; bbc channel number
t
CMP R2,#4
~(MOVCS R2,#0 ; clip
�"SWI "XSound_WriteControlBlock"
�LDMFD R13!,{R0-R5,PC}
�
�.sound_vgateoff
�
MOV R0,#0
�.sound_gateoff_loop
�STRB R0,[R12],R11
�STRB R0,[R12],R11
�STRB R0,[R12],R11
�STRB R0,[R12],R11
�CMP R12,R10
�BLT sound_gateoff_loop
MOV R0,#1
LDMFD R13!,{PC}
7;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(7; Divide routine ;
27;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
<
F$\E R0=numerator R1=denominator
P7\X R0=R0 Div R1 R2=R0 Mod R1 R0-R3 corrupted |
Z
d .div_mod
n3MOV R2,#0 \ clear remainder
x4ADDS R0,R0,R0 \ double numerator
�0RSB R1,R1,#0 \ negate denom
�MOV R3,#32
�.div_mod_1
�4ADCS R2,R1,R2,LSL#1:SUBCC R2,R2,R1:ADCS R0,R0,R0
�4ADCS R2,R1,R2,LSL#1:SUBCC R2,R2,R1:ADCS R0,R0,R0
�4ADCS R2,R1,R2,LSL#1:SUBCC R2,R2,R1:ADCS R0,R0,R0
�4ADCS R2,R1,R2,LSL#1:SUBCC R2,R2,R1:ADCS R0,R0,R0
�SUB R3,R3,#4
�
TEQ R3,#0
�6BNE div_mod_1 \ DO � CORRUPT CARRY
�MOVS PC,R14
�
�.log_start
STMFD R13!,{R0-R2,R14}
MOV R0,#&88
ADR R1,log_fname
"SWI "OS_Find"
,STR R0,log_handle
6LDMFD R13!,{R0-R2,PC}
@&.log_fname EQUS "$.TMP.LogFile"+�0
J ALIGN
T.log_handle EQUD 0
^.log_temp EQUD 0
h
r .log_end
|STMFD R13!,{R0-R2,R14}
�
MOV R0,#0
�LDR R1,log_handle
�SWI "OS_Find"
�LDMFD R13!,{R0-R2,PC}
�
�; R0=word to log
�
�
.log_word
�STMFD R13!,{R0-R5,R14}
�STR R0,log_temp
�
MOV R0,#2
�LDR R1,log_handle
�ADR R2,log_temp
MOV R3,#4
SWI "OS_GBPB"
LDMFD R13!,{R0-R5,PC}
&
0]
:=""
D
N� �sound_mem(a%)
XP%+=a%:O%+=a%
b=""
� 00000000 0d 00 0a 0e f4 20 3e 20 53 6f 75 6e 64 35 0d 00 |..... > Sound5..|
00000010 14 05 f4 0d 00 1e 2c f4 20 42 42 43 20 53 6f 75 |......,. BBC Sou|
00000020 6e 64 20 61 6e 64 20 53 70 65 65 63 68 20 65 6d |nd and Speech em|
00000030 75 6c 61 74 69 6f 6e 20 6c 69 62 72 61 72 79 0d |ulation library.|
00000040 00 28 25 f4 20 46 6f 72 20 4d 69 6b 65 20 42 6f |.(%. For Mike Bo|
00000050 72 63 68 65 72 64 73 20 42 42 43 20 65 6d 75 6c |rcherds BBC emul|
00000060 61 74 6f 72 0d 00 32 20 f4 20 54 68 69 73 20 66 |ator..2 . This f|
00000070 69 6c 65 20 62 79 20 44 6f 6d 69 6e 69 63 20 53 |ile by Dominic S|
00000080 79 6d 65 73 0d 00 3c 04 0d 00 46 1c f4 20 53 65 |ymes..<...F.. Se|
00000090 74 20 75 70 20 67 6c 6f 62 61 6c 20 64 65 66 61 |t up global defa|
000000a0 75 6c 74 73 0d 00 50 13 dd 20 f2 73 6f 75 6e 64 |ults..P.. .sound|
000000b0 5f 64 65 66 69 6e 65 0d 00 5a 2e f4 20 53 69 7a |_define..Z.. Siz|
000000c0 65 20 6f 66 20 63 69 72 63 75 6c 61 72 20 62 75 |e of circular bu|
000000d0 66 66 65 72 20 66 6f 72 20 65 61 63 68 20 63 68 |ffer for each ch|
000000e0 61 6e 6e 65 6c 0d 00 64 1a 73 6f 75 6e 64 5f 62 |annel..d.sound_b|
000000f0 75 66 5f 73 69 7a 65 5f 6c 6f 67 25 3d 31 30 0d |uf_size_log%=10.|
00000100 00 6e 2c 73 6f 75 6e 64 5f 62 75 66 5f 73 69 7a |.n,sound_buf_siz|
00000110 65 25 3d 28 31 3c 3c 73 6f 75 6e 64 5f 62 75 66 |e%=(1<<sound_buf|
00000120 5f 73 69 7a 65 5f 6c 6f 67 25 29 0d 00 78 05 e1 |_size_log%)..x..|
00000130 0d 00 82 04 0d 00 8c 21 f4 20 43 61 6c 6c 20 74 |.......!. Call t|
00000140 6f 20 73 65 74 20 75 70 20 73 6f 75 6e 64 20 74 |o set up sound t|
00000150 61 62 6c 65 73 0d 00 96 11 dd 20 f2 73 6f 75 6e |ables..... .soun|
00000160 64 5f 69 6e 69 74 0d 00 a0 0a ea 20 61 2c 66 25 |d_init..... a,f%|
00000170 0d 00 aa 11 f2 73 6f 75 6e 64 5f 64 65 66 69 6e |.....sound_defin|
00000180 65 0d 00 b4 10 f4 76 6f 6c 75 6d 65 25 3d 31 32 |e.....volume%=12|
00000190 37 0d 00 be 27 de 20 73 6f 75 6e 64 5f 62 75 66 |7...'. sound_buf|
000001a0 66 65 72 25 20 28 34 2a 73 6f 75 6e 64 5f 62 75 |fer% (4*sound_bu|
000001b0 66 5f 73 69 7a 65 25 29 0d 00 c8 1a de 20 73 6f |f_size%)..... so|
000001c0 75 6e 64 5f 76 6f 6c 5f 74 61 62 6c 65 25 20 26 |und_vol_table% &|
000001d0 34 30 0d 00 d2 18 de 20 73 6f 75 6e 64 5f 73 61 |40..... sound_sa|
000001e0 6d 70 6c 65 25 20 26 32 30 30 0d 00 dc 16 de 20 |mple% &200..... |
000001f0 73 6f 75 6e 64 5f 73 74 61 63 6b 25 20 26 38 30 |sound_stack% &80|
00000200 0d 00 e6 11 e3 20 66 25 3d 30 20 b8 20 26 33 46 |..... f%=0 . &3F|
00000210 46 0d 00 f0 1d 3f 28 73 6f 75 6e 64 5f 62 75 66 |F....?(sound_buf|
00000220 66 65 72 25 2b 66 25 29 3d 66 25 2a 31 30 0d 00 |fer%+f%)=f%*10..|
00000230 fa 05 ed 0d 01 04 22 c8 99 20 22 53 6f 75 6e 64 |......".. "Sound|
00000240 5f 56 6f 6c 75 6d 65 22 2c 31 32 37 20 b8 20 73 |_Volume",127 . s|
00000250 63 5f 76 6f 6c 0d 01 0e 3f f4 20 53 65 74 20 75 |c_vol...?. Set u|
00000260 70 20 73 6f 75 6e 64 20 73 61 6d 70 6c 65 20 66 |p sound sample f|
00000270 6f 72 20 70 69 74 63 68 20 63 68 61 6e 6e 65 6c |or pitch channel|
00000280 73 20 2d 20 68 61 6c 66 20 77 61 79 20 62 65 74 |s - half way bet|
00000290 77 65 65 6e 0d 01 18 36 f4 20 61 20 73 69 6e 65 |ween...6. a sine|
000002a0 20 77 61 76 65 20 61 6e 64 20 73 71 75 61 72 65 | wave and square|
000002b0 20 77 61 76 65 20 67 69 76 65 73 20 62 65 73 74 | wave gives best|
000002c0 20 6c 69 6b 65 6e 65 73 73 2e 0d 01 22 10 e3 20 | likeness...".. |
000002d0 66 25 3d 30 20 b8 20 26 37 46 0d 01 2c 19 c8 99 |f%=0 . &7F..,...|
000002e0 20 22 36 35 30 32 5f 53 6f 75 6e 64 22 2c 66 25 | "6502_Sound",f%|
000002f0 2c 41 25 0d 01 36 13 61 3d b5 28 28 66 25 2f 31 |,A%..6.a=.((f%/1|
00000300 32 38 29 2a af 29 0d 01 40 13 e7 20 61 3c 3e 30 |28)*.)..@.. a<>0|
00000310 20 8c 20 61 3d 61 5e 2e 32 0d 01 4a 27 c8 99 20 | . a=a^.2..J'.. |
00000320 22 53 6f 75 6e 64 5f 53 6f 75 6e 64 4c 6f 67 22 |"Sound_SoundLog"|
00000330 2c 26 37 46 46 46 46 46 46 46 2a 61 20 b8 20 61 |,&7FFFFFFF*a . a|
00000340 0d 01 54 19 3f 28 73 6f 75 6e 64 5f 73 61 6d 70 |..T.?(sound_samp|
00000350 6c 65 25 2b 66 25 29 3d 61 0d 01 5e 1f 3f 28 73 |le%+f%)=a..^.?(s|
00000360 6f 75 6e 64 5f 73 61 6d 70 6c 65 25 2b 26 38 30 |ound_sample%+&80|
00000370 2b 66 25 29 3d 61 2b 31 0d 01 68 05 ed 0d 01 72 |+f%)=a+1..h....r|
00000380 35 f4 20 53 65 74 20 75 70 20 74 68 65 20 73 6f |5. Set up the so|
00000390 75 6e 64 20 73 61 6d 70 6c 65 20 66 6f 72 20 74 |und sample for t|
000003a0 68 65 20 70 75 6c 73 65 20 67 65 6e 65 72 61 74 |he pulse generat|
000003b0 6f 72 0d 01 7c 10 e3 20 66 25 3d 30 20 b8 20 26 |or..|.. f%=0 . &|
000003c0 33 46 0d 01 86 36 3f 28 73 6f 75 6e 64 5f 73 61 |3F...6?(sound_sa|
000003d0 6d 70 6c 65 25 2b 26 31 30 30 2b 66 25 29 3d 3f |mple%+&100+f%)=?|
000003e0 28 73 6f 75 6e 64 5f 73 61 6d 70 6c 65 25 2b 66 |(sound_sample%+f|
000003f0 25 2a 28 38 2f 34 29 29 0d 01 90 05 ed 0d 01 9a |%*(8/4))........|
00000400 10 e3 20 66 25 3d 30 20 b8 20 26 42 46 0d 01 a4 |.. f%=0 . &BF...|
00000410 3b 3f 28 73 6f 75 6e 64 5f 73 61 6d 70 6c 65 25 |;?(sound_sample%|
00000420 2b 26 31 31 30 2b 66 25 29 3d 3f 28 73 6f 75 6e |+&110+f%)=?(soun|
00000430 64 5f 73 61 6d 70 6c 65 25 2b 26 38 30 2b 66 25 |d_sample%+&80+f%|
00000440 2a 28 38 2f 31 32 29 29 0d 01 ae 05 ed 0d 01 b8 |*(8/12))........|
00000450 1c c8 99 20 22 53 6f 75 6e 64 5f 56 6f 6c 75 6d |... "Sound_Volum|
00000460 65 22 2c 73 63 5f 76 6f 6c 0d 01 c2 22 73 6f 75 |e",sc_vol..."sou|
00000470 6e 64 5f 76 6f 69 63 65 25 3d 63 6f 64 65 2b 21 |nd_voice%=code+!|
00000480 28 63 6f 64 65 2b 32 32 2a 34 29 0d 01 cc 23 21 |(code+22*4)...#!|
00000490 28 73 6f 75 6e 64 5f 76 6f 69 63 65 25 2b 30 29 |(sound_voice%+0)|
000004a0 3d 73 6f 75 6e 64 5f 62 75 66 66 65 72 25 0d 01 |=sound_buffer%..|
000004b0 d6 26 21 28 73 6f 75 6e 64 5f 76 6f 69 63 65 25 |.&!(sound_voice%|
000004c0 2b 34 29 3d 73 6f 75 6e 64 5f 76 6f 6c 5f 74 61 |+4)=sound_vol_ta|
000004d0 62 6c 65 25 0d 01 e0 23 21 28 73 6f 75 6e 64 5f |ble%...#!(sound_|
000004e0 76 6f 69 63 65 25 2b 38 29 3d 73 6f 75 6e 64 5f |voice%+8)=sound_|
000004f0 73 61 6d 70 6c 65 25 0d 01 ea 27 21 28 73 6f 75 |sample%...'!(sou|
00000500 6e 64 5f 76 6f 69 63 65 25 2b 31 32 29 3d 73 6f |nd_voice%+12)=so|
00000510 75 6e 64 5f 73 74 61 63 6b 25 2b 26 34 30 0d 01 |und_stack%+&40..|
00000520 f4 14 73 6f 75 6e 64 5f 76 6f 69 63 65 25 2b 3d |..sound_voice%+=|
00000530 31 36 0d 01 fe 05 e1 0d 02 08 04 0d 02 12 12 dd |16..............|
00000540 f2 73 6f 75 6e 64 5f 72 65 69 6e 69 74 0d 02 1c |.sound_reinit...|
00000550 22 73 6f 75 6e 64 5f 76 6f 69 63 65 25 3d 63 6f |"sound_voice%=co|
00000560 64 65 2b 21 28 63 6f 64 65 2b 32 32 2a 34 29 0d |de+!(code+22*4).|
00000570 02 26 23 21 28 73 6f 75 6e 64 5f 76 6f 69 63 65 |.&#!(sound_voice|
00000580 25 2b 30 29 3d 73 6f 75 6e 64 5f 62 75 66 66 65 |%+0)=sound_buffe|
00000590 72 25 0d 02 30 26 21 28 73 6f 75 6e 64 5f 76 6f |r%..0&!(sound_vo|
000005a0 69 63 65 25 2b 34 29 3d 73 6f 75 6e 64 5f 76 6f |ice%+4)=sound_vo|
000005b0 6c 5f 74 61 62 6c 65 25 0d 02 3a 23 21 28 73 6f |l_table%..:#!(so|
000005c0 75 6e 64 5f 76 6f 69 63 65 25 2b 38 29 3d 73 6f |und_voice%+8)=so|
000005d0 75 6e 64 5f 73 61 6d 70 6c 65 25 0d 02 44 27 21 |und_sample%..D'!|
000005e0 28 73 6f 75 6e 64 5f 76 6f 69 63 65 25 2b 31 32 |(sound_voice%+12|
000005f0 29 3d 73 6f 75 6e 64 5f 73 74 61 63 6b 25 2b 26 |)=sound_stack%+&|
00000600 34 30 0d 02 4e 14 73 6f 75 6e 64 5f 76 6f 69 63 |40..N.sound_voic|
00000610 65 25 2b 3d 31 36 0d 02 58 05 e1 0d 02 62 04 0d |e%+=16..X....b..|
00000620 02 6c 2c f4 20 43 61 6c 6c 20 6a 75 73 74 20 62 |.l,. Call just b|
00000630 65 66 6f 72 65 20 73 74 61 72 74 69 6e 67 20 74 |efore starting t|
00000640 68 65 20 65 6d 75 6c 61 74 6f 72 0d 02 76 12 dd |he emulator..v..|
00000650 20 f2 73 6f 75 6e 64 5f 73 65 74 75 70 0d 02 80 | .sound_setup...|
00000660 0b ea 20 66 25 2c 61 25 0d 02 8a 3f c8 99 20 22 |.. f%,a%...?.. "|
00000670 53 6f 75 6e 64 5f 49 6e 73 74 61 6c 6c 56 6f 69 |Sound_InstallVoi|
00000680 63 65 22 2c 73 6f 75 6e 64 5f 76 6f 69 63 65 25 |ce",sound_voice%|
00000690 2c 30 20 b8 20 2c 73 6f 75 6e 64 5f 76 6f 69 63 |,0 . ,sound_voic|
000006a0 65 5f 73 6c 6f 74 25 0d 02 94 40 c8 99 20 22 53 |e_slot%...@.. "S|
000006b0 6f 75 6e 64 5f 43 6f 6e 66 69 67 75 72 65 22 2c |ound_Configure",|
000006c0 34 2c 32 30 38 2c 34 38 2c 30 2c 30 20 b8 20 73 |4,208,48,0,0 . s|
000006d0 63 5f 30 2c 73 63 5f 31 2c 73 63 5f 32 2c 73 63 |c_0,sc_1,sc_2,sc|
000006e0 5f 33 2c 73 63 5f 34 0d 02 9e 26 c8 99 20 22 53 |_3,sc_4...&.. "S|
000006f0 6f 75 6e 64 5f 41 74 74 61 63 68 56 6f 69 63 65 |ound_AttachVoice|
00000700 22 2c 31 2c 31 20 b8 20 2c 73 76 5f 31 0d 02 a8 |",1,1 . ,sv_1...|
00000710 26 c8 99 20 22 53 6f 75 6e 64 5f 41 74 74 61 63 |&.. "Sound_Attac|
00000720 68 56 6f 69 63 65 22 2c 32 2c 31 20 b8 20 2c 73 |hVoice",2,1 . ,s|
00000730 76 5f 32 0d 02 b2 26 c8 99 20 22 53 6f 75 6e 64 |v_2...&.. "Sound|
00000740 5f 41 74 74 61 63 68 56 6f 69 63 65 22 2c 33 2c |_AttachVoice",3,|
00000750 31 20 b8 20 2c 73 76 5f 33 0d 02 bc 26 c8 99 20 |1 . ,sv_3...&.. |
00000760 22 53 6f 75 6e 64 5f 41 74 74 61 63 68 56 6f 69 |"Sound_AttachVoi|
00000770 63 65 22 2c 34 2c 31 20 b8 20 2c 73 76 5f 34 0d |ce",4,1 . ,sv_4.|
00000780 02 c6 30 c8 99 20 22 53 6f 75 6e 64 5f 41 74 74 |..0.. "Sound_Att|
00000790 61 63 68 4e 61 6d 65 64 56 6f 69 63 65 22 2c 31 |achNamedVoice",1|
000007a0 2c 22 36 35 30 32 45 6d 75 6c 61 74 6f 72 22 0d |,"6502Emulator".|
000007b0 02 d0 30 c8 99 20 22 53 6f 75 6e 64 5f 41 74 74 |..0.. "Sound_Att|
000007c0 61 63 68 4e 61 6d 65 64 56 6f 69 63 65 22 2c 32 |achNamedVoice",2|
000007d0 2c 22 36 35 30 32 45 6d 75 6c 61 74 6f 72 22 0d |,"6502Emulator".|
000007e0 02 da 30 c8 99 20 22 53 6f 75 6e 64 5f 41 74 74 |..0.. "Sound_Att|
000007f0 61 63 68 4e 61 6d 65 64 56 6f 69 63 65 22 2c 33 |achNamedVoice",3|
00000800 2c 22 36 35 30 32 45 6d 75 6c 61 74 6f 72 22 0d |,"6502Emulator".|
00000810 02 e4 30 c8 99 20 22 53 6f 75 6e 64 5f 41 74 74 |..0.. "Sound_Att|
00000820 61 63 68 4e 61 6d 65 64 56 6f 69 63 65 22 2c 34 |achNamedVoice",4|
00000830 2c 22 36 35 30 32 45 6d 75 6c 61 74 6f 72 22 0d |,"6502Emulator".|
00000840 02 ee 3b f4 20 53 74 61 72 74 20 69 6e 66 69 6e |..;. Start infin|
00000850 69 74 65 20 64 75 72 61 74 69 6f 6e 20 6e 6f 74 |ite duration not|
00000860 65 73 20 6f 6e 20 65 61 63 68 20 6f 66 20 74 68 |es on each of th|
00000870 65 20 63 68 61 6e 6e 65 6c 73 0d 02 f8 26 c8 99 |e channels...&..|
00000880 20 22 53 6f 75 6e 64 5f 56 6f 6c 75 6d 65 22 2c | "Sound_Volume",|
00000890 76 6f 6c 75 6d 65 25 20 b8 20 73 63 5f 76 6f 6c |volume% . sc_vol|
000008a0 0d 03 02 30 f4 20 53 65 74 20 75 70 20 74 68 65 |...0. Set up the|
000008b0 20 6c 69 6e 65 61 72 20 74 6f 20 6c 6f 67 20 76 | linear to log v|
000008c0 6f 6c 75 6d 65 20 63 6f 6e 76 65 72 73 69 6f 6e |olume conversion|
000008d0 0d 03 0c 0f e3 20 66 25 3d 30 20 b8 20 26 46 0d |..... f%=0 . &F.|
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00003690 6f 70 0d 0f f0 34 41 44 44 20 52 31 2c 52 31 2c |op...4ADD R1,R1,|
000036a0 52 31 2c 4c 53 4c 23 31 36 20 20 20 20 20 20 20 |R1,LSL#16 |
000036b0 20 20 20 20 3b 20 61 64 76 61 6e 63 65 20 77 61 | ; advance wa|
000036c0 76 65 66 6f 72 6d 0d 0f fa 1a 4c 44 52 42 20 52 |veform....LDRB R|
000036d0 30 2c 5b 52 32 2c 52 31 2c 4c 53 52 23 32 34 5d |0,[R2,R1,LSR#24]|
000036e0 0d 10 04 11 53 55 42 53 20 52 30 2c 52 30 2c 52 |....SUBS R0,R0,R|
000036f0 34 0d 10 0e 0f 4d 4f 56 4d 49 20 52 30 2c 23 30 |4....MOVMI R0,#0|
00003700 0d 10 18 33 53 54 52 42 20 52 30 2c 5b 52 31 31 |...3STRB R0,[R11|
00003710 5d 2c 23 31 20 20 20 20 20 20 20 20 20 20 20 20 |],#1 |
00003720 20 20 3b 20 77 72 69 74 65 20 6e 65 78 74 20 62 | ; write next b|
00003730 79 74 65 0d 10 22 0f 43 4d 50 20 52 31 31 2c 52 |yte..".CMP R11,R|
00003740 31 32 0d 10 2c 35 53 55 42 47 45 20 52 31 31 2c |12..,5SUBGE R11,|
00003750 52 31 32 2c 23 73 6f 75 6e 64 5f 62 75 66 5f 73 |R12,#sound_buf_s|
00003760 69 7a 65 25 20 3b 20 77 72 61 70 20 74 68 65 20 |ize% ; wrap the |
00003770 70 6f 69 6e 74 65 72 0d 10 36 11 53 55 42 53 20 |pointer..6.SUBS |
00003780 52 33 2c 52 33 2c 23 31 0d 10 40 19 42 48 49 20 |R3,R3,#1..@.BHI |
00003790 73 6f 75 6e 64 5f 66 69 6c 6c 74 6f 5f 6c 6f 6f |sound_fillto_loo|
000037a0 70 0d 10 4a 17 41 44 52 20 52 34 2c 73 6f 75 6e |p..J.ADR R4,soun|
000037b0 64 5f 70 69 74 63 68 30 0d 10 54 36 53 54 52 20 |d_pitch0..T6STR |
000037c0 52 31 2c 5b 52 34 2c 52 35 2c 4c 53 4c 23 32 5d |R1,[R4,R5,LSL#2]|
000037d0 20 20 20 20 20 20 20 20 20 20 3b 20 73 61 76 65 | ; save|
000037e0 20 6e 65 77 20 70 69 74 63 68 20 69 6e 63 0d 10 | new pitch inc..|
000037f0 5e 15 2e 73 6f 75 6e 64 5f 66 69 6c 6c 74 6f 5f |^..sound_fillto_|
00003800 65 6e 64 0d 10 68 20 53 55 42 20 52 31 32 2c 52 |end..h SUB R12,R|
00003810 31 32 2c 23 73 6f 75 6e 64 5f 62 75 66 5f 73 69 |12,#sound_buf_si|
00003820 7a 65 25 0d 10 72 3e 53 55 42 20 52 31 31 2c 52 |ze%..r>SUB R11,R|
00003830 31 31 2c 52 31 32 20 20 20 20 20 20 20 20 20 20 |11,R12 |
00003840 20 20 20 20 20 3b 20 6f 66 66 73 65 74 20 69 6e | ; offset in|
00003850 20 62 75 66 66 65 72 20 66 69 6c 6c 65 64 20 74 | buffer filled t|
00003860 6f 0d 10 7c 19 41 44 52 20 52 31 32 2c 73 6f 75 |o..|.ADR R12,sou|
00003870 6e 64 5f 66 69 6c 6c 65 64 30 0d 10 86 1a 53 54 |nd_filled0....ST|
00003880 52 20 52 31 31 2c 5b 52 31 32 2c 52 35 2c 4c 53 |R R11,[R12,R5,LS|
00003890 4c 23 32 5d 0d 10 90 21 4c 44 4d 46 44 20 52 31 |L#2]...!LDMFD R1|
000038a0 33 21 2c 7b 52 31 2d 52 34 2c 52 31 31 2d 52 31 |3!,{R1-R4,R11-R1|
000038b0 32 2c 50 43 7d 0d 10 9a 17 2e 73 6f 75 6e 64 5f |2,PC}.....sound_|
000038c0 66 69 6c 6c 74 6f 5f 6e 6f 69 73 65 0d 10 a4 16 |fillto_noise....|
000038d0 4c 44 52 20 52 32 2c 73 6f 75 6e 64 5f 66 72 65 |LDR R2,sound_fre|
000038e0 71 33 0d 10 ae 2e 54 53 54 20 52 32 2c 23 31 3c |q3....TST R2,#1<|
000038f0 3c 32 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |<2 |
00003900 20 20 20 20 3b 20 6c 6f 6f 6b 20 61 74 20 46 42 | ; look at FB|
00003910 0d 10 b8 21 4c 44 52 45 51 20 52 32 2c 28 73 6f |...!LDREQ R2,(so|
00003920 75 6e 64 5f 62 75 66 66 73 5f 61 64 64 72 2b 38 |und_buffs_addr+8|
00003930 29 0d 10 c2 30 41 44 44 45 51 20 52 32 2c 52 32 |)...0ADDEQ R2,R2|
00003940 2c 23 26 31 30 30 20 20 20 20 20 20 20 20 20 20 |,#&100 |
00003950 20 20 20 3b 20 70 75 6c 73 65 20 73 61 6d 70 6c | ; pulse sampl|
00003960 65 0d 10 cc 32 42 45 51 20 73 6f 75 6e 64 5f 66 |e...2BEQ sound_f|
00003970 69 6c 6c 74 6f 5f 6c 6f 6f 70 20 20 20 20 20 20 |illto_loop |
00003980 20 20 20 3b 20 70 65 72 69 6f 64 69 63 20 6e 6f | ; periodic no|
00003990 69 73 65 0d 10 d6 3b 53 54 4d 46 44 20 52 31 33 |ise...;STMFD R13|
000039a0 21 2c 7b 52 36 2d 52 37 7d 20 20 20 20 20 20 20 |!,{R6-R7} |
000039b0 20 20 20 20 20 3b 20 6e 65 65 64 20 74 77 6f 20 | ; need two |
000039c0 6d 6f 72 65 20 72 65 67 69 73 74 65 72 73 0d 10 |more registers..|
000039d0 e0 34 4c 44 52 20 52 32 2c 73 6f 75 6e 64 5f 6e |.4LDR R2,sound_n|
000039e0 6f 69 73 65 73 65 65 64 20 20 20 20 20 20 20 20 |oiseseed |
000039f0 3b 20 77 68 69 74 65 20 6e 6f 69 73 65 20 73 65 |; white noise se|
00003a00 65 64 0d 10 ea 35 52 53 42 20 52 34 2c 52 34 2c |ed...5RSB R4,R4,|
00003a10 23 28 31 32 37 3c 3c 31 29 20 20 20 20 20 20 20 |#(127<<1) |
00003a20 20 20 20 20 3b 20 72 65 63 6f 76 65 72 20 61 6d | ; recover am|
00003a30 70 6c 69 74 75 64 65 0d 10 f4 2c 82 20 52 30 2c |plitude...,. R0,|
00003a40 52 34 2c 23 31 20 20 20 20 20 20 20 20 20 20 20 |R4,#1 |
00003a50 20 20 20 20 20 20 20 3b 20 6f 74 68 65 72 20 73 | ; other s|
00003a60 69 67 6e 0d 10 fe 27 4c 44 52 20 52 36 2c 73 6f |ign...'LDR R6,so|
00003a70 75 6e 64 5f 6e 6f 69 73 65 65 6f 72 20 20 20 20 |und_noiseeor |
00003a80 20 20 20 20 20 3b 20 65 6f 72 0d 11 08 34 2e 73 | ; eor...4.s|
00003a90 66 6e 5f 6c 6f 6f 70 20 20 20 20 20 20 20 20 20 |fn_loop |
00003aa0 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 77 68 | ; wh|
00003ab0 69 74 65 20 6e 6f 69 73 65 20 6c 6f 6f 70 0d 11 |ite noise loop..|
00003ac0 12 0d 4d 4f 56 20 52 37 2c 52 31 0d 11 1c 17 41 |..MOV R7,R1....A|
00003ad0 44 44 20 52 31 2c 52 31 2c 52 31 2c 4c 53 4c 23 |DD R1,R1,R1,LSL#|
00003ae0 31 36 0d 11 26 0e 82 20 52 37 2c 52 37 2c 52 31 |16..&.. R7,R7,R1|
00003af0 0d 11 30 15 54 53 54 20 52 37 2c 23 26 34 30 30 |..0.TST R7,#&400|
00003b00 30 30 30 30 30 0d 11 3a 43 42 45 51 20 73 66 6e |00000..:CBEQ sfn|
00003b10 5f 73 6b 69 70 20 20 20 20 20 20 20 20 20 20 20 |_skip |
00003b20 20 20 20 20 20 20 20 3b 20 62 69 74 20 68 61 73 | ; bit has|
00003b30 6e 27 74 20 63 68 61 6e 67 65 64 20 73 6f 20 64 |n't changed so d|
00003b40 6f 6e 27 74 20 61 64 76 0d 11 44 14 4d 4f 56 53 |on't adv..D.MOVS|
00003b50 20 52 32 2c 52 32 2c 4c 53 52 23 31 0d 11 4e 10 | R2,R2,LSR#1..N.|
00003b60 82 43 53 20 52 32 2c 52 32 2c 52 36 0d 11 58 1a |.CS R2,R2,R6..X.|
00003b70 42 49 43 43 43 20 52 31 2c 52 31 2c 23 26 34 30 |BICCC R1,R1,#&40|
00003b80 30 30 30 30 30 30 0d 11 62 19 84 52 43 53 20 52 |000000..b..RCS R|
00003b90 31 2c 52 31 2c 23 26 34 30 30 30 30 30 30 30 0d |1,R1,#&40000000.|
00003ba0 11 6c 0d 2e 73 66 6e 5f 73 6b 69 70 0d 11 76 15 |.l..sfn_skip..v.|
00003bb0 54 53 54 20 52 31 2c 23 26 34 30 30 30 30 30 30 |TST R1,#&4000000|
00003bc0 30 0d 11 80 16 53 54 52 45 51 42 20 52 30 2c 5b |0....STREQB R0,[|
00003bd0 52 31 31 5d 2c 23 31 0d 11 8a 16 53 54 52 4e 45 |R11],#1....STRNE|
00003be0 42 20 52 34 2c 5b 52 31 31 5d 2c 23 31 0d 11 94 |B R4,[R11],#1...|
00003bf0 0f 43 4d 50 20 52 31 31 2c 52 31 32 0d 11 9e 35 |.CMP R11,R12...5|
00003c00 53 55 42 47 45 20 52 31 31 2c 52 31 32 2c 23 73 |SUBGE R11,R12,#s|
00003c10 6f 75 6e 64 5f 62 75 66 5f 73 69 7a 65 25 20 3b |ound_buf_size% ;|
00003c20 20 77 72 61 70 20 74 68 65 20 70 6f 69 6e 74 65 | wrap the pointe|
00003c30 72 0d 11 a8 11 53 55 42 53 20 52 33 2c 52 33 2c |r....SUBS R3,R3,|
00003c40 23 31 0d 11 b2 10 42 48 49 20 73 66 6e 5f 6c 6f |#1....BHI sfn_lo|
00003c50 6f 70 0d 11 bc 16 4c 44 4d 46 44 20 52 31 33 21 |op....LDMFD R13!|
00003c60 2c 7b 52 36 2d 52 37 7d 0d 11 c6 1a 53 54 52 20 |,{R6-R7}....STR |
00003c70 52 32 2c 73 6f 75 6e 64 5f 6e 6f 69 73 65 73 65 |R2,sound_noisese|
00003c80 65 64 0d 11 d0 17 53 54 52 20 52 31 2c 73 6f 75 |ed....STR R1,sou|
00003c90 6e 64 5f 70 69 74 63 68 33 0d 11 da 16 42 20 73 |nd_pitch3....B s|
00003ca0 6f 75 6e 64 5f 66 69 6c 6c 74 6f 5f 65 6e 64 0d |ound_fillto_end.|
00003cb0 11 e4 3b 2e 73 6f 75 6e 64 5f 66 69 6c 6c 74 6f |..;.sound_fillto|
00003cc0 5f 73 70 65 61 63 68 20 20 20 20 20 20 20 20 20 |_speach |
00003cd0 20 3b 20 64 69 72 65 63 74 20 61 6d 70 20 6d 6f | ; direct amp mo|
00003ce0 64 69 66 69 63 61 74 69 6f 6e 0d 11 ee 15 41 44 |dification....AD|
00003cf0 52 20 52 34 2c 73 6f 75 6e 64 5f 61 6d 70 30 0d |R R4,sound_amp0.|
00003d00 11 f8 40 4c 44 52 42 20 52 34 2c 5b 52 34 2c 52 |..@LDRB R4,[R4,R|
00003d10 35 5d 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |5] |
00003d20 20 3b 20 67 65 74 20 42 42 43 20 61 6d 70 20 66 | ; get BBC amp f|
00003d30 6f 72 20 74 68 69 73 20 63 68 61 6e 6e 65 6c 0d |or this channel.|
00003d40 12 02 28 4d 4f 56 20 52 34 2c 52 34 2c 4c 53 4c |..(MOV R4,R4,LSL|
00003d50 23 31 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |#1 |
00003d60 20 3b 20 30 2d 33 30 0d 12 0c 37 53 55 42 53 20 | ; 0-30...7SUBS |
00003d70 52 34 2c 52 34 2c 23 31 35 20 20 20 20 20 20 20 |R4,R4,#15 |
00003d80 20 20 20 20 20 20 20 20 20 3b 20 61 6d 70 6c 69 | ; ampli|
00003d90 74 75 64 65 20 2d 31 35 20 74 6f 20 31 35 0d 12 |tude -15 to 15..|
00003da0 16 0f 4d 4f 56 50 4c 20 52 30 2c 23 30 0d 12 20 |..MOVPL R0,#0.. |
00003db0 2c 4d 4f 56 4d 49 20 52 30 2c 23 31 20 20 20 20 |,MOVMI R0,#1 |
00003dc0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 3b | ;|
00003dd0 20 73 69 67 6e 20 62 69 74 0d 12 2a 32 52 53 42 | sign bit..*2RSB|
00003de0 4d 49 20 52 34 2c 52 34 2c 23 30 20 20 20 20 20 |MI R4,R4,#0 |
00003df0 20 20 20 20 20 20 20 20 20 20 20 3b 20 6e 6f 77 | ; now|
00003e00 20 2b 76 65 20 28 31 2d 31 35 29 0d 12 34 31 4c | +ve (1-15)..41L|
00003e10 44 52 20 52 31 2c 28 73 6f 75 6e 64 5f 62 75 66 |DR R1,(sound_buf|
00003e20 66 73 5f 61 64 64 72 2b 34 29 20 20 20 3b 20 6c |fs_addr+4) ; l|
00003e30 6f 67 20 61 6d 70 20 74 61 62 6c 65 0d 12 3e 2c |og amp table..>,|
00003e40 4c 44 52 42 20 52 34 2c 5b 52 31 2c 52 34 5d 20 |LDRB R4,[R1,R4] |
00003e50 20 20 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 | ; |
00003e60 56 49 44 43 20 61 6d 70 0d 12 48 3c 82 20 52 34 |VIDC amp..H<. R4|
00003e70 2c 52 34 2c 52 30 20 20 20 20 20 20 20 20 20 20 |,R4,R0 |
00003e80 20 20 20 20 20 20 20 20 3b 20 62 75 6e 67 20 69 | ; bung i|
00003e90 6e 20 73 69 67 6e 20 74 6f 20 67 65 74 20 73 61 |n sign to get sa|
00003ea0 6d 70 6c 65 0d 12 52 16 41 44 52 20 52 32 2c 73 |mple..R.ADR R2,s|
00003eb0 6f 75 6e 64 5f 74 69 6d 65 30 0d 12 5c 39 4c 44 |ound_time0..\9LD|
00003ec0 52 20 52 30 2c 5b 52 32 2c 52 35 2c 4c 53 4c 23 |R R0,[R2,R5,LSL#|
00003ed0 32 5d 20 20 20 20 20 20 20 20 20 20 3b 20 67 65 |2] ; ge|
00003ee0 74 20 74 69 6d 65 20 6c 61 73 74 20 75 70 64 61 |t time last upda|
00003ef0 74 65 64 0d 12 66 1a 2e 73 6f 75 6e 64 5f 66 69 |ted..f..sound_fi|
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00003f10 14 53 54 52 42 20 52 34 2c 5b 52 31 31 5d 2c 23 |.STRB R4,[R11],#|
00003f20 31 0d 12 7a 11 53 55 42 20 52 30 2c 52 30 2c 23 |1..z.SUB R0,R0,#|
00003f30 39 36 0d 12 84 0f 43 4d 50 20 52 31 31 2c 52 31 |96....CMP R11,R1|
00003f40 32 0d 12 8e 35 53 55 42 47 45 20 52 31 31 2c 52 |2...5SUBGE R11,R|
00003f50 31 32 2c 23 73 6f 75 6e 64 5f 62 75 66 5f 73 69 |12,#sound_buf_si|
00003f60 7a 65 25 20 3b 20 77 72 61 70 20 74 68 65 20 70 |ze% ; wrap the p|
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00003f90 6f 75 6e 64 5f 66 69 6c 6c 74 6f 5f 73 70 65 61 |ound_fillto_spea|
00003fa0 63 68 5f 31 0d 12 ac 19 3b 53 54 52 20 52 30 2c |ch_1....;STR R0,|
00003fb0 5b 52 32 2c 52 35 2c 4c 53 4c 23 32 5d 0d 12 b6 |[R2,R5,LSL#2]...|
00003fc0 16 42 20 73 6f 75 6e 64 5f 66 69 6c 6c 74 6f 5f |.B sound_fillto_|
00003fd0 65 6e 64 0d 12 c0 3b 2e 73 6f 75 6e 64 5f 6e 6f |end...;.sound_no|
00003fe0 69 73 65 73 65 65 64 20 45 51 55 44 20 26 34 34 |iseseed EQUD &44|
00003ff0 36 44 36 39 35 34 20 3b 20 77 68 69 74 65 20 6e |6D6954 ; white n|
00004000 6f 69 73 65 20 73 65 65 64 20 28 52 32 29 0d 12 |oise seed (R2)..|
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00004020 72 20 20 45 51 55 44 20 26 38 32 44 34 45 31 42 |r EQUD &82D4E1B|
00004030 38 20 3b 20 77 68 69 74 65 20 6e 6f 69 73 65 20 |8 ; white noise |
00004040 65 6f 72 20 28 52 36 29 0d 12 d4 04 0d 12 de 37 |eor (R6).......7|
00004050 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b |;;;;;;;;;;;;;;;;|
*
00004080 3b 3b 3b 0d 12 e8 37 3b 20 56 6f 69 63 65 20 67 |;;;...7; Voice g|
00004090 65 6e 65 72 61 74 6f 72 20 20 20 20 20 20 20 20 |enerator |
000040a0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000040b0 20 20 20 20 20 20 20 20 20 3b 0d 12 f2 37 3b 3b | ;...7;;|
000040c0 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b |;;;;;;;;;;;;;;;;|
*
000040f0 3b 0d 12 fc 04 0d 13 06 15 2e 73 6f 75 6e 64 5f |;.........sound_|
00004100 62 75 66 66 73 5f 61 64 64 72 0d 13 10 35 45 51 |buffs_addr...5EQ|
00004110 55 44 20 30 20 20 20 20 20 20 20 20 20 20 20 20 |UD 0 |
00004120 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 61 64 | ; ad|
00004130 64 72 65 73 73 20 6f 66 20 62 75 66 66 65 72 0d |dress of buffer.|
00004140 13 1a 30 45 51 55 44 20 30 20 20 20 20 20 20 20 |..0EQUD 0 |
00004150 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00004160 20 3b 20 76 6f 6c 75 6d 65 20 74 61 62 6c 65 0d | ; volume table.|
00004170 13 24 32 45 51 55 44 20 30 20 20 20 20 20 20 20 |.$2EQUD 0 |
00004180 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00004190 20 3b 20 73 61 6d 70 6c 65 20 61 64 64 72 65 73 | ; sample addres|
000041a0 73 0d 13 2e 31 45 51 55 44 20 30 20 20 20 20 20 |s...1EQUD 0 |
000041b0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000041c0 20 20 20 3b 20 73 74 61 63 6b 20 61 64 64 72 65 | ; stack addre|
000041d0 73 73 0d 13 38 04 0d 13 42 0a 3b 20 53 43 43 42 |ss..8...B.; SCCB|
000041e0 0d 13 4c 1e 3b 20 23 30 20 62 30 2d 62 37 20 41 |..L.; #0 b0-b7 A|
000041f0 72 63 20 76 6f 6c 75 6d 65 20 28 52 31 29 0d 13 |rc volume (R1)..|
00004200 56 2c 3b 20 23 34 20 70 68 61 73 65 20 61 63 63 |V,; #4 phase acc|
00004210 75 6d 75 6c 61 74 6f 72 20 28 62 30 2d 62 31 35 |umulator (b0-b15|
00004220 3d 69 6e 63 29 20 28 52 32 29 0d 13 60 0a 3b 20 |=inc) (R2)..`.; |
00004230 23 38 20 2d 0d 13 6a 30 3b 20 23 31 32 20 6e 75 |#8 -..j0; #12 nu|
00004240 6d 62 65 72 20 6f 66 20 62 75 66 66 65 72 20 66 |mber of buffer f|
00004250 69 6c 6c 73 20 6c 65 66 74 20 74 6f 20 64 6f 20 |ills left to do |
00004260 28 52 34 29 0d 13 74 27 3b 20 23 31 36 20 62 62 |(R4)..t'; #16 bb|
00004270 63 20 63 68 61 6e 6e 65 6c 20 6e 75 6d 62 65 72 |c channel number|
00004280 20 28 30 2d 33 29 20 28 52 35 29 0d 13 7e 2a 3b | (0-3) (R5)..~*;|
00004290 20 23 32 30 20 56 6f 6c 75 6d 65 20 73 63 61 6c | #20 Volume scal|
000042a0 65 64 20 6c 6f 67 20 61 6d 70 20 74 61 62 6c 65 |ed log amp table|
000042b0 20 28 52 36 29 0d 13 88 04 0d 13 92 16 2e 73 6f | (R6).........so|
000042c0 75 6e 64 5f 76 6f 69 63 65 68 65 61 64 65 72 0d |und_voiceheader.|
000042d0 13 9c 11 42 20 73 6f 75 6e 64 5f 76 66 69 6c 6c |...B sound_vfill|
000042e0 0d 13 a6 11 42 20 73 6f 75 6e 64 5f 76 66 69 6c |....B sound_vfil|
000042f0 6c 0d 13 b0 11 42 20 73 6f 75 6e 64 5f 76 66 69 |l....B sound_vfi|
00004300 6c 6c 0d 13 ba 14 42 20 73 6f 75 6e 64 5f 76 67 |ll....B sound_vg|
00004310 61 74 65 6f 66 66 0d 13 c4 18 42 20 73 6f 75 6e |ateoff....B soun|
00004320 64 5f 76 69 6e 73 74 61 6e 74 69 61 74 65 0d 13 |d_vinstantiate..|
00004330 ce 13 4c 44 4d 46 44 20 52 31 33 21 2c 7b 50 43 |..LDMFD R13!,{PC|
00004340 7d 0d 13 d8 13 4c 44 4d 46 44 20 52 31 33 21 2c |}....LDMFD R13!,|
00004350 7b 50 43 7d 0d 13 e2 2a 45 51 55 44 20 73 6f 75 |{PC}...*EQUD sou|
00004360 6e 64 5f 76 6f 69 63 65 6e 61 6d 65 2d 73 6f 75 |nd_voicename-sou|
00004370 6e 64 5f 76 6f 69 63 65 68 65 61 64 65 72 0d 13 |nd_voiceheader..|
00004380 ec 14 2e 73 6f 75 6e 64 5f 76 6f 69 63 65 6e 61 |...sound_voicena|
00004390 6d 65 0d 13 f6 1a 45 51 55 53 20 22 36 35 30 32 |me....EQUS "6502|
000043a0 45 6d 75 6c 61 74 6f 72 22 2b bd 30 0d 14 00 09 |Emulator"+.0....|
000043b0 41 4c 49 47 4e 0d 14 0a 04 0d 14 14 1e 3b 45 20 |ALIGN........;E |
000043c0 52 65 74 75 72 6e 20 61 64 64 72 65 73 73 20 6f |Return address o|
000043d0 6e 20 73 74 61 63 6b 0d 14 1e 23 3b 20 20 52 31 |n stack...#; R1|
000043e0 34 20 6e 6f 74 20 75 73 61 62 6c 65 20 28 69 6e |4 not usable (in|
000043f0 20 49 52 51 20 6d 6f 64 65 29 0d 14 28 04 0d 14 | IRQ mode)..(...|
00004400 32 10 2e 73 6f 75 6e 64 5f 76 66 69 6c 6c 0d 14 |2..sound_vfill..|
00004410 3c 39 4c 44 4d 46 44 20 52 39 2c 7b 52 31 2d 52 |<9LDMFD R9,{R1-R|
00004420 36 7d 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |6} |
00004430 3b 20 52 35 3d 62 62 63 20 63 68 61 6e 6e 65 6c |; R5=bbc channel|
00004440 20 6e 75 6d 62 65 72 0d 14 46 16 41 44 52 20 52 | number..F.ADR R|
00004450 31 2c 73 6f 75 6e 64 5f 72 65 61 64 30 0d 14 50 |1,sound_read0..P|
00004460 39 4c 44 52 20 52 32 2c 5b 52 31 2c 52 35 2c 4c |9LDR R2,[R1,R5,L|
00004470 53 4c 23 32 5d 20 20 20 20 20 20 20 20 20 20 3b |SL#2] ;|
00004480 20 6f 66 66 73 65 74 20 6f 66 20 75 6e 72 65 61 | offset of unrea|
00004490 64 20 64 61 74 61 0d 14 5a 18 41 44 52 20 52 31 |d data..Z.ADR R1|
000044a0 2c 73 6f 75 6e 64 5f 66 69 6c 6c 65 64 30 0d 14 |,sound_filled0..|
000044b0 64 3b 4c 44 52 20 52 30 2c 5b 52 31 2c 52 35 2c |d;LDR R0,[R1,R5,|
000044c0 4c 53 4c 23 32 5d 20 20 20 20 20 20 20 20 20 20 |LSL#2] |
000044d0 3b 20 6f 66 66 73 65 74 20 62 75 66 66 65 72 20 |; offset buffer |
000044e0 66 69 6c 6c 65 64 20 74 6f 0d 14 6e 11 53 55 42 |filled to..n.SUB|
000044f0 53 20 52 30 2c 52 30 2c 52 32 0d 14 78 38 41 44 |S R0,R0,R2..x8AD|
00004500 44 4d 49 20 52 30 2c 52 30 2c 23 73 6f 75 6e 64 |DMI R0,R0,#sound|
00004510 5f 62 75 66 5f 73 69 7a 65 25 20 20 3b 20 61 6d |_buf_size% ; am|
00004520 6f 75 6e 74 20 69 6e 20 74 68 65 20 62 75 66 66 |ount in the buff|
00004530 65 72 0d 14 82 37 52 53 42 53 20 52 30 2c 52 30 |er...7RSBS R0,R0|
00004540 2c 23 32 30 38 20 20 20 20 20 20 20 20 20 20 20 |,#208 |
00004550 20 20 20 20 3b 20 61 6d 6f 75 6e 74 20 65 78 74 | ; amount ext|
00004560 72 61 20 6e 65 65 64 65 64 0d 14 8c 16 42 4c 45 |ra needed....BLE|
00004570 20 73 6f 75 6e 64 5f 66 69 6c 6c 5f 72 65 74 0d | sound_fill_ret.|
00004580 14 96 19 41 44 52 20 52 31 2c 73 6f 75 6e 64 5f |...ADR R1,sound_|
00004590 66 69 6c 6c 5f 72 65 74 0d 14 a0 3f 53 54 4d 46 |fill_ret...?STMF|
000045a0 44 20 52 31 33 21 2c 7b 52 31 7d 20 20 20 20 20 |D R13!,{R1} |
000045b0 20 20 20 20 20 20 20 20 20 20 3b 20 70 75 74 20 | ; put |
000045c0 72 65 74 75 72 6e 20 61 64 64 72 65 73 73 20 6f |return address o|
000045d0 6e 20 73 74 61 63 6b 0d 14 aa 41 42 20 73 6f 75 |n stack...AB sou|
000045e0 6e 64 5f 66 69 6c 6c 74 6f 20 20 20 20 20 20 20 |nd_fillto |
000045f0 20 20 20 20 20 20 20 20 20 3b 20 65 6e 73 75 72 | ; ensur|
00004600 65 20 74 68 65 20 62 75 66 66 65 72 20 66 75 6c |e the buffer ful|
00004610 6c 20 65 6e 6f 75 67 68 0d 14 b4 13 2e 73 6f 75 |l enough.....sou|
00004620 6e 64 5f 66 69 6c 6c 5f 72 65 74 0d 14 be 16 41 |nd_fill_ret....A|
00004630 44 52 20 52 31 2c 73 6f 75 6e 64 5f 72 65 61 64 |DR R1,sound_read|
00004640 30 0d 14 c8 36 4c 44 52 20 52 30 2c 5b 52 31 2c |0...6LDR R0,[R1,|
00004650 52 35 2c 4c 53 4c 23 32 5d 20 20 20 20 20 20 20 |R5,LSL#2] |
00004660 20 20 20 3b 20 6f 66 66 20 6f 66 20 75 6e 72 65 | ; off of unre|
00004670 61 64 20 64 61 74 61 0d 14 d2 43 41 44 44 20 52 |ad data...CADD R|
00004680 32 2c 52 30 2c 23 32 30 38 20 20 20 20 20 20 20 |2,R0,#208 |
00004690 20 20 20 20 20 20 20 20 20 3b 20 6e 65 77 20 6f | ; new o|
000046a0 66 66 73 65 74 20 61 66 74 65 72 20 77 65 27 76 |ffset after we'v|
000046b0 65 20 66 69 6e 69 73 68 65 64 0d 14 dc 1b 43 4d |e finished....CM|
000046c0 50 20 52 32 2c 23 73 6f 75 6e 64 5f 62 75 66 5f |P R2,#sound_buf_|
000046d0 73 69 7a 65 25 0d 14 e6 2b 53 55 42 47 45 20 52 |size%...+SUBGE R|
000046e0 32 2c 52 32 2c 23 73 6f 75 6e 64 5f 62 75 66 5f |2,R2,#sound_buf_|
000046f0 73 69 7a 65 25 20 20 3b 20 77 72 61 70 20 69 74 |size% ; wrap it|
00004700 0d 14 f0 18 53 54 52 20 52 32 2c 5b 52 31 2c 52 |....STR R2,[R1,R|
00004710 35 2c 4c 53 4c 23 32 5d 0d 14 fa 1b 4c 44 52 20 |5,LSL#2]....LDR |
00004720 52 32 2c 73 6f 75 6e 64 5f 62 75 66 66 73 5f 61 |R2,sound_buffs_a|
00004730 64 64 72 0d 15 04 3c 41 44 44 20 52 32 2c 52 32 |ddr...<ADD R2,R2|
00004740 2c 52 35 2c 4c 53 4c 23 73 6f 75 6e 64 5f 62 75 |,R5,LSL#sound_bu|
00004750 66 5f 73 69 7a 65 5f 6c 6f 67 25 20 3b 20 61 64 |f_size_log% ; ad|
00004760 64 72 65 73 73 20 6f 66 20 62 75 66 66 65 72 0d |dress of buffer.|
00004770 15 0e 31 41 44 44 20 52 33 2c 52 32 2c 23 73 6f |..1ADD R3,R2,#so|
00004780 75 6e 64 5f 62 75 66 5f 73 69 7a 65 25 20 20 20 |und_buf_size% |
00004790 20 3b 20 65 6e 64 20 6f 66 20 62 75 66 66 65 72 | ; end of buffer|
000047a0 0d 15 18 33 41 44 44 20 52 32 2c 52 32 2c 52 30 |...3ADD R2,R2,R0|
000047b0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000047c0 20 20 3b 20 63 75 72 72 65 6e 74 20 61 64 64 72 | ; current addr|
000047d0 65 73 73 0d 15 22 39 2e 73 6f 75 6e 64 5f 66 69 |ess.."9.sound_fi|
000047e0 6c 6c 5f 6c 6f 6f 70 20 20 20 20 20 20 20 20 20 |ll_loop |
000047f0 20 20 20 20 20 3b 20 4e 42 20 41 6d 70 20 61 6c | ; NB Amp al|
00004800 72 65 61 64 79 20 73 63 61 6c 65 64 0d 15 2c 31 |ready scaled..,1|
00004810 4c 44 52 42 20 52 30 2c 5b 52 32 5d 2c 23 31 20 |LDRB R0,[R2],#1 |
00004820 20 20 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 | ; |
00004830 67 65 74 20 6e 65 78 74 20 62 79 74 65 0d 15 36 |get next byte..6|
00004840 15 53 54 52 42 20 52 30 2c 5b 52 31 32 5d 2c 52 |.STRB R0,[R12],R|
00004850 31 31 0d 15 40 0d 43 4d 50 20 52 32 2c 52 33 0d |11..@.CMP R2,R3.|
00004860 15 4a 20 53 55 42 47 45 20 52 32 2c 52 33 2c 23 |.J SUBGE R2,R3,#|
00004870 73 6f 75 6e 64 5f 62 75 66 5f 73 69 7a 65 25 0d |sound_buf_size%.|
00004880 15 54 31 4c 44 52 42 20 52 30 2c 5b 52 32 5d 2c |.T1LDRB R0,[R2],|
00004890 23 31 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |#1 |
000048a0 20 3b 20 67 65 74 20 6e 65 78 74 20 62 79 74 65 | ; get next byte|
000048b0 0d 15 5e 15 53 54 52 42 20 52 30 2c 5b 52 31 32 |..^.STRB R0,[R12|
000048c0 5d 2c 52 31 31 0d 15 68 0d 43 4d 50 20 52 32 2c |],R11..h.CMP R2,|
000048d0 52 33 0d 15 72 20 53 55 42 47 45 20 52 32 2c 52 |R3..r SUBGE R2,R|
000048e0 33 2c 23 73 6f 75 6e 64 5f 62 75 66 5f 73 69 7a |3,#sound_buf_siz|
000048f0 65 25 0d 15 7c 31 4c 44 52 42 20 52 30 2c 5b 52 |e%..|1LDRB R0,[R|
00004900 32 5d 2c 23 31 20 20 20 20 20 20 20 20 20 20 20 |2],#1 |
00004910 20 20 20 20 3b 20 67 65 74 20 6e 65 78 74 20 62 | ; get next b|
00004920 79 74 65 0d 15 86 15 53 54 52 42 20 52 30 2c 5b |yte....STRB R0,[|
00004930 52 31 32 5d 2c 52 31 31 0d 15 90 0d 43 4d 50 20 |R12],R11....CMP |
00004940 52 32 2c 52 33 0d 15 9a 20 53 55 42 47 45 20 52 |R2,R3... SUBGE R|
00004950 32 2c 52 33 2c 23 73 6f 75 6e 64 5f 62 75 66 5f |2,R3,#sound_buf_|
00004960 73 69 7a 65 25 0d 15 a4 31 4c 44 52 42 20 52 30 |size%...1LDRB R0|
00004970 2c 5b 52 32 5d 2c 23 31 20 20 20 20 20 20 20 20 |,[R2],#1 |
00004980 20 20 20 20 20 20 20 3b 20 67 65 74 20 6e 65 78 | ; get nex|
00004990 74 20 62 79 74 65 0d 15 ae 15 53 54 52 42 20 52 |t byte....STRB R|
000049a0 30 2c 5b 52 31 32 5d 2c 52 31 31 0d 15 b8 0d 43 |0,[R12],R11....C|
000049b0 4d 50 20 52 32 2c 52 33 0d 15 c2 20 53 55 42 47 |MP R2,R3... SUBG|
000049c0 45 20 52 32 2c 52 33 2c 23 73 6f 75 6e 64 5f 62 |E R2,R3,#sound_b|
000049d0 75 66 5f 73 69 7a 65 25 0d 15 cc 0f 43 4d 50 20 |uf_size%....CMP |
000049e0 52 31 32 2c 52 31 30 0d 15 d6 17 42 4c 54 20 73 |R12,R10....BLT s|
000049f0 6f 75 6e 64 5f 66 69 6c 6c 5f 6c 6f 6f 70 0d 15 |ound_fill_loop..|
00004a00 e0 36 4d 4f 56 20 52 30 2c 23 38 20 20 20 20 20 |.6MOV R0,#8 |
00004a10 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00004a20 3b 20 76 6f 69 63 65 20 73 74 69 6c 6c 20 61 63 |; voice still ac|
00004a30 74 69 76 65 0d 15 ea 13 4c 44 4d 46 44 20 52 31 |tive....LDMFD R1|
00004a40 33 21 2c 7b 50 43 7d 0d 15 f4 04 0d 15 fe 37 3b |3!,{PC}.......7;|
00004a50 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b |;;;;;;;;;;;;;;;;|
*
00004a80 3b 3b 0d 16 08 37 3b 20 70 72 69 6e 74 20 6f 75 |;;...7; print ou|
00004a90 74 20 64 65 62 75 67 20 64 61 74 61 20 2d 20 63 |t debug data - c|
00004aa0 75 72 72 65 6e 74 20 63 68 61 6e 6e 65 6c 20 73 |urrent channel s|
00004ab0 65 74 74 69 6e 67 73 20 3b 0d 16 12 37 3b 3b 3b |ettings ;...7;;;|
00004ac0 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b |;;;;;;;;;;;;;;;;|
*
00004af0 0d 16 1c 04 0d 16 26 1f 3b 58 20 52 31 3d 63 68 |......&.;X R1=ch|
00004b00 61 6e 6e 65 6c 20 62 65 69 6e 67 20 63 68 61 6e |annel being chan|
00004b10 67 65 64 0d 16 30 04 0d 16 3a 10 2e 73 6f 75 6e |ged..0...:..soun|
00004b20 64 5f 64 65 62 75 67 0d 16 44 1a 53 54 4d 46 44 |d_debug..D.STMFD|
00004b30 20 52 31 33 21 2c 7b 52 30 2d 52 31 2c 52 31 34 | R13!,{R0-R1,R14|
00004b40 7d 0d 16 4e 0c 53 57 49 20 26 31 31 46 0d 16 58 |}..N.SWI &11F..X|
00004b50 0c 53 57 49 20 26 31 30 30 0d 16 62 0d 4d 4f 56 |.SWI &100..b.MOV|
00004b60 20 52 30 2c 52 31 0d 16 6c 31 53 57 49 20 22 58 | R0,R1..l1SWI "X|
00004b70 4f 53 5f 57 72 69 74 65 43 22 20 20 20 20 20 20 |OS_WriteC" |
00004b80 20 20 20 20 20 20 20 20 3b 20 6a 75 6d 70 20 74 | ; jump t|
00004b90 6f 20 72 6f 77 20 6e 0d 16 76 0d 4d 4f 56 20 52 |o row n..v.MOV R|
00004ba0 30 2c 52 31 0d 16 80 2b 42 4c 20 73 6f 75 6e 64 |0,R1...+BL sound|
00004bb0 5f 64 65 62 75 67 32 20 20 20 20 20 20 20 20 20 |_debug2 |
00004bc0 20 20 20 20 20 20 3b 20 63 68 61 6e 6e 65 6c 0d | ; channel.|
00004bd0 16 8a 17 41 44 52 20 52 31 34 2c 73 6f 75 6e 64 |...ADR R14,sound|
00004be0 5f 66 72 65 71 30 0d 16 94 19 4c 44 52 20 52 30 |_freq0....LDR R0|
00004bf0 2c 5b 52 31 34 2c 52 31 2c 4c 53 4c 23 32 5d 0d |,[R14,R1,LSL#2].|
00004c00 16 9e 28 42 4c 20 73 6f 75 6e 64 5f 64 65 62 75 |..(BL sound_debu|
00004c10 67 32 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |g2 |
00004c20 20 3b 20 66 72 65 71 0d 16 a8 16 41 44 52 20 52 | ; freq....ADR R|
00004c30 31 34 2c 73 6f 75 6e 64 5f 61 6d 70 30 0d 16 b2 |14,sound_amp0...|
00004c40 14 4c 44 52 42 20 52 30 2c 5b 52 31 34 2c 52 31 |.LDRB R0,[R14,R1|
00004c50 5d 0d 16 bc 27 42 4c 20 73 6f 75 6e 64 5f 64 65 |]...'BL sound_de|
00004c60 62 75 67 32 20 20 20 20 20 20 20 20 20 20 20 20 |bug2 |
00004c70 20 20 20 3b 20 61 6d 70 0d 16 c6 19 4c 44 4d 46 | ; amp....LDMF|
00004c80 44 20 52 31 33 21 2c 7b 52 30 2d 52 31 2c 50 43 |D R13!,{R0-R1,PC|
00004c90 7d 0d 16 d0 04 0d 16 da 05 5d 0d 16 e4 07 3d 22 |}........]....="|
00004ca0 22 0d 16 ee 04 0d 16 f8 10 f4 20 4d 49 53 43 20 |"......... MISC |
00004cb0 53 54 55 46 46 0d 17 02 04 0d 17 0c 11 dd 20 a4 |STUFF......... .|
00004cc0 73 6f 75 6e 64 5f 6d 69 73 63 0d 17 16 0a 5b 4f |sound_misc....[O|
00004cd0 50 54 20 70 0d 17 20 04 0d 17 2a 19 3b 45 20 52 |PT p.. ...*.;E R|
00004ce0 30 3d 6e 75 6d 62 65 72 20 74 6f 20 70 72 69 6e |0=number to prin|
00004cf0 74 0d 17 34 15 3b 58 20 4e 75 6d 62 65 72 20 70 |t..4.;X Number p|
00004d00 72 69 6e 74 65 64 0d 17 3e 04 0d 17 48 36 2e 73 |rinted..>...H6.s|
00004d10 6f 75 6e 64 5f 64 65 62 75 67 32 20 20 20 20 20 |ound_debug2 |
00004d20 20 20 3b 20 6f 75 74 70 75 74 20 6e 75 6d 62 65 | ; output numbe|
00004d30 72 20 69 6e 20 52 30 20 74 6f 20 64 65 62 75 67 |r in R0 to debug|
00004d40 0d 17 52 1a 53 54 4d 46 44 20 52 31 33 21 2c 7b |..R.STMFD R13!,{|
00004d50 52 30 2d 52 32 2c 52 31 34 7d 0d 17 5c 1a 41 44 |R0-R2,R14}..\.AD|
00004d60 52 20 52 31 2c 73 6f 75 6e 64 5f 64 65 62 75 67 |R R1,sound_debug|
00004d70 5f 62 75 66 0d 17 66 0e 4d 4f 56 20 52 32 2c 23 |_buf..f.MOV R2,#|
00004d80 31 36 0d 17 70 19 53 57 49 20 22 58 4f 53 5f 43 |16..p.SWI "XOS_C|
00004d90 6f 6e 76 65 72 74 48 65 78 38 22 0d 17 7a 14 53 |onvertHex8"..z.S|
00004da0 57 49 20 22 58 4f 53 5f 57 72 69 74 65 30 22 0d |WI "XOS_Write0".|
00004db0 17 84 0c 53 57 49 20 26 31 32 30 0d 17 8e 19 4c |...SWI &120....L|
00004dc0 44 4d 46 44 20 52 31 33 21 2c 7b 52 30 2d 52 32 |DMFD R13!,{R0-R2|
00004dd0 2c 50 43 7d 0d 17 98 14 2e 73 6f 75 6e 64 5f 64 |,PC}.....sound_d|
00004de0 65 62 75 67 5f 62 75 66 0d 17 a2 12 a4 73 6f 75 |ebug_buf.....sou|
00004df0 6e 64 5f 6d 65 6d 28 31 36 29 0d 17 ac 04 0d 17 |nd_mem(16)......|
00004e00 b6 20 3b 45 20 52 30 3d 63 68 61 6e 6e 65 6c 20 |. ;E R0=channel |
00004e10 6e 75 6d 62 65 72 2d 31 20 28 30 2d 37 29 0d 17 |number-1 (0-7)..|
00004e20 c0 25 3b 20 20 52 65 74 75 72 6e 20 61 64 64 72 |.%; Return addr|
00004e30 65 73 73 20 6f 6e 20 74 6f 70 20 6f 66 20 73 74 |ess on top of st|
00004e40 61 63 6b 0d 17 ca 04 0d 17 d4 17 2e 73 6f 75 6e |ack.........soun|
00004e50 64 5f 76 69 6e 73 74 61 6e 74 69 61 74 65 0d 17 |d_vinstantiate..|
00004e60 de 16 53 54 4d 46 44 20 52 31 33 21 2c 7b 52 30 |..STMFD R13!,{R0|
00004e70 2d 52 35 7d 0d 17 e8 37 4d 4f 56 20 52 35 2c 52 |-R5}...7MOV R5,R|
00004e80 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |0 |
00004e90 20 20 20 20 20 20 3b 20 73 61 76 65 20 63 68 61 | ; save cha|
00004ea0 6e 6e 65 6c 20 6e 75 6d 62 65 72 0d 17 f2 0d 4d |nnel number....M|
00004eb0 4f 56 20 52 30 2c 23 30 0d 17 fc 0d 4d 4f 56 20 |OV R0,#0....MOV |
00004ec0 52 31 2c 23 30 0d 18 06 0d 4d 4f 56 20 52 32 2c |R1,#0....MOV R2,|
00004ed0 23 30 0d 18 10 0d 4d 4f 56 20 52 33 2c 23 30 0d |#0....MOV R3,#0.|
00004ee0 18 1a 0d 4d 4f 56 20 52 34 2c 23 30 0d 18 24 1a |...MOV R4,#0..$.|
00004ef0 53 57 49 20 22 58 53 6f 75 6e 64 5f 43 6f 6e 66 |SWI "XSound_Conf|
00004f00 69 67 75 72 65 22 0d 18 2e 32 41 44 44 20 52 30 |igure"...2ADD R0|
00004f10 2c 52 35 2c 23 31 20 20 20 20 20 20 20 20 20 20 |,R5,#1 |
00004f20 20 20 20 20 20 20 20 20 3b 20 63 68 61 6e 6e 65 | ; channe|
00004f30 6c 20 6e 75 6d 62 65 72 0d 18 38 0e 4d 4f 56 20 |l number..8.MOV |
00004f40 52 31 2c 23 32 30 0d 18 42 13 4c 44 52 20 52 32 |R1,#20..B.LDR R2|
00004f50 2c 5b 52 33 2c 23 31 32 5d 0d 18 4c 43 53 57 49 |,[R3,#12]..LCSWI|
00004f60 20 22 58 53 6f 75 6e 64 5f 57 72 69 74 65 43 6f | "XSound_WriteCo|
00004f70 6e 74 72 6f 6c 42 6c 6f 63 6b 22 20 20 20 20 20 |ntrolBlock" |
00004f80 20 20 20 20 20 3b 20 76 6f 6c 75 6d 65 20 73 63 | ; volume sc|
00004f90 61 6c 65 64 20 6c 6f 67 20 61 6d 70 0d 18 56 10 |aled log amp..V.|
00004fa0 41 44 44 20 52 30 2c 52 35 2c 23 31 0d 18 60 0e |ADD R0,R5,#1..`.|
00004fb0 4d 4f 56 20 52 31 2c 23 31 36 0d 18 6a 36 4d 4f |MOV R1,#16..j6MO|
00004fc0 56 20 52 32 2c 52 35 20 20 20 20 20 20 20 20 20 |V R2,R5 |
00004fd0 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 62 62 | ; bb|
00004fe0 63 20 63 68 61 6e 6e 65 6c 20 6e 75 6d 62 65 72 |c channel number|
00004ff0 0d 18 74 0d 43 4d 50 20 52 32 2c 23 34 0d 18 7e |..t.CMP R2,#4..~|
00005000 28 4d 4f 56 43 53 20 52 32 2c 23 30 20 20 20 20 |(MOVCS R2,#0 |
00005010 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 3b | ;|
00005020 20 63 6c 69 70 0d 18 88 22 53 57 49 20 22 58 53 | clip..."SWI "XS|
00005030 6f 75 6e 64 5f 57 72 69 74 65 43 6f 6e 74 72 6f |ound_WriteContro|
00005040 6c 42 6c 6f 63 6b 22 0d 18 92 19 4c 44 4d 46 44 |lBlock"....LDMFD|
00005050 20 52 31 33 21 2c 7b 52 30 2d 52 35 2c 50 43 7d | R13!,{R0-R5,PC}|
00005060 0d 18 9c 04 0d 18 a6 13 2e 73 6f 75 6e 64 5f 76 |.........sound_v|
00005070 67 61 74 65 6f 66 66 0d 18 b0 0d 4d 4f 56 20 52 |gateoff....MOV R|
00005080 30 2c 23 30 0d 18 ba 17 2e 73 6f 75 6e 64 5f 67 |0,#0.....sound_g|
00005090 61 74 65 6f 66 66 5f 6c 6f 6f 70 0d 18 c4 15 53 |ateoff_loop....S|
000050a0 54 52 42 20 52 30 2c 5b 52 31 32 5d 2c 52 31 31 |TRB R0,[R12],R11|
000050b0 0d 18 ce 16 53 54 52 42 20 52 30 2c 5b 52 31 32 |....STRB R0,[R12|
000050c0 5d 2c 52 31 31 20 0d 18 d8 15 53 54 52 42 20 52 |],R11 ....STRB R|
000050d0 30 2c 5b 52 31 32 5d 2c 52 31 31 0d 18 e2 15 53 |0,[R12],R11....S|
000050e0 54 52 42 20 52 30 2c 5b 52 31 32 5d 2c 52 31 31 |TRB R0,[R12],R11|
000050f0 0d 18 ec 0f 43 4d 50 20 52 31 32 2c 52 31 30 0d |....CMP R12,R10.|
00005100 18 f6 1a 42 4c 54 20 73 6f 75 6e 64 5f 67 61 74 |...BLT sound_gat|
00005110 65 6f 66 66 5f 6c 6f 6f 70 0d 19 00 0d 4d 4f 56 |eoff_loop....MOV|
00005120 20 52 30 2c 23 31 0d 19 0a 13 4c 44 4d 46 44 20 | R0,#1....LDMFD |
00005130 52 31 33 21 2c 7b 50 43 7d 0d 19 14 04 0d 19 1e |R13!,{PC}.......|
00005140 37 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b |7;;;;;;;;;;;;;;;|
00005150 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b |;;;;;;;;;;;;;;;;|
*
00005170 3b 3b 3b 3b 0d 19 28 37 3b 20 44 69 76 69 64 65 |;;;;..(7; Divide|
00005180 20 72 6f 75 74 69 6e 65 20 20 20 20 20 20 20 20 | routine |
00005190 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000051a0 20 20 20 20 20 20 20 20 20 20 3b 0d 19 32 37 3b | ;..27;|
000051b0 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b 3b |;;;;;;;;;;;;;;;;|
*
000051e0 3b 3b 0d 19 3c 04 0d 19 46 24 5c 45 20 52 30 3d |;;..<...F$\E R0=|
000051f0 6e 75 6d 65 72 61 74 6f 72 20 20 20 52 31 3d 64 |numerator R1=d|
00005200 65 6e 6f 6d 69 6e 61 74 6f 72 0d 19 50 37 5c 58 |enominator..P7\X|
00005210 20 52 30 3d 52 30 20 44 69 76 20 52 31 20 20 20 | R0=R0 Div R1 |
00005220 52 32 3d 52 30 20 4d 6f 64 20 52 31 20 20 20 20 |R2=R0 Mod R1 |
00005230 52 30 2d 52 33 20 63 6f 72 72 75 70 74 65 64 20 |R0-R3 corrupted |
00005240 7c 0d 19 5a 04 0d 19 64 0c 2e 64 69 76 5f 6d 6f ||..Z...d..div_mo|
00005250 64 0d 19 6e 33 4d 4f 56 20 52 32 2c 23 30 20 20 |d..n3MOV R2,#0 |
00005260 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00005270 20 20 20 5c 20 63 6c 65 61 72 20 72 65 6d 61 69 | \ clear remai|
00005280 6e 64 65 72 0d 19 78 34 41 44 44 53 20 52 30 2c |nder..x4ADDS R0,|
00005290 52 30 2c 52 30 20 20 20 20 20 20 20 20 20 20 20 |R0,R0 |
000052a0 20 20 20 20 20 20 5c 20 64 6f 75 62 6c 65 20 6e | \ double n|
000052b0 75 6d 65 72 61 74 6f 72 0d 19 82 30 52 53 42 20 |umerator...0RSB |
000052c0 52 31 2c 52 31 2c 23 30 20 20 20 20 20 20 20 20 |R1,R1,#0 |
000052d0 20 20 20 20 20 20 20 20 20 20 5c 20 6e 65 67 61 | \ nega|
000052e0 74 65 20 64 65 6e 6f 6d 0d 19 8c 0e 4d 4f 56 20 |te denom....MOV |
000052f0 52 33 2c 23 33 32 0d 19 96 0e 2e 64 69 76 5f 6d |R3,#32.....div_m|
00005300 6f 64 5f 31 0d 19 a0 34 41 44 43 53 20 52 32 2c |od_1...4ADCS R2,|
00005310 52 31 2c 52 32 2c 4c 53 4c 23 31 3a 53 55 42 43 |R1,R2,LSL#1:SUBC|
00005320 43 20 52 32 2c 52 32 2c 52 31 3a 41 44 43 53 20 |C R2,R2,R1:ADCS |
00005330 52 30 2c 52 30 2c 52 30 0d 19 aa 34 41 44 43 53 |R0,R0,R0...4ADCS|
00005340 20 52 32 2c 52 31 2c 52 32 2c 4c 53 4c 23 31 3a | R2,R1,R2,LSL#1:|
00005350 53 55 42 43 43 20 52 32 2c 52 32 2c 52 31 3a 41 |SUBCC R2,R2,R1:A|
00005360 44 43 53 20 52 30 2c 52 30 2c 52 30 0d 19 b4 34 |DCS R0,R0,R0...4|
00005370 41 44 43 53 20 52 32 2c 52 31 2c 52 32 2c 4c 53 |ADCS R2,R1,R2,LS|
00005380 4c 23 31 3a 53 55 42 43 43 20 52 32 2c 52 32 2c |L#1:SUBCC R2,R2,|
00005390 52 31 3a 41 44 43 53 20 52 30 2c 52 30 2c 52 30 |R1:ADCS R0,R0,R0|
000053a0 0d 19 be 34 41 44 43 53 20 52 32 2c 52 31 2c 52 |...4ADCS R2,R1,R|
000053b0 32 2c 4c 53 4c 23 31 3a 53 55 42 43 43 20 52 32 |2,LSL#1:SUBCC R2|
000053c0 2c 52 32 2c 52 31 3a 41 44 43 53 20 52 30 2c 52 |,R2,R1:ADCS R0,R|
000053d0 30 2c 52 30 0d 19 c8 10 53 55 42 20 52 33 2c 52 |0,R0....SUB R3,R|
000053e0 33 2c 23 34 0d 19 d2 0d 54 45 51 20 52 33 2c 23 |3,#4....TEQ R3,#|
000053f0 30 0d 19 dc 36 42 4e 45 20 64 69 76 5f 6d 6f 64 |0...6BNE div_mod|
00005400 5f 31 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |_1 |
00005410 20 20 20 5c 20 44 4f 20 ac 20 43 4f 52 52 55 50 | \ DO . CORRUP|
00005420 54 20 43 41 52 52 59 0d 19 e6 0f 4d 4f 56 53 20 |T CARRY....MOVS |
00005430 50 43 2c 52 31 34 0d 19 f0 04 0d 19 fa 0e 2e 6c |PC,R14.........l|
00005440 6f 67 5f 73 74 61 72 74 0d 1a 04 1a 53 54 4d 46 |og_start....STMF|
00005450 44 20 52 31 33 21 2c 7b 52 30 2d 52 32 2c 52 31 |D R13!,{R0-R2,R1|
00005460 34 7d 0d 1a 0e 0f 4d 4f 56 20 52 30 2c 23 26 38 |4}....MOV R0,#&8|
00005470 38 0d 1a 18 14 41 44 52 20 52 31 2c 6c 6f 67 5f |8....ADR R1,log_|
00005480 66 6e 61 6d 65 0d 1a 22 11 53 57 49 20 22 4f 53 |fname..".SWI "OS|
00005490 5f 46 69 6e 64 22 0d 1a 2c 15 53 54 52 20 52 30 |_Find"..,.STR R0|
000054a0 2c 6c 6f 67 5f 68 61 6e 64 6c 65 0d 1a 36 19 4c |,log_handle..6.L|
000054b0 44 4d 46 44 20 52 31 33 21 2c 7b 52 30 2d 52 32 |DMFD R13!,{R0-R2|
000054c0 2c 50 43 7d 0d 1a 40 26 2e 6c 6f 67 5f 66 6e 61 |,PC}..@&.log_fna|
000054d0 6d 65 20 45 51 55 53 20 22 24 2e 54 4d 50 2e 4c |me EQUS "$.TMP.L|
000054e0 6f 67 46 69 6c 65 22 2b bd 30 0d 1a 4a 09 41 4c |ogFile"+.0..J.AL|
000054f0 49 47 4e 0d 1a 54 16 2e 6c 6f 67 5f 68 61 6e 64 |IGN..T..log_hand|
00005500 6c 65 20 45 51 55 44 20 30 0d 1a 5e 14 2e 6c 6f |le EQUD 0..^..lo|
00005510 67 5f 74 65 6d 70 20 45 51 55 44 20 30 0d 1a 68 |g_temp EQUD 0..h|
00005520 04 0d 1a 72 0c 2e 6c 6f 67 5f 65 6e 64 0d 1a 7c |...r..log_end..||
00005530 1a 53 54 4d 46 44 20 52 31 33 21 2c 7b 52 30 2d |.STMFD R13!,{R0-|
00005540 52 32 2c 52 31 34 7d 0d 1a 86 0d 4d 4f 56 20 52 |R2,R14}....MOV R|
00005550 30 2c 23 30 0d 1a 90 15 4c 44 52 20 52 31 2c 6c |0,#0....LDR R1,l|
00005560 6f 67 5f 68 61 6e 64 6c 65 0d 1a 9a 11 53 57 49 |og_handle....SWI|
00005570 20 22 4f 53 5f 46 69 6e 64 22 0d 1a a4 19 4c 44 | "OS_Find"....LD|
00005580 4d 46 44 20 52 31 33 21 2c 7b 52 30 2d 52 32 2c |MFD R13!,{R0-R2,|
00005590 50 43 7d 0d 1a ae 04 0d 1a b8 14 3b 20 52 30 3d |PC}........; R0=|
000055a0 77 6f 72 64 20 74 6f 20 6c 6f 67 0d 1a c2 04 0d |word to log.....|
000055b0 1a cc 0d 2e 6c 6f 67 5f 77 6f 72 64 0d 1a d6 1a |....log_word....|
000055c0 53 54 4d 46 44 20 52 31 33 21 2c 7b 52 30 2d 52 |STMFD R13!,{R0-R|
000055d0 35 2c 52 31 34 7d 0d 1a e0 13 53 54 52 20 52 30 |5,R14}....STR R0|
000055e0 2c 6c 6f 67 5f 74 65 6d 70 0d 1a ea 0d 4d 4f 56 |,log_temp....MOV|
000055f0 20 52 30 2c 23 32 0d 1a f4 15 4c 44 52 20 52 31 | R0,#2....LDR R1|
00005600 2c 6c 6f 67 5f 68 61 6e 64 6c 65 0d 1a fe 13 41 |,log_handle....A|
00005610 44 52 20 52 32 2c 6c 6f 67 5f 74 65 6d 70 0d 1b |DR R2,log_temp..|
00005620 08 0d 4d 4f 56 20 52 33 2c 23 34 0d 1b 12 11 53 |..MOV R3,#4....S|
00005630 57 49 20 22 4f 53 5f 47 42 50 42 22 0d 1b 1c 19 |WI "OS_GBPB"....|
00005640 4c 44 4d 46 44 20 52 31 33 21 2c 7b 52 30 2d 52 |LDMFD R13!,{R0-R|
00005650 35 2c 50 43 7d 0d 1b 26 04 0d 1b 30 05 5d 0d 1b |5,PC}..&...0.]..|
00005660 3a 07 3d 22 22 0d 1b 44 04 0d 1b 4e 14 dd 20 a4 |:.=""..D...N.. .|
00005670 73 6f 75 6e 64 5f 6d 65 6d 28 61 25 29 0d 1b 58 |sound_mem(a%)..X|
00005680 11 50 25 2b 3d 61 25 3a 4f 25 2b 3d 61 25 0d 1b |.P%+=a%:O%+=a%..|
00005690 62 07 3d 22 22 0d ff |b.=""..|
00005697 
.