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bank_B5.asm
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bank_B5.asm
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upload_spc_engine:
JMP .upload_spc_engine_wrapper ;$B58000 |
#queue_sound_effect:
JMP .queue_sound_effect ;$B58003 |
#queue_song:
JMP .queue_song ;$B58006 |
#play_queued_song:
JMP .play_queued_song ;$B58009 |
#play_song:
JMP .play_song ;$B5800C |
#play_song_with_transition:
JMP .play_song_with_transition ;$B5800F |
#CODE_B58012:
JMP .CODE_B581CE ;$B58012 |
#null_spc_command:
JMP .null_spc_command ;$B58015 |
#transition_song:
JMP .transition_song ;$B58018 |
#CODE_B5801B:
JMP .CODE_B581C2 ;$B5801B |
#play_queued_sound_effect:
JMP .play_queued_sound_effect ;$B5801E |
#play_high_priority_sound:
JMP .play_high_priority_sound ;$B58021 |
.unused_play_sound_effect
PHB ;$B58024 \
PHK ;$B58025 |\ Use current databank
PLB ;$B58026 |/
ORA #$0500 ;$B58027 |\ Play sound effect on channel 5
TAX ;$B5802A | |
JSR .write_spc_command ;$B5802B |/
PLB ;$B5802E |
RTL ;$B5802F /
.queue_sound_effect
PHB ;$B58030 \
PHY ;$B58031 | Preserve Y (routine will only clobber A/X)
PHK ;$B58032 |\ Use current databank
PLB ;$B58033 |/
LDX $0634 ;$B58034 |\ If the current slot already has same the sound effect
CMP $0622,x ;$B58037 | |
BEQ ..return ;$B5803A |/ skip adding it to the queue
TAY ;$B5803C | Preserve the sournd effect
INX ;$B5803D |\ Increment write ring index the next buffer slot
INX ;$B5803E | |
TXA ;$B5803F | |
AND #$000E ;$B58040 | |
TAX ;$B58043 |/
LDA $0622,x ;$B58044 |\ If the slot is not empty, return -- buffer is full
BNE ..return ;$B58047 |/
TYA ;$B58049 | Restore the sound effect
STA $0622,x ;$B5804A | Write sound effect to the buffer
STX $0634 ;$B5804D | Write new ring buffer index
..return ; |
PLY ;$B58050 |\ Restore Y and databank
PLB ;$B58051 |/
RTL ;$B58052 /
.play_queued_sound_effect
PHB ;$B58053 \
PHK ;$B58054 |\ Use current databank
PLB ;$B58055 |/
LDA global_frame_counter ;$B58056 |\ If a sound effect was already uploaded this frame
CMP $0636 ;$B58058 | |
BEQ ..return ;$B5805B |/ return -- one effect per frame
LDX $0632 ;$B5805D |\ If the sound effect slot is empty
LDA $0622,x ;$B58060 | |
BEQ ..return ;$B58063 |/ return -- nothing to do
STZ $0622,x ;$B58065 | Clear slot after it is loaded
BMI ..upgrade_sound_priority ;$B58068 | If MSB is set, the sound effect is high priority
JSR .play_low_priority_sound ;$B5806A | If MSB is clear, handle the sound effect as low priority
BRA ..increment_queue ;$B5806D / increment the sound effect read ring buffer index
..upgrade_sound_priority
AND #$7FFF ;$B5806F \ Mask off MSB to get the true sound effect value
JSL .play_high_priority_sound ;$B58072 | Play the sound effect
..increment_queue ; |
LDA $0632 ;$B58076 |\ Increment the read ring buffer index
INC A ;$B58079 | |
INC A ;$B5807A | |
AND #$000E ;$B5807B | |
STA $0632 ;$B5807E |/
LDA global_frame_counter ;$B58081 |\ Write the frame of the last sound effect upload
STA $0636 ;$B58083 |/
..return ; |
PLB ;$B58086 | restore data bank
RTL ;$B58087 /
.play_low_priority_sound
SEP #$30 ;$B58088 \ Enter 8 bit mode (to split sound effect and channel)
XBA ;$B5808A |\ Check if the target channel is already being used
TAX ;$B5808B | |
LDA $0621 ;$B5808C | |
BIT .index_to_bit,x ;$B5808F | |
BNE .test_sound_backup_channel ;$B58092 |/ If so, check if the backup channel is free
.write_low_priority_sound ; |
TXA ;$B58094 |\ Since the channel is free
XBA ;$B58095 | |
STA $0619,x ;$B58096 |/ write effect id to channel buffer
REP #$30 ;$B58099 |\ Return to 16 bit mode
TAX ;$B5809B |/
JMP .write_spc_command ;$B5809C / Transfer the sound effect to the SPC700
.test_sound_backup_channel ; \
LDX #$04 ;$B5809F |\ If the original channel was full, try channel 4 instead
BIT .index_to_bit,x ;$B580A1 | |
BEQ .write_low_priority_sound ;$B580A4 |/
REP #$30 ;$B580A6 | Otherwise restore 16 bit mode and return -- no slots left
RTS ;$B580A8 /
.play_high_priority_sound
SEP #$30 ;$B580A9 \ Enter 8 bit mode (to split sound effect and channel)
XBA ;$B580AB |\ Get the sound effect channel
AND #$0F ;$B580AC | |
TAX ;$B580AE |/
XBA ;$B580AF |\ Write the sound effect id to the channel buffer
STA $0619,x ;$B580B0 |/
BEQ .reset_channel ;$B580B3 | Branch if the slot was empty
LDA .index_to_bit,x ;$B580B5 |\ Mark the channel as used
TSB $0621 ;$B580B8 |/
BRA .write_sound ;$B580BB / skip marking the slot empty
.reset_channel ; \
LDA .index_to_bit,x ;$B580BD |\ Since the slot was empty mark the channel as empty
TRB $0621 ;$B580C0 |/
.write_sound ; |
LDA $0619,x ;$B580C3 |\ Write the sound effect to the SPC700
REP #$30 ;$B580C6 | |
TAX ;$B580C8 | |
JSR .write_spc_command ;$B580C9 |/
RTL ;$B580CC /
.index_to_bit
db $01, $02, $04, $08, $10, $20, $40, $80
.queue_song
PHB ;$B580D5 \
PHK ;$B580D6 |\ Use current databank
PLB ;$B580D7 |/
STA current_song ;$B580D8 | Set the active song
LDX #$00FF ;$B580DA |\ Place SPC engine into upload mode
JSR .write_spc_command ;$B580DD |/
JSR .upload_song_sample_set ;$B580E0 |\ Upload song data, sound effects, and samples
JSR .upload_song_data ;$B580E3 | |
JSR .upload_song_sound_effects ;$B580E6 |/
JSR .execute_spc_sound_engine ;$B580E9 | Resume the SPC engine main loop
PLB ;$B580EC |
RTL ;$B580ED /
.play_queued_song ; \
PHB ;$B580EE |\ Change to current databank
PHK ;$B580EF | |
PLB ;$B580F0 |/
JSR .clear_sound_buffers ;$B580F1 |
LDX #$00FE ;$B580F4 |\ Tell the SPC engine to start playing music
JSR .write_spc_command ;$B580F7 |/
LDA stereo_select ;$B580FA |\ Write mono or stereo setting to SPC engine
XBA ;$B580FC | |
ORA #$00FA ;$B580FD | |
TAX ;$B58100 | |
JSR .write_spc_command ;$B58101 |/
PLB ;$B58104 | Restore databank
RTL ;$B58105 /
.play_song
PHB ;$B58106 \
PHK ;$B58107 |\ Use current databank
PLB ;$B58108 |/
STA current_song ;$B58109 | Set the active song
LDX #$00FF ;$B5810B |\ Place SPC engine into upload mode
JSR .write_spc_command ;$B5810E |/
JSR .upload_song_sample_set ;$B58111 |\ Upload song data, sound effects, and samples
JSR .upload_song_data ;$B58114 | |
JSR .upload_song_sound_effects ;$B58117 |/
JSR .clear_sound_buffers ;$B5811A | Clear the sound effect ring buffers
JSR .execute_spc_sound_engine ;$B5811D | Resume the SPC main loop
LDX #$00FE ;$B58120 |\ Tell the SPC engine to start playing music
JSR .write_spc_command ;$B58123 |/
LDA stereo_select ;$B58126 |\ Write mono or stereo setting to SPC engine
XBA ;$B58128 | |
ORA #$00FA ;$B58129 | |
TAX ;$B5812C | |
JSR .write_spc_command ;$B5812D |/
PLB ;$B58130 | Restore databank
RTL ;$B58131 /
.play_song_with_transition
PHB ;$B58132 \
PHK ;$B58133 |\ Use current databank
PLB ;$B58134 |/
PHA ;$B58135 | Preserve input (used to extract transition state later)
AND #$00FF ;$B58136 |\ Set the active song (mask off transition state)
STA current_song ;$B58139 |/
LDX #$00FF ;$B5813B |\ Place SPC engine into upload mode
JSR .write_spc_command ;$B5813E |/
JSR .upload_song_sample_set ;$B58141 |\ Upload song data, sound effects, and samples
JSR .upload_song_data ;$B58144 | |
JSR .upload_song_sound_effects ;$B58147 |/
JSR .clear_sound_buffers ;$B5814A | Clear the sound effect ring buffers
JSR .execute_spc_sound_engine ;$B5814D | Resume the SPC main loop
PLA ;$B58150 |\ Set initial transition state (from preserved input)
AND #$FF00 ;$B58151 | |
ORA #$00FB ;$B58154 | |
TAX ;$B58157 | |
JSR .write_spc_command ;$B58158 |/
LDX #$00FE ;$B5815B |\ Tell the SPC engine to start playing music
JSR .write_spc_command ;$B5815E |/
LDA stereo_select ;$B58161 |\ Write mono or stereo setting to SPC engine
XBA ;$B58163 | |
ORA #$00FA ;$B58164 | |
TAX ;$B58167 | |
JSR .write_spc_command ;$B58168 |/
PLB ;$B5816B | Restore databank
RTL ;$B5816C /
.clear_sound_buffers
LDX #$0007 ;$B5816D \ Load number of slots to clear
.clear_buffer_entry ; |\ Iterate and clear sound betters
if !version == 0 ; | |
STZ $0622,x ;$B58170 | |\ Clear main ring buffer
STZ $062A,x ;$B58173 | | |
else ; | | |
STZ $0621,x ;$B58170 | | |
STZ $0629,x ;$B58173 | | |
endif ; | |/
STZ $0619,x ;$B58176 | | Clear the high priority buffer
DEX ;$B58179 | |
DEX ;$B5817A | |
BPL .clear_buffer_entry ;$B5817B |/
STZ $0634 ;$B5817D | Clear next buffer position
STZ $0636 ;$B58180 | Clear last upload frame
LDA #$0002 ;$B58183 |\ Reset next read position
STA $0632 ;$B58186 |/
STZ $19B0 ;$B58189 |
RTS ;$B5818C /
.upload_spc_engine_wrapper
JSR .upload_spc_engine ;$B5818D \ Wrapper around SPC engine upload routine
RTL ;$B58190 /
.upload_spc_engine
JSR .upload_spc_base_engine ;$B58191 \ Upload the core of the SPC engine
JSR .upload_spc_sound_engine ;$B58194 | Upload the sound processor of the SPC engine
JSR .upload_global_samples ;$B58197 |
LDA #sound_effect_data ;$B5819A |\ Load pointer to sound effect data
STA $32 ;$B5819D | |
LDA.w #sound_effect_data>>16 ;$B5819F | |
STA $34 ;$B581A2 |/
JSR .upload_inline_spc_block ;$B581A4 | Upload the sound effect data
JSR .execute_spc_sound_engine ;$B581A7 | Jump to the sound engine entry
RTS ;$B581AA /
.dead_code
RTS ;$B581AB > Dead code
.execute_spc_sound_engine ; \
LDA #$0672 ;$B581AC |\ Load the sound engine entry point
STA $35 ;$B581AF |/
STZ $37 ;$B581B1 | Zero size transfer means execute jump
JSR .upload_spc_block ;$B581B3 | Call the upload routine
RTS ;$B581B6 /
.unused_spc_execute
LDA #$06E3 ;$B581B7 \ Dead code, would crash SPC engine.
STA $35 ;$B581BA |
STZ $37 ;$B581BC |
JSR .upload_spc_block ;$B581BE |
RTS ;$B581C1 /
.CODE_B581C2
AND #$00FF ;$B581C2 \
XBA ;$B581C5 |
ORA #$00FC ;$B581C6 |
TAX ;$B581C9 |
JSR .write_spc_command ;$B581CA |
RTL ;$B581CD /
.CODE_B581CE
AND #$00FF ;$B581CE \
XBA ;$B581D1 |
ORA #$00FD ;$B581D2 |
TAX ;$B581D5 |
JSR .write_spc_command ;$B581D6 |
RTL ;$B581D9 /
.null_spc_command
RTL ;$B581DA > Unused SPC command that does nothing
.transition_song
PHB ;$B581DB \
PHK ;$B581DC |\ Use current databank
PLB ;$B581DD |/
AND #$00FF ;$B581DE |\ Select transition
XBA ;$B581E1 | |
ORA #$00FB ;$B581E2 | |
TAX ;$B581E5 | |
JSR .write_spc_command ;$B581E6 |/
LDX #$00FE ;$B581E9 |\ Tell the SPC engine to start playing music
JSR .write_spc_command ;$B581EC |/
LDA stereo_select ;$B581EF |\ Write mono or stereo setting to SPC engine
XBA ;$B581F1 | |
ORA #$00FA ;$B581F2 | |
TAX ;$B581F5 | |
JSR .write_spc_command ;$B581F6 |/
PLB ;$B581F9 | Restore databank
RTL ;$B581FA /
.write_spc_command
TXA ;$B581FB \ Move the command into A
REP #$20 ;$B581FC |\ Use index as 8 bit, with 16 bit accumulator
SEP #$10 ;$B581FE |/
LDX spc_transaction ;$B58200 | Load the previous SPC transaction id
- ; |
CPX APU.IO1 ;$B58202 |\ Wait for the SPC engine to echo the previous transaction id
BNE - ;$B58205 |/
STA APU.IO2 ;$B58207 | Write the command to the SPC engine
INX ;$B5820A |\ Increment and send the SPC transaction id
STX APU.IO1 ;$B5820B |/
STX spc_transaction ;$B5820E | Store the SPC transaction id
REP #$30 ;$B58210 |
RTS ;$B58212 / Command upload finished
.upload_spc_base_engine ; \
REP #$20 ;$B58213 |\ Use index as 8 bit, with 16 bit accumulator
SEP #$10 ;$B58215 |/
LDA #$BBAA ;$B58217 | The IPL uses BBAA to indicate ready state
- ; |\ Wait for the SPC 700 to be ready
CMP APU.IO1 ;$B5821A | |
BNE - ;$B5821D |/
LDA #$04D8 ;$B5821F |\ Set ARAM address for data transfer
STA APU.IO3 ;$B58222 |/
LDA #$01CC ;$B58225 |\ Acknowledge the SPC-700 IPL and initiate a data transfer
STA APU.IO1 ;$B58228 |/
TAX ;$B5822B | SPC echo is only a single byte, so use index registers
- ; |\ Wait for the SPC-700 to acknowledge the SNES CPU
CPX APU.IO1 ;$B5822C | |
BNE - ;$B5822F |/
LDX #$00 ;$B58231 | Initialize the transfer counter
..next_byte ; |\
LDA.l spc_base_engine,x ;$B58233 | |\ Load and store the current engine byte
TAY ;$B58237 | | |
STY APU.IO2 ;$B58238 | |/
STX APU.IO1 ;$B5823B | | Store the transaction counter
- ; | |\ Wait for the SPC to echo the counter
CPX APU.IO1 ;$B5823E | | |
BNE - ;$B58241 | |/
INX ;$B58243 | | Increment the counter
CPX #$88 ;$B58244 | | Compare against the engine size
BNE ..next_byte ;$B58246 |/ If we haven't hit the engine size, load the next byte
INX ;$B58248 |\ Increment counter by two to end transfer
TXA ;$B58249 | | Use A to write the counter for 16 bit (high byte = 00)
STA APU.IO1 ;$B5824A |/ Since 00 is written, the uploaded code will be executed
- ; |\ Wait for the SPC echo
CPX APU.IO1 ;$B5824D | |
BNE - ;$B58250 |/
STZ spc_transaction ;$B58252 | Reset the SPC transaction id
LDA #$0001 ;$B58254 |\ Default to mono audio
STA stereo_select ;$B58257 |/
REP #$30 ;$B58259 |
RTS ;$B5825B / All done, new SPC base engine set up.
.upload_song_data
LDA current_song ;$B5825C \ Load currently set song
CLC ;$B5825E |\ Multiply song number by 6 to get an offset to song data
ROL A ;$B5825F | | Effectively (X << 1) + (X << 2)
STA $32 ;$B58260 | |
ROL A ;$B58262 | |
CLC ;$B58263 | |
ADC $32 ;$B58264 |/
TAX ;$B58266 | Move offset to an index register
LDA.l song_data,x ;$B58267 |\ Load pointer to song data
STA $32 ;$B5826B | |
LDA.l song_data+2,x ;$B5826D | |
STA $34 ;$B58271 |/
JSR .upload_inline_spc_block ;$B58273 | Upload song data
RTS ;$B58276 /
.upload_song_sound_effects ; \
LDA current_song ;$B58277 |\ Triple song id
CLC ;$B58279 | |
ADC current_song ;$B5827A | |
ADC current_song ;$B5827C |/
TAX ;$B5827E | Move offset to an index register
LDA.l DATA_EE117B,x ;$B5827F |\ Load pointer to song specific sound effects
STA $32 ;$B58283 | |
LDA.l DATA_EE117D,x ;$B58285 | |
STA $34 ;$B58289 |/
JSR .upload_inline_spc_block ;$B5828B | Upload sound effect data
RTS ;$B5828E /
.upload_spc_sound_engine
REP #$30 ;$B5828F \
LDA #spc_sound_engine ;$B58291 |\ Load a pointer to SPC sound engine
STA $32 ;$B58294 | |
LDA.w #spc_sound_engine>>16 ;$B58296 | |
STA $34 ;$B58299 |/
LDA #$0560 ;$B5829B |\ Set the ARAM destination
STA $35 ;$B5829E |/
LDA #$067F ;$B582A0 |\ Set the number of words to transfer
STA $37 ;$B582A3 |/
JSR .upload_spc_block ;$B582A5 | Upload SPC block
RTS ;$B582A8 /
.upload_global_samples ; \
LDA #global_sample_map ;$B582A9 |\ Load the pointer to the global sample map
STA $0E ;$B582AC | |
LDA.w #global_sample_map>>16 ;$B582AE | |
STA $10 ;$B582B1 |/
LDA #$3100 ;$B582B3 |\ Source directory ARAM destination
STA $02 ;$B582B6 |/
STZ $0A ;$B582B8 |
LDA #$3400 ;$B582BA |\ Sample data ARAM destination
STA $06 ;$B582BD |/
STZ $0A ;$B582BF | Reset the sample counter
JSR .sample_uploader ;$B582C1 |
LDA $02 ;$B582C4 |\ Set next pending source directory ARAM destination
STA $04 ;$B582C6 |/
LDA $06 ;$B582C8 |\ Set next pending sample data ARAM destination
STA $08 ;$B582CA |/
LDA $0A ;$B582CC |\ Set next pending sample number
STA $0C ;$B582CE |/
RTS ;$B582D0 /
.sample_uploader
STZ $0A ;$B582D1 \ Reset the sample counter
LDX #$0000 ;$B582D3 |
LDA $0A ;$B582D6 |\ Copy sample number (always zero in this case)
STA $3A ;$B582D8 |/
LDA $0E ;$B582DA |\ Copy sample map pointer
STA $3E ;$B582DC | |
LDA $10 ;$B582DE | |
STA $40 ;$B582E0 |/
LDA $02 ;$B582E2 |\ Copy source directory ARAM destination
STA $42 ;$B582E4 |/
LDA $06 ;$B582E6 |\ Copy sample data ARAM destination
STA $44 ;$B582E8 |/
.parse_next_sample ; |
LDA [$3E] ;$B582EA | Load sample number
INC $3E ;$B582EC |\ Increment the sample map pointer
INC $3E ;$B582EE |/
CMP #$FFFF ;$B582F0 |\ Sample number FFFF implies end of table, branch and upload
BEQ .upload_sample_directory ;$B582F3 |/
STA $3C ;$B582F5 |\ Triple sample number to index sample pointer table
CLC ;$B582F7 | |
ADC $3C ;$B582F8 | |
ADC $3C ;$B582FA |/
TXY ;$B582FC | Preserve ARAM buffer index
TAX ;$B582FD |\ Load pointer to the current sample
LDA.l sample_table,x ;$B582FE | |
STA $32 ;$B58302 | |
LDA.l sample_table+2,x ;$B58304 | |
STA $34 ;$B58308 |/
TYX ;$B5830A | Restore ARAM buffer index
LDA $06 ;$B5830B |\ Store sample data ARAM destination
STA $7E2200,x ;$B5830D |/
INX ;$B58311 |\ Increment ARAM buffer index
INX ;$B58312 |/
LDA [$32] ;$B58313 |\ Load size of unlooped sample data
CLC ;$B58315 | |
ADC $06 ;$B58316 | | Add unlooped sample data and ARAM destination
STA $7E2200,x ;$B58318 |/ Store destination of sample loop entry
INX ;$B5831C |\ Increment ARAM buffer index
INX ;$B5831D |/
INC $02 ;$B5831E |\ Increase source directory ARAM destination by 4 bytes
INC $02 ;$B58320 | |
INC $02 ;$B58322 | |
INC $02 ;$B58324 |/
INC $32 ;$B58326 |\ Increment pointer to current sample data
INC $32 ;$B58328 |/
LDA [$32] ;$B5832A |\ Load size of looped sample data
CLC ;$B5832C | |
ADC $06 ;$B5832D | | Add looped sample data and ARAM destination
STA $06 ;$B5832F |/ Store next potential ARAM sample destination
BRA .parse_next_sample ;$B58331 / Parse the next sample
.upload_sample_directory ; \
LDA #$2200 ;$B58333 |\ Set upload source to $7E2200
STA $32 ;$B58336 | |
LDA #$007E ;$B58338 | |
STA $34 ;$B5833B |/
LDA $42 ;$B5833D |\ Set ARAM destination
STA $35 ;$B5833F |/
LDA #$3400 ;$B58341 |\ Calculate and set upload size
SEC ;$B58344 | |
SBC $42 ;$B58345 | | word count = ($3400 - ARAM dest + 1) / 2
CLC ;$B58347 | |
INC A ;$B58348 | |
LSR A ;$B58349 | |
STA $37 ;$B5834A |/
JSR .upload_spc_block ;$B5834C | Upload sample directory
LDA #global_sample_map ;$B5834F |\ Load global sample map pointer
STA $3E ;$B58352 | |
LDA.w #global_sample_map>>16 ;$B58354 | |
STA $40 ;$B58357 |/
LDA $0E ;$B58359 |\ If the sample map pointer is not the global samples
CMP $3E ;$B5835B | |
BNE .map_global_sample ;$B5835D |/ Branch and include global samples in the mapping
LDA $10 ;$B5835F |\ If the pointer does match the global samples
CMP $40 ;$B58361 | |
BEQ .upload_samples ;$B58363 |/ Branch ahead and don't double map global samples
.map_global_sample ; |
LDA [$3E] ;$B58365 | Load the sample number
CMP #$FFFF ;$B58367 |\ Sample number FFFF implies end of table, in that case
BEQ .map_set_specific_samples ;$B5836A |/ Branch and map set specific samples
INC $3E ;$B5836C |\ Increment sample map pointer
INC $3E ;$B5836E |/
TAX ;$B58370 | Use sample number as an index
LDA $0A ;$B58371 |\ Store the sample id at the sample number index
SEP #$20 ;$B58373 | |
STA $7E2200,x ;$B58375 | |
REP #$20 ;$B58379 |/
INC $0A ;$B5837B | Increment the sample number count
BRA .map_global_sample ;$B5837D / Parse next sample map entry
.map_set_specific_samples ; \
LDA $0E ;$B5837F |\ Load target sample map pointer
STA $3E ;$B58381 | |
LDA $10 ;$B58383 | |
STA $40 ;$B58385 |/
.map_sample ; |
LDA [$3E] ;$B58387 | Load the sample number
CMP #$FFFF ;$B58389 |\ Sample number FFFF implies end of table, branch and upload
BEQ .upload_source_number_map ;$B5838C |/
INC $3E ;$B5838E |\ Increment sample map pointer
INC $3E ;$B58390 |/
TAX ;$B58392 | Use sample number as an index
LDA $0A ;$B58393 |\ Store the sample id at the sample number index
SEP #$20 ;$B58395 | |
STA $7E2200,x ;$B58397 | |
REP #$20 ;$B5839B |/
INC $0A ;$B5839D | Increment the sample number count
BRA .map_sample ;$B5839F / Parse next sample map entry
.upload_source_number_map ; \
LDA #$2200 ;$B583A1 |\ Set upload source to $7E2200
STA $32 ;$B583A4 | |
LDA #$007E ;$B583A6 | |
STA $34 ;$B583A9 |/
LDA #$0560 ;$B583AB |\ Set ARAM Destination to $0560
STA $35 ;$B583AE |/
LDA #$0080 ;$B583B0 |\ Set transfer size to 128 words
STA $37 ;$B583B3 |/
JSR .upload_spc_block ;$B583B5 | Upload the source number table
.upload_samples ; |
LDA $44 ;$B583B8 |\ Load and copy the sample destination pointer
STA $06 ;$B583BA |/
.upload_next_sample ; |
LDA [$0E] ;$B583BC | Load the sample number
CMP #$FFFF ;$B583BE |\ Sample number FFFF implies end of table, branch and return
BEQ ..return ;$B583C1 |/
INC $0E ;$B583C3 |\ Increment sample map pointer
INC $0E ;$B583C5 |/
STA $3C ;$B583C7 |\ Triple sample number to index sample data pointer table
CLC ;$B583C9 | |
ADC $3C ;$B583CA | |
ADC $3C ;$B583CC | |
TAX ;$B583CE |/
LDA.l sample_table,x ;$B583CF |\ Load a the pointer to the sample.
STA $32 ;$B583D3 | |
LDA.l sample_table+2,x ;$B583D5 | |
STA $34 ;$B583D9 |/
INC $32 ;$B583DB |\ Skip unlooped intro size
INC $32 ;$B583DD |/
LDA $06 ;$B583DF |\ Load and copy the ARAM destination
STA $35 ;$B583E1 |/
LDA [$32] ;$B583E3 |\ Load and copy the size of the sample to upload
STA $37 ;$B583E5 |/
CLC ;$B583E7 |\ Add the ARAM destination and sample size
ADC $35 ;$B583E8 | |
STA $06 ;$B583EA |/ Store this as the next ARAM destination
CLC ;$B583EC |\ Convert bytes to upload to words to upload
INC $37 ;$B583ED | |
LSR $37 ;$B583EF |/
INC $32 ;$B583F1 |\ Increment pointer so the sample data start is the next byte
INC $32 ;$B583F3 |/
JSR .upload_spc_block ;$B583F5 | Upload the sample data
BRA .upload_next_sample ;$B583F8 / Continue uploading samples
..return
RTS ;$B583FA > All done, no more samples.
.upload_inline_spc_block ; \
LDA [$32] ;$B583FB |\ Load the destination ARAM address from the block
STA $35 ;$B583FD |/
INC $32 ;$B583FF |\ Increment the pointer
INC $32 ;$B58401 |/
LDA [$32] ;$B58403 |\ Load the transfer length from the block
STA $37 ;$B58405 |/
INC $32 ;$B58407 |\ Increment the pointer
INC $32 ;$B58409 |/
BRA .upload_spc_block ;$B5840B / Continue to the normal SPC block upload
.upload_spc_block
SEP #$10 ;$B5840D \ 16 bit A, with 8 bit index
LDX spc_transaction ;$B5840F | Load the last SPC transaction id
- ; |\ Wait for the previous transaction id to be echoed
CPX APU.IO1 ;$B58411 | | Which will signify the SPC engine is ready.
BNE - ;$B58414 |/
LDA $35 ;$B58416 |\ Write the ARAM target address
STA APU.IO2 ;$B58418 |/
INX ;$B5841B |\ Increment and set the transaction id
STX APU.IO1 ;$B5841C |/
LDA $37 ;$B5841F |\ Copy the byte count
STA $39 ;$B58421 |/
- ; |\ Wait for the transaction id to echo for completion
CPX APU.IO1 ;$B58423 | |
BNE - ;$B58426 |/
STA APU.IO2 ;$B58428 | Write the length of the transfer
INX ;$B5842B |\ Increment and set the transaction id
STX APU.IO1 ;$B5842C |/
LDA $37 ;$B5842F |\ If there are no bytes to transfer simply exit
BEQ .return ;$B58431 |/ This means we were only executing a jump
LDY #$00 ;$B58433 |
.next_byte ; |
LDA [$32],y ;$B58435 | Load next byte
INY ;$B58437 |\ Advance the data index
INY ;$B58438 |/
BEQ .advance_pointer ;$B58439 | If the index has wrapped, advance the pointer
.wait_for_echo ; |\ Wait for the transaction id to echo for completion
CPX APU.IO1 ;$B5843B | |
BNE .wait_for_echo ;$B5843E |/
INX ;$B58440 | Increment the transaction id
STA APU.IO2 ;$B58441 | Write the data (two bytes)
STX APU.IO1 ;$B58444 | Write the transaction id
DEC $37 ;$B58447 |\ Continue if there are more bytes to upload
BNE .next_byte ;$B58449 |/
.return ; |
STX spc_transaction ;$B5844B | Store the final SPC transaction id
REP #$30 ;$B5844D | Return to full 16 bit
LDA $39 ;$B5844F |\ Store double the transfer count in A
ASL A ;$B58451 |/
RTS ;$B58452 / Finished with SPC block upload
.advance_pointer ; \
LDY $33 ;$B58453 |\ Increment the pointer high byte
INY ;$B58455 |/
BNE .skip_pointer_bank_cross ;$B58456 | If it doesn't roll over, skip incrementing the bank
STY $33 ;$B58458 | Set the new pointer mid byte
LDY $34 ;$B5845A |\ Increment the pointer bank
INY ;$B5845C | |
STY $34 ;$B5845D |/
LDY #$00 ;$B5845F | Reset the data index
BRA .wait_for_echo ;$B58461 /
.skip_pointer_bank_cross
STY $33 ;$B58463 \ Store the new pointer offset
LDY #$00 ;$B58465 | Reset the data index
BRA .wait_for_echo ;$B58467 /
.upload_song_sample_set
LDA current_song ;$B58469 \ Load currently set song
CLC ;$B5846B |\ Multiply song number by 6 to song sample set offset
ROL A ;$B5846C | | Effectively (X << 1) + (X << 2)
STA $32 ;$B5846D | |
ROL A ;$B5846F | |
CLC ;$B58470 | |
ADC $32 ;$B58471 |/
TAX ;$B58473 | Move offset to an index register
LDA.l song_sample_sets,x ;$B58474 |\ Load pointer to song sample set
STA $0E ;$B58478 | |
LDA.l song_sample_sets+2,x ;$B5847A | |
STA $10 ;$B5847E |/
LDA $04 ;$B58480 |\ Set next pending source directory ARAM destination
STA $02 ;$B58482 |/
LDA $08 ;$B58484 |\ Set next pending sample data ARAM destination
STA $06 ;$B58486 |/
LDA $0C ;$B58488 |\ Set next pending sample number
STA $0A ;$B5848A |/
JSR .sample_uploader ;$B5848C | Upload the samples
RTS ;$B5848F /
DATA_B58490:
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
db $00, $00, $00, $00, $00, $00, $00, $00
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