/
dboot.asm
1726 lines (1563 loc) · 28.7 KB
/
dboot.asm
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FILL $C48000
.A16
.I16
dboot_command:
BRA loc_C48012
; ---------------------------------------------------------------------------
.ASCIIZ " DBOOT VER1.03 "
; ---------------------------------------------------------------------------
loc_C48012:
PHP
PHB
PHD
REP #$30
PHA
PHX
PHY
PHX
LDX #.LOWORD(dboot_ram_start)
PHX
PLD
; D=100
PHK
PLB
; ds=C4000 B=C4
AND #$FF
ASL
TAX
JMP (.LOWORD(dboot_commands_array),X)
; ---------------------------------------------------------------------------
loc_C4802A:
PLY
PLX
PLA
PLD
PLB
PLP
RTL
; End of function dboot_command
; ---------------------------------------------------------------------------
dboot_commands_array:
.ADDR dboot_init_internal, sub_C48076; 0
.ADDR sub_C48085, sub_C48099; 2
.ADDR sub_C480A6, sub_C480B3; 4
.ADDR dboot_init_internal, dboot_init_internal; 6
.ADDR dboot_init_internal, dboot_init_internal; 8
.ADDR dboot_init_internal, dboot_init_internal; $A
.ADDR dboot_init_internal, dboot_init_internal; $C
.ADDR dboot_init_internal, dboot_init_internal; $E
.ADDR sub_C480CC, sub_C480CC; $10
.ADDR sub_C480CC, play_music_internal; $12
.ADDR play_sound_internal, fade_out_music_internal; $14
.ADDR sub_C48114, sub_C48123; $16
.ADDR sub_C48132, sub_C48141; $18
.ADDR sub_C48150 ; $1A
.A16
.I16
dboot_init_internal:
PLX
PHP
REP #$30
JSR a:.LOWORD(clear_dboot_data)
JSR a:.LOWORD(init_array_of_music_related_pointers)
PLP
JML f:loc_C4802A
; End of function dboot_init_internal
.A16
.I16
sub_C48076:
PLX
PHP
REP #$30
JSR a:.LOWORD(init_array_of_music_related_pointers)
JSR a:.LOWORD(sub_C4840E)
PLP
JML f:loc_C4802A
; End of function sub_C48076
.A16
.I16
sub_C48085:
PLX
PHP
REP #$30
TYA
PHA
JSR a:.LOWORD(init_array_of_music_related_pointers)
PLA
STA z:$1A
JSR a:.LOWORD(load_music_bank)
PLP
JML f:loc_C4802A
; End of function sub_C48085
.A16
.I16
sub_C48099:
PLX
PHP
REP #$30
TYA
JSR a:.LOWORD(send_7_bit_data_on_apu_io_0)
PLP
JML f:loc_C4802A
; End of function sub_C48099
.A16
.I16
sub_C480A6:
PLX
PHP
REP #$30
TYA
JSR a:.LOWORD(send_7_bit_data_on_apu_io_1)
PLP
JML f:loc_C4802A
; End of function sub_C480A6
.A16
.I16
sub_C480B3:
PLX
PHP
REP #$30
PHX
PHY
JSR a:.LOWORD(init_array_of_music_related_pointers)
STZ z:$1A
PLY
PLX
STY z:2
STX z:4
JSR a:.LOWORD(load_music_bank)
PLP
JML f:loc_C4802A
; End of function sub_C480B3
.A16
.I16
sub_C480CC:
PLX
PHP
REP #$30
JSR a:.LOWORD(clear_dboot_data)
JSR a:.LOWORD(init_array_of_music_related_pointers)
JSR a:.LOWORD(sub_C4840E)
PLP
JML f:loc_C4802A
; End of function sub_C480CC
.A16
.I16
play_music_internal:
PLX
PHP
REP #$30
PHY
TYA
JSR a:.LOWORD(play_music_return_should_reload_bank)
BCC loc_C480EF
JSR a:.LOWORD(init_array_of_music_related_pointers)
JSR a:.LOWORD(load_music_bank)
loc_C480EF:
PLA
JSR a:.LOWORD(send_7_bit_data_on_apu_io_0)
PLP
JML f:loc_C4802A
; End of function play_music_internal
.A16
.I16
play_sound_internal:
PLX
PHP
REP #$30
TYA
JSR a:.LOWORD(send_7_bit_data_on_apu_io_1)
PLP
JML f:loc_C4802A
; End of function play_sound_internal
.A16
.I16
fade_out_music_internal:
PLX
PHP
REP #$30
LDA #$3B
JSR a:.LOWORD(send_7_bit_data_on_apu_io_0)
PLP
JML f:loc_C4802A
; End of function fade_out_music_internal
.A16
.I16
sub_C48114:
PLX
PHP
REP #$30
LDA #$3A
JSR a:.LOWORD(send_7_bit_data_on_apu_io_0)
PLP
JML f:loc_C4802A
; End of function sub_C48114
.A16
.I16
sub_C48123:
PLX
PHP
REP #$30
LDA #$39
JSR a:.LOWORD(send_7_bit_data_on_apu_io_0)
PLP
JML f:loc_C4802A
; End of function sub_C48123
.A16
.I16
sub_C48132:
PLX
PHP
REP #$30
LDA #$38
JSR a:.LOWORD(send_7_bit_data_on_apu_io_0)
PLP
JML f:loc_C4802A
; End of function sub_C48132
.A16
.I16
sub_C48141:
PLX
PHP
REP #$30
TYA
AND #$FF
STA z:$74
PLP
JML f:loc_C4802A
; End of function sub_C48141
.A16
.I16
sub_C48150:
PLX
PHP
REP #$30
LDA #$3F
JSR a:.LOWORD(send_7_bit_data_on_apu_io_0)
PLP
JML f:loc_C4802A
; End of function sub_C48150
.A16
.I16
play_music_return_should_reload_bank:
PHP
REP #$30
AND #$3F
STA z:dboot_internal_parameter - dboot_ram_start
LDA z:current_music_bank - dboot_ram_start
INC
BEQ loc_C48177
JSR a:.LOWORD(init_array_of_music_related_pointers)
JSR a:.LOWORD(parse_music_bank)
JSR a:.LOWORD(is_music_in_current_bank)
BCC loc_C48193
loc_C48177:
STZ z:current_music_bank - dboot_ram_start
loc_C48179:
JSR a:.LOWORD(init_array_of_music_related_pointers)
JSR a:.LOWORD(parse_music_bank)
JSR a:.LOWORD(is_music_in_current_bank)
BCC loc_C48190
INC z:current_music_bank - dboot_ram_start
LDA z:0
CMP z:current_music_bank - dboot_ram_start
BNE loc_C48179
JML f:loc_C48193
; ---------------------------------------------------------------------------
loc_C48190:
PLP
SEC
RTS
; ---------------------------------------------------------------------------
loc_C48193:
PLP
CLC
RTS
; End of function play_music_return_should_reload_bank
.A16
.I16
is_music_in_current_bank:
PHP
SEP #$20
.A8
SEP #$10
.I8
LDY #0
LDX z:number_of_musics_in_bank - dboot_ram_start
BEQ loc_C481AB
loc_C481A1:
LDA [pointer_to_current_music_list - number_of_music_banks],Y
CMP z:dboot_internal_parameter - dboot_ram_start
BEQ loc_C481AE
INY
DEX
BNE loc_C481A1
loc_C481AB:
PLP
.A16
.I16
SEC
RTS
; ---------------------------------------------------------------------------
loc_C481AE:
PLP
CLC
RTS
; End of function is_music_in_current_bank
.A16
.I16
sub_C481B1:
PHP
REP #$30
PHA
LDA z:unk_7E011C - dboot_ram_start
JSR a:.LOWORD(send_command_on_apu_io_2_3)
PLA
JSR a:.LOWORD(send_command_on_apu_io_2_3_part_2)
INC z:unk_7E011C - dboot_ram_start
INC z:unk_7E011C - dboot_ram_start
PLP
RTS
; End of function sub_C481B1
.A16
.I16
dboot_send_4_byte_command:
PHP
REP #$30
LDA z:unk_7E0164 - dboot_ram_start
JSR a:.LOWORD(send_command_on_apu_io_2_3)
LDA z:unk_7E0168 - dboot_ram_start
JSR a:.LOWORD(send_command_on_apu_io_2_3_part_2)
PLP
RTS
; End of function dboot_send_4_byte_command
.A16
.I16
sub_C481D3:
PHP
REP #$30
LDA z:$1C
JSR a:.LOWORD(send_command_on_apu_io_2_3)
LDY z:$64
STZ z:$64
LDA z:$68
INC
AND #$FFFE
LSR
TAX
loc_C481E7:
LDA [$64],Y
STA f:APU_I_O_PORT_2
SEP #$20
.A8
LDA f:APU_I_O_PORT_0
EOR #$80
AND #$80
STA f:APU_I_O_PORT_0
loc_C481FB:
CMP f:APU_I_O_PORT_0
BNE loc_C481FB
REP #$20
.A16
INY
INY
BPL loc_C48217
loc_C48207:
DEX
BNE loc_C481E7
LDA z:$1C
CLC
ADC z:$68
INC
AND #$FFFE
STA z:$1C
PLP
RTS
; ---------------------------------------------------------------------------
loc_C48217:
INC z:$66
LDY #$8000
JML f:loc_C48207
; End of function sub_C481D3
.A16
.I16
sub_C48220:
PHP
REP #$30
LDA z:$1C
JSR a:.LOWORD(send_command_on_apu_io_2_3)
LDY z:$64
STZ z:$64
LDA z:$68
INC
AND #$FFFE
LSR
TAX
loc_C48234:
LDA [$64],Y
STA f:APU_I_O_PORT_2
SEP #$20
.A8
LDA f:APU_I_O_PORT_0
EOR #$80
AND #$80
STA f:APU_I_O_PORT_0
loc_C48248:
CMP f:APU_I_O_PORT_0
BNE loc_C48248
REP #$20
.A16
INY
INY
DEX
BNE loc_C48234
LDA z:$1C
CLC
ADC z:$68
INC
AND #$FFFE
STA z:$1C
PLP
RTS
; End of function sub_C48220
.A16
.I16
send_command_on_apu_io_2_3:
PHP
REP #$20
STA f:APU_I_O_PORT_2
SEP #$20
.A8
LDA f:APU_I_O_PORT_0
EOR #$80
ORA #$40
STA f:APU_I_O_PORT_0
loc_C48277:
CMP f:APU_I_O_PORT_0
BNE loc_C48277
PLP
.A16
RTS
; End of function send_command_on_apu_io_2_3
.A16
.I16
send_command_on_apu_io_2_3_part_2:
PHP
REP #$20
STA f:APU_I_O_PORT_2
SEP #$20
.A8
LDA f:APU_I_O_PORT_0
EOR #$80
AND #$80
STA f:APU_I_O_PORT_0
loc_C48294:
CMP f:APU_I_O_PORT_0
BNE loc_C48294
PLP
.A16
RTS
; End of function send_command_on_apu_io_2_3_part_2
.A16
.I16
load_music_bank:
PHP
REP #$20
LDA #$2200
STA z:unk_7E011C - dboot_ram_start
JSR a:.LOWORD(parse_music_bank)
JSR a:.LOWORD(clear_sound_related_buffer)
JSR a:.LOWORD(send_apu_command_3e)
JSR a:.LOWORD(load_instruments)
JSR a:.LOWORD(sub_C4863B)
JSR a:.LOWORD(sub_C48728)
JSR a:.LOWORD(sub_C4882B)
JSR a:.LOWORD(sub_C4892E)
JSR a:.LOWORD(sub_C489B7)
JSR a:.LOWORD(sub_C484D1)
PLP
RTS
; End of function load_music_bank
.A16
.I16
init_array_of_music_related_pointers:
PHP
REP #$20
SEP #$10
.I8
LDX #0
loc_C482CB:
LDA f:dboot_data_offsets,X
XBA
STA z:unk_7E0166 - dboot_ram_start
LDA f:dboot_data_offsets + 2,X
XBA
STA z:unk_7E0164 - dboot_ram_start
CMP #$8000
ROL z:unk_7E0166 - dboot_ram_start
CLC
LDA z:unk_7E0164 - dboot_ram_start
AND #$7FFF
ADC #.LOWORD(dboot_data_offsets)
ORA #$8000
STA z:array_of_music_related_pointers - number_of_music_banks,X
LDA z:unk_7E0166 - dboot_ram_start
ADC #.BANKBYTE(dboot_data_offsets)
STA z:array_of_music_related_pointers + 2 - number_of_music_banks,X
INX
INX
INX
INX
CPX #$18
BNE loc_C482CB
LDY #0
LDA [array_of_music_related_pointers - number_of_music_banks],Y ;
XBA
STA z:number_of_music_banks - number_of_music_banks
LDA z:array_of_music_related_pointers - dboot_ram_start
CLC
ADC #2
STA z:array_of_music_related_pointers - dboot_ram_start
LDA z:array_of_music_related_pointers + 2 - number_of_music_banks ;
ADC #0
STA z:array_of_music_related_pointers + 2 - number_of_music_banks ;
PLP
.I16
RTS
; End of function init_array_of_music_related_pointers
.A16
.I16
parse_music_bank:
PHP
REP #$30
LDA #0
TAY
STA z:dboot_temp - dboot_ram_start
LDA z:current_music_bank - dboot_ram_start
CMP z:number_of_music_banks - number_of_music_banks
BCC loc_C48324
STZ z:current_music_bank - dboot_ram_start
loc_C48324:
LDA z:dboot_temp - dboot_ram_start
CMP z:current_music_bank - dboot_ram_start
BNE loc_C48331
INY
INY
JSR a:.LOWORD(save_pointers_for_current_sound_bank) ; Pointer to the bank triplet
BRA loc_C48352
; ---------------------------------------------------------------------------
loc_C48331:
SEC
LDA z:array_of_music_related_pointers - dboot_ram_start
ADC [array_of_music_related_pointers - number_of_music_banks],Y ;
STA z:array_of_music_related_pointers - dboot_ram_start
LDA z:array_of_music_related_pointers+2 - dboot_ram_start
ADC #0
STA z:array_of_music_related_pointers+2 - dboot_ram_start
SEC
TYA
ADC z:array_of_music_related_pointers - dboot_ram_start
STA z:array_of_music_related_pointers - dboot_ram_start
LDA #0
ADC z:array_of_music_related_pointers+2 - dboot_ram_start
STA z:array_of_music_related_pointers+2 - dboot_ram_start
INC z:dboot_temp - dboot_ram_start
JML f:loc_C48324
; ---------------------------------------------------------------------------
loc_C48352:
PLP
RTS
; End of function parse_music_bank
.A16
.I16
save_pointers_for_current_sound_bank:
PHP
REP #$20
LDA #0
SEP #$20
.A8
LDA [array_of_music_related_pointers - number_of_music_banks],Y ;
REP #$20
.A16
STA z:number_of_instruments - number_of_music_banks
TYA
SEC
ADC z:array_of_music_related_pointers - dboot_ram_start
STA z:pointer_to_instrument_list - dboot_ram_start
LDA #0
ADC z:array_of_music_related_pointers+2 - dboot_ram_start
STA z:pointer_to_instrument_list+2 - dboot_ram_start
LDA z:pointer_to_instrument_list - dboot_ram_start
CLC
ADC z:number_of_instruments - number_of_music_banks
STA z:array_of_music_related_pointers - dboot_ram_start
LDA z:pointer_to_instrument_list+2 - dboot_ram_start
ADC #0
STA z:array_of_music_related_pointers+2 - dboot_ram_start
LDY #0
TYA
SEP #$20
.A8
LDA [array_of_music_related_pointers - number_of_music_banks],Y ;
REP #$20
.A16
STA z:number_of_sounds - dboot_ram_start
TYA
SEC
ADC z:array_of_music_related_pointers - dboot_ram_start
STA z:pointer_to_sounds_list - dboot_ram_start
LDA #0
ADC z:array_of_music_related_pointers+2 - dboot_ram_start
STA z:pointer_to_sounds_list+2 - dboot_ram_start
LDA z:pointer_to_sounds_list - dboot_ram_start
CLC
ADC z:number_of_sounds - dboot_ram_start
STA z:array_of_music_related_pointers - dboot_ram_start
LDA z:pointer_to_sounds_list+2 - dboot_ram_start
ADC #0
STA z:array_of_music_related_pointers+2 - dboot_ram_start
LDY #0
TYA
SEP #$20
.A8
LDA [array_of_music_related_pointers - number_of_music_banks],Y ;
REP #$20
.A16
STA z:number_of_musics_in_bank - dboot_ram_start
TYA
SEC
ADC z:array_of_music_related_pointers - dboot_ram_start
STA z:pointer_to_current_music_list - number_of_music_banks
LDA #0
ADC z:array_of_music_related_pointers+2 - dboot_ram_start
STA z:pointer_to_current_music_list+2 - dboot_ram_start
LDA z:pointer_to_current_music_list - number_of_music_banks
CLC
ADC z:number_of_musics_in_bank - dboot_ram_start
STA z:array_of_music_related_pointers - dboot_ram_start
LDA z:pointer_to_current_music_list+2 - dboot_ram_start
ADC #0
STA z:array_of_music_related_pointers+2 - dboot_ram_start
PLP
RTS
; End of function save_pointers_for_current_sound_bank
.A16
.I16
clear_sound_related_buffer:
PHP
SEP #$30
.A8
.I8
LDX #$7F
LDA #$FF
loc_C483D4:
STA f:sound_related_buffer,X
STA f:unk_7FFC80,X
STA f:loaded_instruments,X
STA f:unk_7FFD80,X
STA f:unk_7FFE00,X
DEX
BPL loc_C483D4
PLP
.A16
.I16
RTS
; End of function clear_sound_related_buffer
.A16
.I16
clear_dboot_data:
PHP
SEP #$30
.A8
.I8
LDX #$7F
loc_C483F2:
STZ z:number_of_music_banks - number_of_music_banks,X
DEX
BPL loc_C483F2
REP #$10
.I16
LDX #$27F
LDA #0
loc_C483FE:
STA f:$7FFC00,X
DEX
BPL loc_C483FE
REP #$20
.A16
LDA #$FFFF
STA z:current_music_bank - dboot_ram_start
PLP
RTS
; End of function clear_dboot_data
.A16
.I16
sub_C4840E:
PHP
REP #$20
LDA z:array_of_music_related_pointers+$C - dboot_ram_start
STA z:dboot_temp_pointer - dboot_ram_start
LDA z:array_of_music_related_pointers+$E - dboot_ram_start
STA z:dboot_temp_pointer+2 - dboot_ram_start
JSR a:.LOWORD(dboot_load_spc_program)
JSR a:.LOWORD(sub_C484D1)
PLP
RTS
; End of function sub_C4840E
.A16
.I16
dboot_load_spc_program:
PHP
REP #$30
LDY z:dboot_temp_pointer - dboot_ram_start
STZ z:dboot_temp_pointer - dboot_ram_start
LDA #$BBAA
loc_C4842B:
CMP f:APU_I_O_PORT_0
BNE loc_C4842B
SEP #$20
.A8
LDA #$CC
BRA loc_C48476
; ---------------------------------------------------------------------------
loc_C48437:
LDY #$8000
INC z:dboot_temp_pointer+2 - dboot_ram_start
JML f:loc_C4844E
; ---------------------------------------------------------------------------
loc_C48440:
LDY #$8000
INC z:dboot_temp_pointer+2 - dboot_ram_start
JML f:loc_C48459
; ---------------------------------------------------------------------------
loc_C48449:
LDA [dboot_temp_pointer - number_of_music_banks],Y
INY
BEQ loc_C48437
loc_C4844E:
XBA
LDA #0
BRA loc_C48461
; ---------------------------------------------------------------------------
loc_C48453:
XBA
LDA [dboot_temp_pointer - number_of_music_banks],Y
INY
BEQ loc_C48440
loc_C48459:
XBA
loc_C4845A:
CMP f:APU_I_O_PORT_0
BNE loc_C4845A
INC
loc_C48461:
REP #$20
.A16
STA f:APU_I_O_PORT_0
SEP #$20
.A8
DEX
BNE loc_C48453
loc_C4846C:
CMP f:APU_I_O_PORT_0
BNE loc_C4846C
loc_C48472:
ADC #3
BEQ loc_C48472
loc_C48476:
PHA
REP #$20
.A16
LDA [dboot_temp_pointer - number_of_music_banks],Y
INY
INY
BPL loc_C484A7
loc_C4847F:
TAX
LDA [dboot_temp_pointer - number_of_music_banks],Y
INY
INY
BPL loc_C484AE
loc_C48486:
STA f:APU_I_O_PORT_2
SEP #$20
.A8
CPX #1
LDA #0
ROL
STA f:APU_I_O_PORT_1
ADC #$7F
PLA
STA f:APU_I_O_PORT_0
loc_C4849D:
CMP f:APU_I_O_PORT_0
BNE loc_C4849D
BVS loc_C48449
PLP
.A16
RTS
; ---------------------------------------------------------------------------
loc_C484A7:
JSR a:.LOWORD(sub_C484B5)
JML f:loc_C4847F
; ---------------------------------------------------------------------------
loc_C484AE:
JSR a:.LOWORD(sub_C484B5)
JML f:loc_C48486
; End of function dboot_load_spc_program
.A16
.I16
sub_C484B5:
PHP
REP #$30
PHA
TYA
ORA #$8000
TAY
INC z:dboot_temp_pointer+2 - dboot_ram_start
PLA
PLP
RTS
; End of function sub_C484B5
.A16
.I16
send_apu_command_3e:
PHP
REP #$20
LDA #$3E
JSR a:.LOWORD(send_7_bit_data_on_apu_io_0)
JSR a:.LOWORD(apu_io2_related)
PLP
RTS
; End of function send_apu_command_3e
.A16
.I16
sub_C484D1:
PHP
REP #$20
LDA #$968
loc_C484D7:
CMP f:APU_I_O_PORT_2
BNE loc_C484D7
STZ z:$76
PLP
RTS
; End of function sub_C484D1
.A16
.I16
apu_io2_related:
PHP
REP #$20
LDA #0
STA f:APU_I_O_PORT_2
LDA #$265
loc_C484EE:
CMP f:APU_I_O_PORT_2
BNE loc_C484EE
PHA
LDA #0
STA f:APU_I_O_PORT_0
PLA
STA f:APU_I_O_PORT_2
PLP
RTS
; End of function apu_io2_related
.A16
.I16
send_7_bit_data_on_apu_io_0:
PHP
SEP #$20
.A8
STA z:dboot_internal_parameter - dboot_ram_start
LDA z:last_write_to_apu_io_0 - dboot_ram_start
loc_C4850A:
CMP f:APU_I_O_PORT_0
BNE loc_C4850A
LDA f:APU_I_O_PORT_0
EOR #$80 ; Toggle the last bit every write
AND #$80
ORA z:dboot_internal_parameter - dboot_ram_start
STA f:APU_I_O_PORT_0
STA z:last_write_to_apu_io_0 - dboot_ram_start
PLP