Time Pilot sound board
1982 by Centuri/Konami
TO DO: - Decompose music script into command text ; Z80 CPU and 2 AY-3-8910 Sound Chips ; The sound board receives commands from the game board through ; port A of one sound chip. The upper nibble of Port B is connected ; to an oscillator and drives sound timing. ; ; Sound board oscillator is 14.318MHz. The CPU and sound chips use ; the same division ... 14.31818 / 8 = 1.789772. ; ; The timer on the upper four bits of Port B reaches 0 at the main ; clock divided by 10240 (1024*10). ; ; Processing loop = 1.789772MHz / 10240 = 174.782421875Hz (0.005721399 sec per tick)
Sound Commands
; First number is command number ; Second is filter-capacitor configuration ; ; 00 Stop all sounds ; 01 0 Coin ; 02 0 Plane fire ; 03 0 1910 bomb ; 04 1 Missile launch ; 05 0 UFO shot ; 06 0 Missile (continuous) ; 07 0 User Fire ; 08 1 Enemy Explosion Component (thud) ; 09 1 Enemy Explosion Component (white-noise) ; 0A 0 Tracker or Bomb Explosion ; 0B 0 Squad Appears ; 0C 1 1st boss (blimp) ; 0D 1 2nd boss (jet) ; 0E 1 3rd boss (helicopter) ; 0F 1 4th boss (super jet) ; 10 1 5th boss (mother ship) ; 11 1 User explosion component ; 12 1 User explosion component ; 13 2 User explosion component ; 14 2 User explosion component ; 15 1 User explosion component ; 16 0 Pickup parachute ; 17 1 Free man ; 18 0 Time jump 1 ; 19 0 Time jump 2 ; 1A 0 Initialize song 2 ; 1B 1 Initialize song 1 ; 1C 0 Initialize music D1 ; 1D 0 Initialize music D2 ; 1E 0 Initialize music D3 ; 1F 0 Initialize music D4 ; 20 0 Initialize music D5
Start
Start: ; Reset/Startup 0000: 21 00 30 LD HL,$3000 ; Command buffer 0003: 06 00 LD B,$00 ; Fill value 0005: C3 9B 00 JP $009B ; Continue initialization
AYChipIO
RST8: ; Read CHIP0 register. A=register, return in A 0008: 32 00 50 LD (AY0_ADDR),A ; Store the register number 000B: 3A 00 40 LD A,(AY0_DATA) ; Read the value 000E: C9 RET ; Done 000F: FF RST $38 ; Filler to align RST routines RST10: ; Read CHIP1 register. A=register, retun in A 0010: 32 00 70 LD (AY1_ADDR),A ; Store the register number 0013: 3A 00 60 LD A,(AY1_DATA) ; Read the value 0016: C9 RET ; Done 0017: FF RST $38 ; Filler to align RST routines RST18: ; Write CHIP0 register. A=register, C=value 0018: 32 00 50 LD (AY0_ADDR),A ; Store register number 001B: 79 LD A,C ; Write ... 001C: 32 00 40 LD (AY0_DATA),A ; ... value 001F: C9 RET ; Done RST20: ; Write CHIP1 register. A=register, C=value 0020: 32 00 70 LD (AY1_ADDR),A ; Store register number 0023: 79 LD A,C ; Write ... 0024: 32 00 60 LD (AY1_DATA),A ; ... value 0027: C9 RET ; Done ; Vector to desired function indexed by A ; HL = address table ; A = index 0028: 87 ADD A,A ; *2 0029: 85 ADD A,L ; Add to offset 002A: 6F LD L,A ; Set LSB of pointer 002B: 7C LD A,H ; Carry into ... 002C: CE 00 ADC A,$00 ; ... MSB of pointer 002E: 67 LD H,A ; Set MSB of pointer 002F: 7E LD A,(HL) ; Get LSB of address 0030: 23 INC HL ; Next in table 0031: 66 LD H,(HL) ; Get MSB of address 0032: 6F LD L,A ; Get LSB of address 0033: E9 JP (HL) ; Jump to routine 0034: FF RST $38 ; Filler ... 0035: FF RST $38 ; ... 0036: FF RST $38 ; ... 0037: FF RST $38 ; ...
Interrupt
InterruptService: ; Called when the main CPU signals a new sound command. ; Switch banks and call the command fetch routine 0038: D9 EXX ; Switch banks B-L 0039: 08 EX AF,AF' ; Switch AF banks 003A: CD 40 00 CALL HandleCommand ; Make the call 003D: 08 EX AF,AF' ; Set the AF banks back 003E: D9 EXX ; Set the B-L banks back 003F: C9 RET ; Done
Command Buffer
The command Buffer is kept at 3000 and contains 6 2-byte entries. That's one entry for each hardware voice. The first of the two bytes is the command. A zero marks an available slot. The second byte indicates initialization status. 0=not initialized, 1=initialized. Note that entries are removed by setting them to 0000, which clears the initialized-flag for the next command.
The main CPU writes the command to Port A of sound chip 0 and triggers an interrupt in this code.
If the upper bit of the command is set, then that command is removed from the buffer if it is still playing. Command values above 0x20 are ignored.
Command 0 clears all six command slots thus stopping all sound.
If a command is already running, it is restarted.
If the command buffer is full, then the command numbers are used as priorities. The higher the command number, the higher the priority. If all commands in the buffer are of higher priority than the new command, then the new command is ignored. Otherwise the new command replaces the lowest priority command in the buffer.
HandleCommand: ; Fetch a command from the port and place it in the ; command buffer. 0040: 3E 0E LD A,$0E ; Port A 0042: CF RST $08 ; Read CHIP0 Port A 0043: B7 OR A ; If zero then ... 0044: 28 2F JR Z,StopAllCommands ; ... clear the entire buffer and out 0046: 57 LD D,A ; Hang on to command 0047: E6 7F AND $7F ; Mask off upper bit 0049: FE 21 CP $21 ; Compare command to 21 004B: D0 RET NC ; Ignore invalid commands (above 20) 004C: CB 7A BIT 7,D ; Is the upper bit set? 004E: 20 42 JR NZ,$92 ; Yes -- remove the command from the buffer 0050: CD 80 00 CALL FindCommand ; Is the command already in the buffer? 0053: 20 1C JR NZ,$71 ; Found ... restart it. 0055: CD 80 00 CALL FindCommand ; Find A=0 (empty slot) in the buffer 0058: 20 16 JR NZ,$70 ; Found a slot -- store command in buffer ; Find the lowest numbered command 005A: 21 00 30 LD HL,$3000 ; Buffer 005D: 1E 06 LD E,$06 ; 6 entries to check 005F: 7E LD A,(HL) ; Get command value 0060: 1D DEC E ; Count down 0061: 28 08 JR Z,$6B ; All checked ... done 0063: 2C INC L ; Bump to next ... 0064: 2C INC L ; ... entry 0065: BE CP (HL) ; Compare current lowest with next entry 0066: 38 F8 JR C,$60 ; Next entry is higher -- keep our lowest 0068: C3 5F 00 JP $005F ; New lowest value ; 006B: BA CP D ; Is the new command even lower? 006C: D0 RET NC ; Yes -- ignore the command ; Find entry, replace type with D and clear second byte 006D: CD 80 00 CALL FindCommand ; Find entry 0070: 72 LD (HL),D ; Store D 0071: 2C INC L ; Second byte in entry 0072: 36 00 LD (HL),$00 ; Flag command needs initializing 0074: C9 RET ; Done StopAllCommands: 0075: 21 00 30 LD HL,$3000 ; Clear 13 bytes ... 0078: 06 0C LD B,$0C ; ... starting at ... 007A: AF XOR A ; ... 007B: 77 LD (HL),A ; ... 007C: 2C INC L ; ... 007D: 10 FC DJNZ $7B ; ... 3000 007F: C9 RET ; Done FindCommand: ; Find entry A in buffer. Return slot number (1,2,3,4,5,6) and HL if found. ; If not found, return 0 0080: 21 00 30 LD HL,$3000 ; Buffer area 0083: 06 06 LD B,$06 ; 6 entries to check 0085: 0E 07 LD C,$07 ; Subtraction constant (never changes here) 0087: BE CP (HL) ; Is this the same command? 0088: 28 05 JR Z,$8F ; Yes -- done 008A: 2C INC L ; Bump to ... 008B: 2C INC L ; ... next entry 008C: 10 F9 DJNZ $87 ; Check all entries 008E: 41 LD B,C ; Not found -- ends up becoming 0 008F: 79 LD A,C ; Subtract remaining counter ... 0090: 90 SUB B ; ... from 7 0091: C9 RET ; Return slot number 0 or 1-6 ; Remove entry from buffer 0092: CD 80 00 CALL FindCommand ; Find entry 0095: C8 RET Z ; Not found -- out 0096: AF XOR A ; Fast 0 0097: 77 LD (HL),A ; Clear ... 0098: 2C INC L ; ... entry ... 0099: 77 LD (HL),A ; ... from buffer. 009A: C9 RET ; Out ; Initialization continued. ; Clear RAM 009B: 70 LD (HL),B ; Store 0 009C: 23 INC HL ; Bump pointer 009D: 7C LD A,H ; Clear until ... 009E: FE 34 CP $34 ; ... done 00A0: 20 F9 JR NZ,$9B ; Loop back 00A2: F9 LD SP,HL ; Set SP to 3400 00A3: ED 56 IM 1 ; Set interrupt MODE 1 (always vector to 0038) 00A5: 21 00 80 LD HL,$8000 ; All cap filters zero plus upper bit set. 00A8: 22 0C 30 LD (currentCaps),HL ; Keep up with write-only value 00AB: 77 LD (HL),A ; All caps disconnected from the channels ; Initialize sound chips 00AC: 0E 00 LD C,$00 ; Amplitude value 0 00AE: 16 06 LD D,$06 ; 6 voices 00B0: 7A LD A,D ; Pass to function 00B1: CD 9C 01 CALL $019C ; Channel x to 0. (Amplitude to silence.) 00B4: 15 DEC D ; Silence all ... 00B5: 20 F9 JR NZ,$B0 ; ... six voices 00B7: 0E 38 LD C,$38 ; Both IO Ports IN, Tones only on ... 00B9: 3E 07 LD A,$07 ; ... all voices. 00BB: DF RST $18 ; Configure AY38910 chip 0 00BC: 3E 07 LD A,$07 ; "Enable" register again 00BE: E7 RST $20 ; Configure AY38910 chip 1
Main Loop
MainLoop: ; Use the upper nibble of chip 0 port B as a counter. When it reaches 0, ; then process all the voices. This is happens at approximately 175Hz. 00BF: FB EI ; Enable interrupts 00C0: 3E 0F LD A,$0F ; Port B 00C2: CF RST $08 ; Read CHIP0 Port B 00C3: E6 F0 AND $F0 ; Timer value hit? 00C5: 20 F9 JR NZ,$C0 ; No -- keep waiting ; Process Entry Index 1 00C7: F3 DI ; Disable interrupts 00C8: 3E 01 LD A,$01 ; Voice index 1 00CA: 32 0E 30 LD ($300E),A ; Hang onto it 00CD: 3A 01 30 LD A,(commandBuffer+1) ; First voice, 2nd byte 00D0: B7 OR A ; Set flags about 2nd byte 00D1: 3A 00 30 LD A,(commandBuffer) ; Get command (no flags) 00D4: 28 06 JR Z,$DC ; 2nd byte == 0 00D6: CD 7F 01 CALL ContinueCommand ; Continue command 00D9: C3 DF 00 JP $00DF ; Skip over 00DC: CD 69 01 CALL InitCommand ; Initialize command 00DF: FB EI ; Enable interrupts 00E0: 00 NOP ; Probably to make all the index handlers the ... 00E1: 00 NOP ; ... same number of bytes (the last one is 2 bytes longer). ; Process Entry Index 2 (see Index 1 above) 00E2: F3 DI ; 00E3: 3E 02 LD A,$02 ; 00E5: 32 0E 30 LD ($300E),A ; 00E8: 3A 03 30 LD A,(commandBuffer+3) ; 00EB: B7 OR A ; 00EC: 3A 02 30 LD A,(commandBuffer+2) ; 00EF: 28 06 JR Z,$F7 ; Same as index 1 00F1: CD 7F 01 CALL ContinueCommand ; 00F4: C3 FA 00 JP $00FA ; 00F7: CD 69 01 CALL InitCommand ; 00FA: FB EI ; 00FB: 00 NOP ; 00FC: 00 NOP ; ; Process Entry Index 3 (see Index 1 above) 00FD: F3 DI ; 00FE: 3E 03 LD A,$03 ; 0100: 32 0E 30 LD ($300E),A ; 0103: 3A 05 30 LD A,(commandBuffer+5) ; 0106: B7 OR A ; 0107: 3A 04 30 LD A,(commandBuffer+4) ; 010A: 28 06 JR Z,$112 ; Same as index 1 010C: CD 7F 01 CALL ContinueCommand ; 010F: C3 15 01 JP $0115 ; 0112: CD 69 01 CALL InitCommand ; 0115: FB EI ; 0116: 00 NOP ; 0117: 00 NOP ; ; Process Entry Index 4 (see Index 1 above) 0118: F3 DI ; 0119: 3E 04 LD A,$04 ; 011B: 32 0E 30 LD ($300E),A ; 011E: 3A 07 30 LD A,(commandBuffer+7) ; 0121: B7 OR A ; 0122: 3A 06 30 LD A,(commandBuffer+6) ; 0125: 28 06 JR Z,$12D ; 0127: CD 7F 01 CALL ContinueCommand ; Same as index 1 012A: C3 30 01 JP $0130 ; 012D: CD 69 01 CALL InitCommand ; 0130: FB EI ; 0131: 00 NOP ; 0132: 00 NOP ; ; Process Entry Index 5 (see Index 1 above) 0133: F3 DI ; 0134: 3E 05 LD A,$05 ; 0136: 32 0E 30 LD ($300E),A ; 0139: 3A 09 30 LD A,(commandBuffer+9) ; 013C: B7 OR A ; 013D: 3A 08 30 LD A,(commandBuffer+8) ; 0140: 28 06 JR Z,$148 ; Same as index 1 0142: CD 7F 01 CALL ContinueCommand ; 0145: C3 4B 01 JP $014B ; 0148: CD 69 01 CALL InitCommand ; 014B: FB EI ; 014C: 00 NOP ; 014D: 00 NOP ; ; Process Entry Index 6 (see Index 1 above) 014E: F3 DI ; 014F: 3E 06 LD A,$06 ; 0151: 32 0E 30 LD ($300E),A ; 0154: 3A 0B 30 LD A,(commandBuffer+B) ; 0157: B7 OR A ; 0158: 3A 0A 30 LD A,(commandBuffer+A) ; 015B: 28 06 JR Z,$163 ; Same as index 1 015D: CD 7F 01 CALL ContinueCommand ; 0160: C3 BF 00 JP MainLoop ; Back to the main loop 0163: CD 69 01 CALL InitCommand ; ; The upper nibble in B should be non-zero by now. 0166: C3 BF 00 JP MainLoop ; Continue main loop InitCommand: ; Initialize command and flag it initialized ; Vector to command. If return is 0, set second byte to 1. If return ; is not 0, remove the command from the buffer. 0169: 21 92 0A LD HL,$0A92 ; Jump table 016C: EF RST $28 ; Vector to address A in table HL 016D: B7 OR A ; Test return 016E: 20 17 JR NZ,$187 ; Remove the command 0170: 21 01 30 LD HL,$3001 ; Command buffer (2nd bytes) 0173: 3A 0E 30 LD A,($300E) ; Index of command 0176: 3D DEC A ; Convert to ... 0177: 87 ADD A,A ; ... pointer 0178: 5F LD E,A ; LSB 0179: 16 00 LD D,$00 ; MSB=0 017B: 19 ADD HL,DE ; Pointer to command 2nd byte 017C: 36 01 LD (HL),$01 ; Set second byte to 1 017E: C9 RET ; Done ContinueCommand: ; Continue processing a command ; Vector to command. If return is 0, leave buffer alone. If return ; is not 0, remove command from buffer. ; The vector table for "continues" does have an entry for "0" even ; though the initialization does (it clears the voice). I would have ; pointed the "continue" for command 0 at a return-zero for consistency. Then ; no special check would be needed here. 017F: B7 OR A ; If slot is empty ... 0180: C8 RET Z ; ... do nothing 0181: 21 D4 0A LD HL,$0AD4 ; Jump table 0184: EF RST $28 ; Vector to address A in table HL 0185: B7 OR A ; Test return 0186: C8 RET Z ; If zero -- out ; 0187: 21 00 30 LD HL,$3000 ; Command buffer 018A: 3A 0E 30 LD A,($300E) ; Index of command 018D: 3D DEC A ; Convert to ... 018E: 87 ADD A,A ; ... pointer 018F: 4F LD C,A ; LSB 0190: 06 00 LD B,$00 ; MSB=0 0192: 09 ADD HL,BC ; Pointer to command 0193: 70 LD (HL),B ; Clear command type 0194: 2C INC L ; Next byte 0195: 70 LD (HL),B ; Clear second byte 0196: C9 RET ; Done
Command 00 Silence
Command00: ; Silence ; Initialize Routine Vector 00 (Silence the channel) 0197: 0E 00 LD C,$00 ; Silence the voice ; Write to amplitude control of given voice 0199: 3A 0E 30 LD A,($300E) ; Get voice number 019C: FE 04 CP $04 ; Voice 4-6 019E: 30 05 JR NC,$1A5 ; Yes -- do chip 1 01A0: C6 07 ADD A,$07 ; Add 7 (8,9, or 10) 01A2: C3 18 00 JP RST18 ; Write C to reg A chip 0 01A5: C6 04 ADD A,$04 ; Add 4 (8,9, or 10) 01A7: C3 20 00 JP RST20 ; Write C to reg A chip 1 ; Write to tone registers for the specified voice. ; Write HL = value, voice (1-3 Chip0, 4-6 Chip1) 01AA: 3A 0E 30 LD A,($300E) ; Get register 01AD: FE 04 CP $04 ; Register 4-6 01AF: 30 0B JR NC,$1BC ; Yes ... next chip 01B1: 3D DEC A ; -1 01B2: 87 ADD A,A ; *2 01B3: 47 LD B,A ; Hold onto register 01B4: 4D LD C,L ; Value 01B5: DF RST $18 ; Write Chip 0 01B6: 78 LD A,B ; Restore register 01B7: 3C INC A ; Next 01B8: 4C LD C,H ; Value 01B9: C3 18 00 JP RST18 ; Write Chip 0 01BC: D6 04 SUB $04 ; Registers in chip 1 01BE: 87 ADD A,A ; ... 01BF: 47 LD B,A ; ... 01C0: 4D LD C,L ; ... 01C1: E7 RST $20 ; ... 01C2: 78 LD A,B ; ... 01C3: 3C INC A ; ... 01C4: 4C LD C,H ; ... 01C5: C3 20 00 JP RST20 ; Done
FilterCaps
There are two capacitors that can be switched onto each audio channel to ground. The MSB bit set to one selects a 0.22 and the LSB bit set selects a 0.047 cap. Most effects just switch out the caps (writing 00), but the explosion effects switch in one or the other (never both).
- V1 1000xxxxAAxxxxxx
- V2 1000xxAAxxxxxxxx
- V3 1000AAxxxxxxxxxx
- V4 1000xxxxxxxxxxAA
- V5 1000xxxxxxxxAAxx
- V6 1000xxxxxxAAxxxx
SetFilterCaps: ; Reverse A bits 01C8: 01 FC FF LD BC,$FFFC ; 11111111 11111100 01CB: 21 00 00 LD HL,$0000 ; Clear HL 01CE: 1F RRA ; Bit 0 ... 01CF: CB 15 RL L ; ... into L 01D1: 1F RRA ; Bit 1 ... 01D2: CB 15 RL L ; ... into L ; Move bits and calculate mask ; V=1 HL*=64 BC=1111111100111111 ; 2 HL*=256 BC=1111110011111111 ; 3 HL*=1024 BC=1111001111111111 ; 4 HL*=1 BC=1111111111111100 ; 5 HL*=4 BC=1111111111110011 ; 6 HL*=16 BC=1111111111001111 01D4: 3A 0E 30 LD A,($300E) ; Voice number 01D7: C6 02 ADD A,$02 ; 2 bits in field 01D9: FE 06 CP $06 ; Split the field map 01DB: 38 04 JR C,$1E1 ; ... 01DD: D6 06 SUB $06 ; ... 01DF: 28 0A JR Z,$1EB ; ... 01E1: 87 ADD A,A ; = number of moves 01E2: 29 ADD HL,HL ; HL * 2 01E3: 37 SCF ; Set carry flag 01E4: CB 11 RL C ; Roll ... 01E6: CB 10 RL B ; ... the mask 01E8: 3D DEC A ; Position counter 01E9: 20 F7 JR NZ,$1E2 ; Complete the pattern ; CurrentValue = (CurrentValue & Mask) | HL 01EB: EB EX DE,HL ; HL->DE 01EC: 2A 0C 30 LD HL,(currentCaps) ; Old value 01EF: 7D LD A,L ; LSB 01F0: A1 AND C ; Mask 01F1: B3 OR E ; OR in old value 01F2: 6F LD L,A ; New LSB 01F3: 7C LD A,H ; MSB 01F4: A0 AND B ; Mask 01F5: B2 OR D ; OR in old value 01F6: 67 LD H,A ; New MSB 01F7: 22 0C 30 LD (currentCaps),HL ; New configuration value 01FA: 77 LD (HL),A ; Write the new filter value (the address value) ... 01FB: C9 RET ; ... to the latches
Music Processing
Offset 00: The first byte is the currently playing note. The upper 3 bits define the duration: 7=64th note, 6=32nd, 5=16th, 4=8th, 3=quarter note, 2=half note, and 1=whole note. A value of 0 is not allowed.
01: The second byte is the base delay for all notes in the song. This is the reload value of the delay counter. Thus a lower value speeds up all notes in the song. This value remains constant while the song plays.
The lower 5 bits of the first byte define the note number. This is added to the song's base note number in bytes 4 and 5. Thus some songs can be higher on the scale than other songs. This value changes with each new note in the song.
A note value of all 0s is a rest.
A note value of all 1s indicates a special music command. The command is processed and the next note is immediately processed. This allows several special commands to be handled at once. If the note value is all 1s then the MSB is the special command. The next value in the song is the data used to:
- MSB=0 Load base note table pointer from music
- 1 Load base delay from music
- 2 Load volume from music
- 3 Load volume modification from music
- 4 End of song
- 5 End of song
- 6 Jump to new music address
- 7 End of song
02,03: The Music Pointer points to the next byte in the song to process. This is the song's "program counter". This value changes as the song moves from note to note.
04,05: The Base Note Table Pointer points to the start of an octave in the note table. All notes in the song are relative to this base. This value remains constant while the song plays.
06: The initial amplitude is the initial volume of each note when the note begins. The amplitude is modified as the note plays by the value in byte 09. This initial value for all notes remains constant while the song plays.
07: The running amplitude is the current volume level of the currently playing note. This value is modified every other MSB delay count until the note's duration is over or the value is at a minimum (and thus changing it would wrap the value).
08: This is the duration delay count for the currently playing note. When this value reaches zero, it is reloaded with the value in 01 and the MSB is decremented. When the MSB reaches 0, the next note is played.
09: This is the value used to modify each note's amplitude every other MSB tick. This value remains constant for every note over the entire song.
MusicProcessing: ; Process Music Descriptor ; Amplitude of a note is reduced at a rate of 0.5 the MSB delay. 01FC: DD 35 01 DEC (IX+$01) ; Decrement base delay count 01FF: C0 RET NZ ; Not time for new note -- out 0200: DD 7E 08 LD A,(IX+$08) ; Reload ... 0203: DD 77 01 LD (IX+$01),A ; ... base delay 0206: DD 35 00 DEC (IX+$00) ; Decrement MSB of delay 0209: 28 15 JR Z,$220 ; Load next note ; 020B: DD CB 00 46 BIT 0,(IX+$00) ; Test bit 0 of MSB of delay 020F: C8 RET Z ; Not time to fool with volume 0210: DD 7E 09 LD A,(IX+$09) ; Get volume modifier 0213: B7 OR A ; Test it 0214: C8 RET Z ; No modification ... out 0215: DD 86 07 ADD A,(IX+$07) ; Modify current volume. 0218: F8 RET M ; Ignore it if it wrapped 0219: DD 77 07 LD (IX+$07),A ; New amplitude 021C: 4F LD C,A ; To C 021D: C3 99 01 JP $0199 ; Set amplitude and out ; ; Load next note 0220: DD 6E 02 LD L,(IX+$02) ; LSB of music pointer 0223: DD 66 03 LD H,(IX+$03) ; MSB of music pointer 0226: 7E LD A,(HL) ; Get next command 0227: 57 LD D,A ; Hang onto it 0228: E6 1F AND $1F ; Mask out note 022A: 28 24 JR Z,$250 ; Note 0? Just set delay 022C: FE 1F CP $1F ; Special command? 022E: 28 37 JR Z,$267 ; Yes ... process special command. 0230: CD 50 02 CALL $0250 ; Regular note -- set delay 0233: 7A LD A,D ; Get note 0234: E6 1F AND $1F ; Mask off upper 3 bits 0236: 3D DEC A ; -1 (0 is not a note) 0237: 07 RLCA ; *2 (2 bytes per note) 0238: 4F LD C,A ; Hold it 0239: DD 6E 04 LD L,(IX+$04) ; Base pointer into ... 023C: DD 66 05 LD H,(IX+$05) ; ... note table 023F: 09 ADD HL,BC ; B got set to 0 in the delay set! 0240: 5E LD E,(HL) ; Get tone ... 0241: 23 INC HL ; ... value ... 0242: 56 LD D,(HL) ; ... from table 0243: EB EX DE,HL ; To HL 0244: CD AA 01 CALL $01AA ; Write tone 0247: DD 4E 06 LD C,(IX+$06) ; Get amplitude 024A: DD 71 07 LD (IX+$07),C ; Initialize running amplitude 024D: C3 99 01 JP $0199 ; Set amplitude and out ; Convert next byte to power of 2 and store as delay MSB 0250: 23 INC HL ; Next byte in music 0251: DD 75 02 LD (IX+$02),L ; Update ... 0254: DD 74 03 LD (IX+$03),H ; ... music pointer 0257: 7A LD A,D ; Restore command 0258: E6 E0 AND $E0 ; Mask off lower 5 bits 025A: 07 RLCA ; Move upper three bits ... 025B: 07 RLCA ; ... 025C: 07 RLCA ; ... to lower bits. 025D: 47 LD B,A ; Save it 025E: 3E 80 LD A,$80 ; One bit 0260: 07 RLCA ; Set bit position ... 0261: 10 FD DJNZ $260 ; ... B 0263: DD 77 00 LD (IX+$00),A ; Store to MSB delay 0266: C9 RET ; Done ; Music byte xxx11111 (special command) ; Vector to function xxx and continue processing 0267: 7A LD A,D ; Restore command 0268: E6 E0 AND $E0 ; Mask off lower bits 026A: 07 RLCA ; Move upper ... 026B: 07 RLCA ; ... three bits ... 026C: 07 RLCA ; ... to low end 026D: 11 20 02 LD DE,$0220 ; Return to process ... 0270: D5 PUSH DE ; ... next command 0271: 23 INC HL ; Bump music pointer 0272: 5D LD E,L ; Hold ... 0273: 54 LD D,H ; ... pointer 0274: 23 INC HL ; Next 0275: DD 75 02 LD (IX+$02),L ; Save ... 0278: DD 74 03 LD (IX+$03),H ; ... music pointer 027B: 21 81 02 LD HL,$0281 ; Jump table 027E: C3 28 00 JP $0028 ; Do command and continue with next ; Music commands (DE contains pointer to 2nd byte) 0281: 91 02 ; 0 Load base note table pointer from music 0283: A5 02 ; 1 Load LSB delay from music 0285: B5 02 ; 2 Load amplitude from music 0287: BA 02 ; 3 Load amplitude modification from music 0289: C9 02 ; 4 End of song 028B: C9 02 ; 5 End of song 028D: BF 02 ; 6 Jump to new music address 028F: C9 02 ; 7 End of song MusicCmd0: ; Load base note table pointer ; 2 bytes 0291: EB EX DE,HL ; Pointer to second byte 0292: 4E LD C,(HL) ; Get second byte 0293: CB 21 SLA C ; *2 0295: 06 00 LD B,$00 ; MSB = 0 0297: 21 CE 02 LD HL,$02CE ; Base pointers 029A: 09 ADD HL,BC ; Offset into table 029B: 5E LD E,(HL) ; Get byte 029C: 23 INC HL ; Next 029D: 56 LD D,(HL) ; Get byte 029E: DD 73 04 LD (IX+$04),E ; Store ... 02A1: DD 72 05 LD (IX+$05),D ; ... tone pointer 02A4: C9 RET ; MusicCmd1: ; Load delay from table. ?? why not just store the delay value in the song and ; skip the table lookup? 02A5: EB EX DE,HL ; Second byte pointer 02A6: 4E LD C,(HL) ; Get second byte 02A7: 06 00 LD B,$00 ; MSB = 0 02A9: 21 66 03 LD HL,$0366 ; Data 02AC: 09 ADD HL,BC ; Point to entry 02AD: 7E LD A,(HL) ; Get data 02AE: DD 77 08 LD (IX+$08),A ; Delay 02B1: DD 77 01 LD (IX+$01),A ; Delay 02B4: C9 RET ; Done MusicCmd2: ; Load amplitude 02B5: 1A LD A,(DE) ; Get second byte 02B6: DD 77 06 LD (IX+$06),A ; Store it to amplitude 02B9: C9 RET ; Done MusicCmd3: ; Set 09 Amplitude modification 02BA: 1A LD A,(DE) ; Get second byte 02BB: DD 77 09 LD (IX+$09),A ; Store it to modification value 02BE: C9 RET ; Done MusicCmd6: ; Jump to new music address 02BF: 1A LD A,(DE) ; Get second byte 02C0: DD 77 02 LD (IX+$02),A ; Set ... 02C3: 13 INC DE ; ... 02C4: 1A LD A,(DE) ; ... 02C5: DD 77 03 LD (IX+$03),A ; ... new pointer 02C8: C9 RET ; Done MusicCmd4: MusicCmd5: MusicCmd7: ; End this song 02C9: E1 POP HL ; Clear for return ... 02CA: E1 POP HL ; ... from music routine 02CB: 3E FF LD A,$FF ; Flag end of processing 02CD: C9 RET ; Done BaseNotePtrs: ; Base offsets into note table. The notes in a song are relative ; to these pointers into the note table. 02CE: EE 02 ; Lowest note (Would be G#1) 02D0: F2 02 ; A#1 ; 02D2: F6 02 ; C2 02D4: FA 02 ; D2 02D6: FE 02 ; E2 02D8: 02 03 ; F#2 02DA: 06 03 ; G#2 02DC: 0A 03 ; A#2 ; 02DE: 0E 03 ; C3 02E0: 12 03 ; D3 02E2: 16 03 ; E3 02E4: 1A 03 ; F#3 02E6: 1E 03 ; G#3 02E8: 22 03 ; A#3 ; 02EA: 26 03 ; C4 02EC: 2A 03 ; D4 NoteTable: ; Note Table -- tones for notes on the chromatic scale ; Frequency is 1789772 / (16 * value) ; ; Value Freq MIDI Note Ideal Freq 02EE: FF 0F ; 4095 27.31 x x x 02F0: F2 07 ; 2034 54.99 33 A1 55.00 02F2: 80 07 ; 1920 58.26 34 A#1/Bb1 58.27 02F4: 14 07 ; 1812 61.73 35 B1 61.74 02F6: AE 06 ; 1710 65.41 36 C2 65.41 02F8: 4E 06 ; 1614 69.30 37 C#2/Db2 69.30 02FA: F3 05 ; 1523 73.44 38 D2 73.42 02FC: 9E 05 ; 1438 77.78 39 D#2/Eb2 77.78 02FE: 4E 05 ; 1358 82.37 40 E2 82.41 0300: 01 05 ; 1281 87.32 41 F2 87.31 0302: B9 04 ; 1209 92.52 42 F#2/Gb2 92.50 0304: 76 04 ; 1142 97.95 43 G2 98.00 0306: 36 04 ; 1078 103.76 44 G#2/Ab2 103.83 0308: F9 03 ; 1017 109.99 45 A2 110.00 030A: C0 03 ; 960 116.52 46 A#2/Bb2 116.54 030C: 8A 03 ; 906 123.46 47 B2 123.47 030E: 57 03 ; 855 130.83 48 C3 130.81 0310: 27 03 ; 807 138.61 49 C#3/Db3 138.59 0312: FA 02 ; 762 146.79 50 D3 146.83 0314: CF 02 ; 719 155.57 51 D#3/Eb3 155.56 0316: A7 02 ; 679 164.74 52 E3 164.81 0318: 81 02 ; 641 174.50 53 F3 174.61 031A: 5D 02 ; 605 184.89 54 F#3/Gb3 185.00 031C: 3B 02 ; 571 195.90 55 G3 196.00 031E: 1B 02 ; 539 207.53 56 G#3/Ab3 207.65 0320: FD 01 ; 509 219.76 57 A3 220.00 0322: E0 01 ; 480 233.04 58 A#3/Bb3 233.08 0324: C5 01 ; 453 246.93 59 B3 246.94 0326: AC 01 ; 428 261.35 60 C4 261.63 (middle C) 0328: 94 01 ; 404 276.88 61 C#4/Db4 277.18 032A: 7D 01 ; 381 293.59 62 D4 293.66 032C: 68 01 ; 360 310.72 63 D#4/Eb4 311.13 032E: 53 01 ; 339 329.97 64 E4 329.63 0330: 40 01 ; 320 349.56 65 F4 349.23 0332: 2E 01 ; 302 370.39 66 F#4/Gb4 369.99 0334: 1D 01 ; 285 392.49 67 G4 392.00 0336: 0D 01 ; 269 415.83 68 G#4/Ab4 415.30 0338: FE 00 ; 254 440.39 69 A4 440.00 (concert pitch) 033A: F0 00 ; 240 466.08 70 A#4/Bb4 466.16 033C: E3 00 ; 227 492.76 71 B4 493.88 033E: D6 00 ; 214 522.71 72 C5 523.25 0340: CA 00 ; 202 553.76 73 C#5/Db5 554.37 0342: BE 00 ; 190 588.74 74 D5 587.33 0344: B4 00 ; 180 621.44 75 D#5/Eb5 622.25 0346: AA 00 ; 170 658.00 76 E5 659.26 0348: A0 00 ; 160 699.12 77 F5 698.46 034A: 97 00 ; 151 740.79 78 F#5/Gb5 739.99 034C: 8F 00 ; 143 782.24 79 G5 783.99 034E: 87 00 ; 135 828.59 80 G#5/Ab 830.61 0350: 7F 00 ; 127 880.79 81 A5 880.00 0352: 78 00 ; 120 932.17 82 A#5/Bb5 932.33 0354: 71 00 ; 113 989.91 83 B5 987.77 0356: 6B 00 ; 107 1045.42 84 C6 1046.50 0358: 65 00 ; 101 1107.53 85 C#6/Db6 1108.73 035A: 5F 00 ; 95 1177.48 86 D6 1174.66 035C: 5A 00 ; 90 1242.89 87 D#6/Eb6 1244.51 035E: 55 00 ; 85 1316.00 88 E6 1318.51 0360: 50 00 ; 80 1398.25 89 F6 1396.91 0362: 4C 00 ; 76 1471.85 90 F#6/Gb6 1479.98 0364: 07 00 ; 7 15980.10 x x x DelayTable: ; 24 fixed base-delay values. ?? The music command could just ; store this one byte value instead of storing a one byte index ; into this table. 0366: 3C 38 34 30 2C 28 24 20 1E 1C 1A 18 0372: 16 14 12 10 0F 0E 0D 0C 0B 0A 09 08 InitSong: ; Initialize descriptors for a specified song number in A 037E: 21 B5 03 LD HL,$03B5 ; Initialization data 0381: 11 0F 30 LD DE,$300F ; First music descriptor 0384: 01 32 00 LD BC,$0032 ; $32 = d50 = 10*5 = 50 bytes (5 descriptors) 0387: ED B0 LDIR ; Initialize the data ; ; Song number * 10 (5 music pointers, 2 bytes each) 0389: 87 ADD A,A ; A*2 038A: 4F LD C,A ; Hold 038B: 87 ADD A,A ; A*4 038C: 87 ADD A,A ; A*8 038D: 81 ADD A,C ; A*10 038E: 4F LD C,A ; Hold it 038F: 06 00 LD B,$00 ; MSB = 0 0391: 21 6E 0B LD HL,$0B6E ; Data region 0394: 09 ADD HL,BC ; Point to song 0395: 11 11 30 LD DE,$3011 ; Music pointer descriptor 1 0398: ED A0 LDI ; Set ... 039A: ED A0 LDI ; ... pointer 039C: 1E 1B LD E,$1B ; Music pointer descriptor 2 039E: ED A0 LDI ; Set ... 03A0: ED A0 LDI ; ... pointer 03A2: 1E 25 LD E,$25 ; Music pointer descriptor 3 03A4: ED A0 LDI ; Set ... 03A6: ED A0 LDI ; ... pointer 03A8: 1E 2F LD E,$2F ; Music pointer descriptor 4 03AA: ED A0 LDI ; Set ... 03AC: ED A0 LDI ; ... pointer 03AE: 1E 39 LD E,$39 ; Music pointer descriptor 5 03B0: ED A0 LDI ; Set ... 03B2: ED A0 LDI ; ... pointer 03B4: C9 RET ; Done SongDescInit: ; Initialization data for music descriptors (10 bytes each) ; Note=Rest, MSB=reload, LSB=reload, AmpMod=-1 03B5: 01 01 00 00 00 00 00 00 00 FF 03BF: 01 01 00 00 00 00 00 00 00 FF 03C9: 01 01 00 00 00 00 00 00 00 FF 03D3: 01 01 00 00 00 00 00 00 00 FF 03DD: 01 01 00 00 00 00 00 00 00 FF ; The sounds produced by this code were discovered by modifying ; the game code ROM to play a single sound and go into an infinite ; loop. The modified code was run through the MAME emulator.
Command 01
Coin drop
Command01: ; Initialize Routine Vector 01 (Coin Drop) 03E7: AF XOR A ; No ... 03E8: CD C8 01 CALL SetFilterCaps ; ... capacitors 03EB: 21 6B 00 LD HL,$006B ; Fine=6B, Coars=00 03EE: CD AA 01 CALL $01AA ; Write to tone registers 03F1: 21 41 30 LD HL,$3041 ; 03F4: 36 00 LD (HL),$00 ; 03F6: 2C INC L ; 03F7: 36 47 LD (HL),$47 ; 03F9: 2C INC L ; 03FA: 0E 09 LD C,$09 ; Amplitude 03FC: 71 LD (HL),C ; 03FD: CD 99 01 CALL $0199 ; Set amplitude 0400: AF XOR A ; Return 0 0401: C9 RET ; Done ; Continue Sound Routine Vector 01 (Coin Drop) 0402: 21 41 30 LD HL,$3041 ; 0405: 35 DEC (HL) ; 0406: 7E LD A,(HL) ; 0407: E6 03 AND $03 ; 0409: 20 18 JR NZ,$423 ; 040B: 2C INC L ; 040C: 35 DEC (HL) ; 040D: 7E LD A,(HL) ; 040E: 28 1D JR Z,$42D ; Return 1 0410: E6 07 AND $07 ; 0412: 28 11 JR Z,$425 ; 0414: E6 03 AND $03 ; 0416: 3D DEC A ; 0417: 4F LD C,A ; 0418: 06 00 LD B,$00 ; 041A: 21 2F 04 LD HL,$042F ; 041D: 09 ADD HL,BC ; 041E: 6E LD L,(HL) ; 041F: 60 LD H,B ; 0420: CD AA 01 CALL $01AA ; Write tone registers 0423: AF XOR A ; Return 0 0424: C9 RET ; Out 0425: 2C INC L ; 0426: 35 DEC (HL) ; 0427: 4E LD C,(HL) ; 0428: CD 99 01 CALL $0199 ; Set amplitude 042B: AF XOR A ; Return 0 042C: C9 RET ; Out 042D: 3D DEC A ; Zero becomes FF 042E: C9 RET ; Done 042F: 47 55 6B
Command 02
Command02: ; Initialization Vector Routine 02 (Plane Fire) 0432: AF XOR A ; A=0 0433: CD C8 01 CALL SetFilterCaps ; No filter caps on channel 0436: 0E 0A LD C,$0A ; Set volume ... 0438: CD 99 01 CALL $0199 ; ... to 10 043B: 3E 80 LD A,$80 ; Loop count ... 043D: 32 44 30 LD (?command02?),A ; ... is 128 0440: 21 04 00 LD HL,$0004 ; Initial frequency ... 0443: 22 45 30 LD (?command02?+1),HL ; ... is 4 0446: CD AA 01 CALL $01AA ; Write tone (HL=tone) 0449: AF XOR A ; Return a 0 (continue) 044A: C9 RET ; ; Continue Sound Routine Vector 02 (Plane Fire) 044B: 21 44 30 LD HL,$3044 ; Decrement ... 044E: 35 DEC (HL) ; ... counter 044F: 7E LD A,(HL) ; Stop if ... 0450: 28 0E JR Z,$460 ; ... done 0452: FE 6D CP $6D ; At loop value 6D ... 0454: 28 EA JR Z,$440 ; ... reset frequency to 4 0456: 2A 45 30 LD HL,(?command02?+1) ; Current tone value 0459: 01 18 00 LD BC,$0018 ; Add ... 045C: 09 ADD HL,BC ; ... 18 to frequency 045D: C3 43 04 JP $0443 ; Store and play tone 0460: 3D DEC A ; Return ... 0461: C9 RET ; ... -1 (finished)
Command 03
Command03: ; Initialization Routine Vector 03 (1910 Bomb) 0462: AF XOR A ; No filter ... 0463: CD C8 01 CALL SetFilterCaps ; ... caps on channel 0466: 21 C0 00 LD HL,$00C0 ; Inital ... 0469: 22 47 30 LD (?command03?),HL ; ... tone 046C: CD AA 01 CALL $01AA ; Write tone 046F: 0E 09 LD C,$09 ; Set ... 0471: CD 99 01 CALL $0199 ; ... volume 0474: AF XOR A ; Set ... 0475: 21 49 30 LD HL,$3049 ; ... 3049 = 0 ... 0478: 77 LD (HL),A ; ... 0479: C9 RET ; ; Continue Sound Routine Vector 03 (1910 Bomb) 047A: 21 49 30 LD HL,$3049 ; Decrement ... 047D: 35 DEC (HL) ; ... counter 047E: 7E LD A,(HL) ; Do nothing ... 047F: E6 07 AND $07 ; ... until MSB ... 0481: 20 12 JR NZ,$495 ; ... is 0 0483: 2A 47 30 LD HL,(?command03?) ; Add ... 0486: 01 40 00 LD BC,$0040 ; ... 40 ... 0489: 09 ADD HL,BC ; ... to tone 048A: 7C LD A,H ; When MSB is ... 048B: FE 0C CP $0C ; ... 0C ... 048D: 28 08 JR Z,$497 ; ... the effect is done 048F: 22 47 30 LD (?command03?),HL ; Store new tone 0492: CD AA 01 CALL $01AA ; Write tone 0495: AF XOR A ; Continue 0496: C9 RET ; 0497: 3E FF LD A,$FF ; Done 0499: C9 RET ;
Command 04
Command04: ; Initialization Routine Vector 04 (Missile Launch) 049A: 3E 01 LD A,$01 ; 049C: CD C8 01 CALL SetFilterCaps ; 049F: 21 4A 30 LD HL,$304A ; 04A2: 36 00 LD (HL),$00 ; 04A4: 2C INC L ; 04A5: 0E 0F LD C,$0F ; 04A7: 71 LD (HL),C ; 04A8: CD 99 01 CALL $0199 ; Set volume 04AB: 21 60 00 LD HL,$0060 ; 04AE: 22 4C 30 LD (?command04?+2),HL ; 04B1: AF XOR A ; 04B2: C9 RET ; ; Continue Sound Routine Vector 04 (Missile Launch) 04B3: 21 4A 30 LD HL,$304A ; 04B6: 35 DEC (HL) ; 04B7: 7E LD A,(HL) ; 04B8: E6 0F AND $0F ; 04BA: 28 16 JR Z,$4D2 ; 04BC: 2A 4C 30 LD HL,(?command04?+2) ; 04BF: FE 0C CP $0C ; 04C1: 01 10 00 LD BC,$0010 ; 04C4: 30 03 JR NC,$4C9 ; 04C6: 01 D0 FF LD BC,$FFD0 ; 04C9: 09 ADD HL,BC ; 04CA: 22 4C 30 LD (?command04?+2),HL ; 04CD: CD AA 01 CALL $01AA ; Write tone 04D0: AF XOR A ; 04D1: C9 RET ; 04D2: 2C INC L ; 04D3: 35 DEC (HL) ; 04D4: 4E LD C,(HL) ; 04D5: 20 D1 JR NZ,$4A8 ; 04D7: 3D DEC A ; 04D8: C9 RET ;
Command 05
Command05: ; Initialization Routine Vector 05 (Missile - continuous) 04D9: AF XOR A ; 04DA: CD C8 01 CALL SetFilterCaps ; 04DD: 21 4E 30 LD HL,$304E ; 04E0: 36 B0 LD (HL),$B0 ; 04E2: 2C INC L ; 04E3: 36 0D LD (HL),$0D ; 04E5: 35 DEC (HL) ; 04E6: 4E LD C,(HL) ; 04E7: CD 99 01 CALL $0199 ; Set volume 04EA: 2C INC L ; 04EB: 36 20 LD (HL),$20 ; 04ED: 6E LD L,(HL) ; 04EE: 26 00 LD H,$00 ; 04F0: CD AA 01 CALL $01AA ; Write tone 04F3: AF XOR A ; 04F4: C9 RET ; ; Continue Sound Routine Vector 05 (Missile - continuous) 04F5: 21 4E 30 LD HL,$304E ; 04F8: 35 DEC (HL) ; 04F9: 7E LD A,(HL) ; 04FA: 28 0C JR Z,$508 ; 04FC: 2C INC L ; 04FD: E6 0F AND $0F ; 04FF: 28 E4 JR Z,$4E5 ; 0501: 2C INC L ; 0502: 34 INC (HL) ; 0503: C3 ED 04 JP $04ED ; 0506: AF XOR A ; 0507: C9 RET ; 0508: 3D DEC A ; 0509: C9 RET ;
Command 06
Command06: ; Initialization Routine Vector 06 (UFO shot) 050A: AF XOR A ; 050B: CD C8 01 CALL SetFilterCaps ; 050E: 21 50 00 LD HL,$0050 ; 0511: CD AA 01 CALL $01AA ; Write tone 0514: 21 51 30 LD HL,$3051 ; 0517: 36 40 LD (HL),$40 ; 0519: 2C INC L ; 051A: 0E 05 LD C,$05 ; 051C: 71 LD (HL),C ; 051D: CD 99 01 CALL $0199 ; Set volume 0520: 2C INC L ; 0521: 36 17 LD (HL),$17 ; 0523: 2C INC L ; 0524: 36 50 LD (HL),$50 ; 0526: AF XOR A ; 0527: C9 RET ; ; Continue Sound Routine Vector 06 (UFO shot) 0528: 21 51 30 LD HL,$3051 ; 052B: 35 DEC (HL) ; 052C: 28 E9 JR Z,$517 ; 052E: 7E LD A,(HL) ; 052F: 2C INC L ; 0530: E6 0F AND $0F ; 0532: 20 05 JR NZ,$539 ; 0534: 34 INC (HL) ; 0535: 4E LD C,(HL) ; 0536: CD 99 01 CALL $0199 ; Set volume 0539: 2C INC L ; 053A: 7E LD A,(HL) ; 053B: C6 29 ADD A,$29 ; 053D: 77 LD (HL),A ; 053E: 2C INC L ; 053F: AE XOR (HL) ; 0540: E6 3F AND $3F ; 0542: C6 50 ADD A,$50 ; 0544: 77 LD (HL),A ; 0545: 6F LD L,A ; 0546: 26 00 LD H,$00 ; 0548: CD AA 01 CALL $01AA ; Write tone 054B: AF XOR A ; 054C: C9 RET ;
Command 07
Command07: ; Initialization Routine Vector 07 (User Fire) 054D: AF XOR A ; 054E: CD C8 01 CALL SetFilterCaps ; 0551: 21 56 30 LD HL,$3056 ; 0554: 36 08 LD (HL),$08 ; 0556: 2D DEC L ; 0557: 36 2C LD (HL),$2C ; 0559: 2C INC L ; 055A: 35 DEC (HL) ; 055B: 28 29 JR Z,$586 ; 055D: 4E LD C,(HL) ; 055E: CD 99 01 CALL $0199 ; Set volume 0561: 21 00 00 LD HL,$0000 ; 0564: 22 57 30 LD (?command07?+2),HL ; 0567: CD AA 01 CALL $01AA ; Write tone 056A: AF XOR A ; 056B: C9 RET ; ; Continue Sound Routine Vector 07 (User Fire) 056C: 21 55 30 LD HL,$3055 ; 056F: 35 DEC (HL) ; 0570: 7E LD A,(HL) ; 0571: 28 E4 JR Z,$557 ; 0573: FE 16 CP $16 ; 0575: 28 EA JR Z,$561 ; 0577: 2A 57 30 LD HL,(?command07?+2) ; 057A: 01 10 00 LD BC,$0010 ; 057D: 09 ADD HL,BC ; 057E: 22 57 30 LD (?command07?+2),HL ; 0581: CD AA 01 CALL $01AA ; Write tone 0584: AF XOR A ; 0585: C9 RET ; 0586: 3D DEC A ; 0587: C9 RET ;
Command 08
Command08: ; Initialization Routine Vector 08 (Enemy Explosion Component - thud) 0588: 3E 01 LD A,$01 ; 058A: CD C8 01 CALL SetFilterCaps ; 058D: 21 5C 30 LD HL,$305C ; 0590: 36 0C LD (HL),$0C ; 0592: 4E LD C,(HL) ; 0593: CD 99 01 CALL $0199 ; Set volume 0596: 2D DEC L ; 0597: 36 00 LD (HL),$00 ; 0599: 21 80 00 LD HL,$0080 ; 059C: 22 59 30 LD (?command08?),HL ; 059F: CD AA 01 CALL $01AA ; Write tone 05A2: AF XOR A ; 05A3: C9 RET ; ; Continue Sound Routine Vector 08 (Enemy Explosion Component - thud) 05A4: 21 5B 30 LD HL,$305B ; 05A7: 34 INC (HL) ; 05A8: 7E LD A,(HL) ; 05A9: FE 59 CP $59 ; 05AB: 28 0F JR Z,$5BC ; 05AD: 4F LD C,A ; 05AE: 06 00 LD B,$00 ; 05B0: 2A 59 30 LD HL,(?command08?) ; 05B3: 09 ADD HL,BC ; 05B4: 22 59 30 LD (?command08?),HL ; 05B7: CD AA 01 CALL $01AA ; Write tone 05BA: AF XOR A ; 05BB: C9 RET ; 05BC: 2C INC L ; 05BD: 7E LD A,(HL) ; 05BE: D6 04 SUB $04 ; 05C0: 28 04 JR Z,$5C6 ; 05C2: 77 LD (HL),A ; 05C3: C3 92 05 JP $0592 ; 05C6: 3D DEC A ; 05C7: C9 RET ;
Command 09
Command09: ; Initialization Routine Vector 09 (Enemy Explosion Component white-noise) 05C8: 3E 01 LD A,$01 ; 05CA: CD C8 01 CALL SetFilterCaps ; 05CD: 21 5D 30 LD HL,$305D ; 05D0: 36 00 LD (HL),$00 ; 05D2: 2C INC L ; 05D3: 36 E0 LD (HL),$E0 ; 05D5: 2C INC L ; 05D6: 0E 0D LD C,$0D ; 05D8: 71 LD (HL),C ; 05D9: CD 99 01 CALL $0199 ; Set volume 05DC: 2C INC L ; 05DD: 36 93 LD (HL),$93 ; 05DF: 2C INC L ; 05E0: 36 D5 LD (HL),$D5 ; 05E2: 21 C0 00 LD HL,$00C0 ; 05E5: CD AA 01 CALL $01AA ; Write tone 05E8: AF XOR A ; 05E9: C9 RET ; ; Continue Sound Routine Vector 09 (Enemy Explosion Component white-noise) 05EA: 21 5D 30 LD HL,$305D ; 05ED: 35 DEC (HL) ; 05EE: CB 46 BIT 0,(HL) ; 05F0: 20 25 JR NZ,$617 ; 05F2: 2C INC L ; 05F3: 35 DEC (HL) ; 05F4: 7E LD A,(HL) ; 05F5: 28 22 JR Z,$619 ; 05F7: FE D0 CP $D0 ; 05F9: 28 DA JR Z,$5D5 ; 05FB: 2C INC L ; 05FC: E6 0F AND $0F ; 05FE: 20 05 JR NZ,$605 ; 0600: 35 DEC (HL) ; 0601: 4E LD C,(HL) ; 0602: CD 99 01 CALL $0199 ; Set volume 0605: 2C INC L ; 0606: 7E LD A,(HL) ; 0607: C6 53 ADD A,$53 ; 0609: 77 LD (HL),A ; 060A: 2C INC L ; 060B: AE XOR (HL) ; 060C: 77 LD (HL),A ; 060D: 6F LD L,A ; 060E: FE E0 CP $E0 ; 0610: 38 01 JR C,$613 ; 0612: AF XOR A ; 0613: 67 LD H,A ; 0614: CD AA 01 CALL $01AA ; Write tone 0617: AF XOR A ; 0618: C9 RET ; 0619: 3D DEC A ; 061A: C9 RET ;
Command 0A
Command0A: ; Initialization Routine Vector 0A (Traker or Bomb Explosion) 061B: AF XOR A ; 061C: CD C8 01 CALL SetFilterCaps ; 061F: 21 62 30 LD HL,$3062 ; 0622: 36 00 LD (HL),$00 ; 0624: 2C INC L ; 0625: 36 C0 LD (HL),$C0 ; 0627: 2C INC L ; 0628: 36 0D LD (HL),$0D ; 062A: 35 DEC (HL) ; 062B: 4E LD C,(HL) ; 062C: CD 99 01 CALL $0199 ; Set volume 062F: 21 20 00 LD HL,$0020 ; 0632: 22 65 30 LD (?command0A?+3),HL ; 0635: CD AA 01 CALL $01AA ; Write tone 0638: AF XOR A ; 0639: C9 RET ; ; Continue Sound Routine Vector 0A (Traker or Bomb Explosion) 063A: 21 62 30 LD HL,$3062 ; 063D: 35 DEC (HL) ; 063E: 7E LD A,(HL) ; 063F: E6 01 AND $01 ; 0641: 20 17 JR NZ,$65A ; 0643: 2C INC L ; 0644: 35 DEC (HL) ; 0645: 7E LD A,(HL) ; 0646: 28 14 JR Z,$65C ; 0648: 2C INC L ; 0649: E6 0F AND $0F ; 064B: 28 DD JR Z,$62A ; 064D: 2A 65 30 LD HL,(?command0A?+3) ; 0650: 01 40 00 LD BC,$0040 ; 0653: 09 ADD HL,BC ; 0654: 22 65 30 LD (?command0A?+3),HL ; 0657: CD AA 01 CALL $01AA ; Write tone 065A: AF XOR A ; 065B: C9 RET ; 065C: 3D DEC A ; 065D: C9 RET ;
Command 0B
Command0B: ; Initialization Routine Vector 0B (Squad appears) 065E: AF XOR A ; No filter ... 065F: CD C8 01 CALL SetFilterCaps ; ... caps on channel 0662: 0E 0C LD C,$0C ; Set ... 0664: CD 99 01 CALL $0199 ; ... volume 0667: 21 67 30 LD HL,$3067 ; Set ... 066A: 36 B8 LD (HL),$B8 ; ... 3067 = B8 066C: 2C INC L ; Set ... 066D: 36 1F LD (HL),$1F ; ... 3068 = 1F 066F: 21 1F 00 LD HL,$001F ; Initial tone 0672: CD AA 01 CALL $01AA ; Write tone 0675: AF XOR A ; Continue 0676: C9 RET ; ; Continue Sound Routine Vector 0B (Squad appears) 0677: 21 67 30 LD HL,$3067 ; (3067) = (3067) - 1 067A: 35 DEC (HL) ; ... 067B: 7E LD A,(HL) ; End when MSB ... 067C: 28 15 JR Z,$693 ; ... is 0 067E: FE 60 CP $60 ; 0680: 28 EA JR Z,$66C ; 0682: E6 03 AND $03 ; 0684: 20 0B JR NZ,$691 ; 0686: 2C INC L ; 0687: 7E LD A,(HL) ; 0688: C6 20 ADD A,$20 ; 068A: 77 LD (HL),A ; 068B: 6F LD L,A ; 068C: 26 00 LD H,$00 ; 068E: CD AA 01 CALL $01AA ; Write tone 0691: AF XOR A ; 0692: C9 RET ; 0693: 3D DEC A ; 0694: C9 RET ;
Command 0C
Command0C: ; Initialization Routine Vector 0C (1st boss - blimp) 0695: 3E 01 LD A,$01 ; 0697: CD C8 01 CALL SetFilterCaps ; 069A: 21 C0 00 LD HL,$00C0 ; 069D: CD AA 01 CALL $01AA ; Write tone 06A0: 0E 0F LD C,$0F ; 06A2: CD 99 01 CALL $0199 ; Set volume 06A5: AF XOR A ; 06A6: 21 69 30 LD HL,$3069 ; 06A9: 77 LD (HL),A ; 06AA: 2C INC L ; 06AB: 36 53 LD (HL),$53 ; 06AD: 2C INC L ; 06AE: 36 09 LD (HL),$09 ; 06B0: 2C INC L ; 06B1: 36 37 LD (HL),$37 ; 06B3: C9 RET ; ; Continue Sound Routine Vector 0C (1st boss - blimp) 06B4: 21 69 30 LD HL,$3069 ; 06B7: 35 DEC (HL) ; 06B8: 56 LD D,(HL) ; 06B9: 2C INC L ; 06BA: 7E LD A,(HL) ; 06BB: C6 D5 ADD A,$D5 ; 06BD: 77 LD (HL),A ; 06BE: 2C INC L ; 06BF: CB 42 BIT 0,D ; 06C1: 20 09 JR NZ,$6CC ; 06C3: AE XOR (HL) ; 06C4: 77 LD (HL),A ; 06C5: E6 EF AND $EF ; 06C7: 4F LD C,A ; 06C8: CD 99 01 CALL $0199 ; Set volume 06CB: 79 LD A,C ; 06CC: 2C INC L ; 06CD: AE XOR (HL) ; 06CE: 77 LD (HL),A ; 06CF: F6 80 OR $80 ; 06D1: 6F LD L,A ; 06D2: 26 00 LD H,$00 ; 06D4: CD AA 01 CALL $01AA ; Write tone 06D7: AF XOR A ; 06D8: C9 RET ;
Command 0D
Command0D: ; Initialization Routine Vector 0D (2nd boss - jet) 06D9: 3E 01 LD A,$01 ; 06DB: CD C8 01 CALL SetFilterCaps ; 06DE: 21 6D 30 LD HL,$306D ; 06E1: 36 28 LD (HL),$28 ; 06E3: 2C INC L ; 06E4: 36 05 LD (HL),$05 ; 06E6: 2C INC L ; 06E7: 36 30 LD (HL),$30 ; 06E9: 21 00 06 LD HL,$0600 ; 06EC: CD AA 01 CALL $01AA ; Write tone 06EF: 0E 08 LD C,$08 ; 06F1: CD 99 01 CALL $0199 ; Set volume 06F4: AF XOR A ; 06F5: C9 RET ; ; Continue Sound Routine Vector 0D (2nd boss - jet) 06F6: 21 6D 30 LD HL,$306D ; 06F9: 35 DEC (HL) ; 06FA: 28 E5 JR Z,$6E1 ; 06FC: 7E LD A,(HL) ; 06FD: E6 07 AND $07 ; 06FF: C6 08 ADD A,$08 ; 0701: 4F LD C,A ; 0702: CD 99 01 CALL $0199 ; Set volume 0705: 2C INC L ; 0706: 7E LD A,(HL) ; 0707: C6 B9 ADD A,$B9 ; 0709: 77 LD (HL),A ; 070A: 2C INC L ; 070B: AE XOR (HL) ; 070C: 77 LD (HL),A ; 070D: 6F LD L,A ; 070E: 26 06 LD H,$06 ; 0710: CD AA 01 CALL $01AA ; Write tone 0713: AF XOR A ; 0714: C9 RET ;
Command 0E
Command0E: ; Initialization Routine Vector 0E (3rd boss - helicopter) 0715: 3E 01 LD A,$01 ; 0717: CD C8 01 CALL SetFilterCaps ; 071A: 21 00 01 LD HL,$0100 ; 071D: CD AA 01 CALL $01AA ; Write tone 0720: 21 70 30 LD HL,$3070 ; 0723: 36 00 LD (HL),$00 ; 0725: 2C INC L ; 0726: 0E 0F LD C,$0F ; 0728: 71 LD (HL),C ; 0729: CD 99 01 CALL $0199 ; Set volume 072C: AF XOR A ; 072D: 2C INC L ; 072E: 77 LD (HL),A ; 072F: 2C INC L ; 0730: 77 LD (HL),A ; 0731: C9 RET ; ; Continue Sound Routine Vector 0E (3rd boss - helicopter) 0732: 21 70 30 LD HL,$3070 ; 0735: 35 DEC (HL) ; 0736: 7E LD A,(HL) ; 0737: CB 47 BIT 0,A ; 0739: 23 INC HL ; 073A: 20 0B JR NZ,$747 ; 073C: 35 DEC (HL) ; 073D: E6 10 AND $10 ; 073F: 20 02 JR NZ,$743 ; 0741: 34 INC (HL) ; 0742: 34 INC (HL) ; 0743: 4E LD C,(HL) ; 0744: CD 99 01 CALL $0199 ; Set volume 0747: 2C INC L ; 0748: 7E LD A,(HL) ; 0749: C6 D3 ADD A,$D3 ; 074B: 77 LD (HL),A ; 074C: 2C INC L ; 074D: AE XOR (HL) ; 074E: 77 LD (HL),A ; 074F: E6 7F AND $7F ; 0751: C6 A8 ADD A,$A8 ; 0753: 6F LD L,A ; 0754: E6 07 AND $07 ; 0756: 67 LD H,A ; 0757: CD AA 01 CALL $01AA ; Write tone 075A: AF XOR A ; 075B: C9 RET ;
Command 0F
Command0F: ; Initialization Routine Vector 0F (4th boss - super jet) 075C: 3E 01 LD A,$01 ; 075E: CD C8 01 CALL SetFilterCaps ; 0761: 21 00 01 LD HL,$0100 ; 0764: CD AA 01 CALL $01AA ; Write tone 0767: 0E 0C LD C,$0C ; 0769: CD 99 01 CALL $0199 ; Set volume 076C: AF XOR A ; 076D: 21 74 30 LD HL,$3074 ; 0770: 77 LD (HL),A ; 0771: 2C INC L ; 0772: 77 LD (HL),A ; 0773: C9 RET ; ; Continue Sound Routine Vector 0F (4th boss - super jet) 0774: 21 74 30 LD HL,$3074 ; 0777: 7E LD A,(HL) ; 0778: C6 97 ADD A,$97 ; 077A: 77 LD (HL),A ; 077B: 2C INC L ; 077C: AE XOR (HL) ; 077D: 77 LD (HL),A ; 077E: E6 7F AND $7F ; 0780: C6 C0 ADD A,$C0 ; 0782: 6F LD L,A ; 0783: 26 01 LD H,$01 ; 0785: CD AA 01 CALL $01AA ; Write tone 0788: AF XOR A ; 0789: C9 RET ;
Command 10
Command10: ; Initialization Routine Vector 10 (5th boss - mother ship) 078A: 3E 01 LD A,$01 ; 078C: CD C8 01 CALL SetFilterCaps ; 078F: 0E 0A LD C,$0A ; 0791: CD 99 01 CALL $0199 ; Set volume 0794: 21 76 30 LD HL,$3076 ; 0797: 36 30 LD (HL),$30 ; 0799: 2C INC L ; 079A: 36 02 LD (HL),$02 ; 079C: 2C INC L ; 079D: 3E E0 LD A,$E0 ; 079F: 77 LD (HL),A ; 07A0: 2C INC L ; 07A1: 77 LD (HL),A ; 07A2: 6F LD L,A ; 07A3: 26 00 LD H,$00 ; 07A5: CD AA 01 CALL $01AA ; Write tone 07A8: AF XOR A ; 07A9: C9 RET ; ; Continue Sound Routine Vector 10 (5th boss - mother ship) 07AA: 21 76 30 LD HL,$3076 ; 07AD: 35 DEC (HL) ; 07AE: 7E LD A,(HL) ; 07AF: 28 E6 JR Z,$797 ; 07B1: 2C INC L ; 07B2: E6 0F AND $0F ; 07B4: 28 07 JR Z,$7BD ; 07B6: 7E LD A,(HL) ; 07B7: 2C INC L ; 07B8: 2C INC L ; 07B9: 86 ADD A,(HL) ; 07BA: C3 A1 07 JP $07A1 ; 07BD: 34 INC (HL) ; 07BE: 34 INC (HL) ; 07BF: 2C INC L ; 07C0: 7E LD A,(HL) ; 07C1: D6 20 SUB $20 ; 07C3: C3 9F 07 JP $079F ;
Command 11
Command11: ; Initialization Routine Vector 11 (User Explosion Component) 07C6: 3E 01 LD A,$01 ; 07C8: CD C8 01 CALL SetFilterCaps ; 07CB: 21 00 00 LD HL,$0000 ; 07CE: CD AA 01 CALL $01AA ; Write tone 07D1: 21 7A 30 LD HL,$307A ; 07D4: 36 00 LD (HL),$00 ; 07D6: 2C INC L ; 07D7: 0E 0F LD C,$0F ; 07D9: 71 LD (HL),C ; 07DA: CD 99 01 CALL $0199 ; Set volume 07DD: 2C INC L ; 07DE: 36 45 LD (HL),$45 ; 07E0: 2C INC L ; 07E1: 36 99 LD (HL),$99 ; 07E3: AF XOR A ; 07E4: C9 RET ; ; Continue Sound Routine Vector 11 (User Explosion Component) 07E5: 21 7A 30 LD HL,$307A ; 07E8: 35 DEC (HL) ; 07E9: 7E LD A,(HL) ; 07EA: CB 47 BIT 0,A ; 07EC: 20 19 JR NZ,$807 ; 07EE: 2C INC L ; 07EF: E6 3F AND $3F ; 07F1: 20 07 JR NZ,$7FA ; 07F3: 35 DEC (HL) ; 07F4: 28 13 JR Z,$809 ; 07F6: 4E LD C,(HL) ; 07F7: CD 99 01 CALL $0199 ; Set volume 07FA: 2C INC L ; 07FB: 7E LD A,(HL) ; 07FC: C6 D3 ADD A,$D3 ; 07FE: 77 LD (HL),A ; 07FF: 2C INC L ; 0800: AE XOR (HL) ; 0801: 77 LD (HL),A ; 0802: 6F LD L,A ; 0803: 67 LD H,A ; 0804: CD AA 01 CALL $01AA ; Write tone 0807: AF XOR A ; 0808: C9 RET ; 0809: 3D DEC A ; 080A: C9 RET ;
Command 12
Command12: ; Initialization Routine Vector 12 (User Explosion Component) 080B: 3E 01 LD A,$01 ; 080D: CD C8 01 CALL SetFilterCaps ; 0810: 21 00 00 LD HL,$0000 ; 0813: 22 81 30 LD (?command12?+3),HL ; 0816: CD AA 01 CALL $01AA ; Write tone 0819: 21 7E 30 LD HL,$307E ; 081C: 36 00 LD (HL),$00 ; 081E: 2C INC L ; 081F: 0E 0F LD C,$0F ; 0821: 71 LD (HL),C ; 0822: CD 99 01 CALL $0199 ; Set volume 0825: 2C INC L ; 0826: AF XOR A ; 0827: 77 LD (HL),A ; 0828: C9 RET ; ; Continue Sound Routine Vector 12 (User Explosion Component) 0829: 21 7E 30 LD HL,$307E ; 082C: 35 DEC (HL) ; 082D: 7E LD A,(HL) ; 082E: 57 LD D,A ; 082F: 2C INC L ; 0830: E6 1F AND $1F ; 0832: 20 07 JR NZ,$83B ; 0834: 35 DEC (HL) ; 0835: 28 1E JR Z,$855 ; 0837: 4E LD C,(HL) ; 0838: CD 99 01 CALL $0199 ; Set volume 083B: 2C INC L ; 083C: 7E LD A,(HL) ; 083D: C6 C5 ADD A,$C5 ; 083F: 77 LD (HL),A ; 0840: 2A 81 30 LD HL,(?command12?+3) ; 0843: AA XOR D ; 0844: AD XOR L ; 0845: 6F LD L,A ; 0846: 67 LD H,A ; 0847: FE 80 CP $80 ; 0849: 30 02 JR NC,$84D ; 084B: 26 01 LD H,$01 ; 084D: 22 81 30 LD (?command12?+3),HL ; 0850: CD AA 01 CALL $01AA ; Write tone 0853: AF XOR A ; 0854: C9 RET ; 0855: 3D DEC A ; 0856: C9 RET ;
Command 13
Command13: ; Initialization Routine Vector 13 (User Explosion Component) 0857: 3E 02 LD A,$02 ; 0859: CD C8 01 CALL SetFilterCaps ; 085C: 21 00 00 LD HL,$0000 ; 085F: CD AA 01 CALL $01AA ; Write tone 0862: 21 83 30 LD HL,$3083 ; 0865: 0E 0F LD C,$0F ; 0867: 71 LD (HL),C ; 0868: CD 99 01 CALL $0199 ; Set volume 086B: 2C INC L ; 086C: 36 30 LD (HL),$30 ; 086E: 2C INC L ; 086F: 36 95 LD (HL),$95 ; 0871: 2C INC L ; 0872: 36 3D LD (HL),$3D ; 0874: 21 70 00 LD HL,$0070 ; 0877: 22 87 30 LD (?command13?+4),HL ; 087A: 22 89 30 LD (?command13?+6),HL ; 087D: AF XOR A ; 087E: C9 RET ; ; Continue Sound Routine Vector 13 (User Explosion Component) 087F: 21 84 30 LD HL,$3084 ; 0882: 35 DEC (HL) ; 0883: 7E LD A,(HL) ; 0884: 28 28 JR Z,$8AE ; 0886: FE 10 CP $10 ; 0888: 38 10 JR C,$89A ; 088A: 2C INC L ; 088B: 7E LD A,(HL) ; 088C: C6 C9 ADD A,$C9 ; 088E: 77 LD (HL),A ; 088F: 2C INC L ; 0890: AE XOR (HL) ; 0891: 77 LD (HL),A ; 0892: 6F LD L,A ; 0893: 26 01 LD H,$01 ; 0895: CD AA 01 CALL $01AA ; Write tone 0898: AF XOR A ; 0899: C9 RET ; 089A: D6 10 SUB $10 ; 089C: ED 44 NEG ; 089E: 87 ADD A,A ; 089F: 4F LD C,A ; 08A0: 06 00 LD B,$00 ; 08A2: 2A 89 30 LD HL,(?command13?+6) ; 08A5: 09 ADD HL,BC ; 08A6: 22 89 30 LD (?command13?+6),HL ; 08A9: CD AA 01 CALL $01AA ; Write tone 08AC: AF XOR A ; 08AD: C9 RET ; 08AE: 2D DEC L ; 08AF: 35 DEC (HL) ; 08B0: 28 1C JR Z,$8CE ; 08B2: 4E LD C,(HL) ; 08B3: CD 99 01 CALL $0199 ; Set volume 08B6: 2C INC L ; 08B7: 3A 85 30 LD A,(?command13?+2) ; 08BA: E6 3F AND $3F ; 08BC: C6 30 ADD A,$30 ; 08BE: 77 LD (HL),A ; 08BF: 2A 87 30 LD HL,(?command13?+4) ; 08C2: 01 60 00 LD BC,$0060 ; 08C5: 09 ADD HL,BC ; 08C6: 22 87 30 LD (?command13?+4),HL ; 08C9: 22 89 30 LD (?command13?+6),HL ; 08CC: AF XOR A ; 08CD: C9 RET ; 08CE: 3D DEC A ; 08CF: C9 RET ;
Command 14
Command14: ; Initialization Routine Vector 14 (User Explosion Component) 08D0: 3E 02 LD A,$02 ; 08D2: CD C8 01 CALL SetFilterCaps ; 08D5: 21 00 00 LD HL,$0000 ; 08D8: CD AA 01 CALL $01AA ; Write tone 08DB: 21 8B 30 LD HL,$308B ; 08DE: 0E 0F LD C,$0F ; 08E0: 71 LD (HL),C ; 08E1: CD 99 01 CALL $0199 ; Set volume 08E4: 2C INC L ; 08E5: 36 30 LD (HL),$30 ; 08E7: 2C INC L ; 08E8: 36 95 LD (HL),$95 ; 08EA: 2C INC L ; 08EB: 36 3D LD (HL),$3D ; 08ED: 21 38 00 LD HL,$0038 ; 08F0: 22 8F 30 LD (?command14?+4),HL ; 08F3: 22 91 30 LD (?command14?+6),HL ; 08F6: AF XOR A ; 08F7: C9 RET ; ; Continue Sound Routine Vector 14 (User Explosion Component) 08F8: 21 8C 30 LD HL,$308C ; 08FB: 35 DEC (HL) ; 08FC: 7E LD A,(HL) ; 08FD: 28 23 JR Z,$922 ; 08FF: FE 10 CP $10 ; 0901: 38 10 JR C,$913 ; 0903: 2C INC L ; 0904: 7E LD A,(HL) ; 0905: C6 D3 ADD A,$D3 ; 0907: 77 LD (HL),A ; 0908: 2C INC L ; 0909: AE XOR (HL) ; 090A: 77 LD (HL),A ; 090B: 6F LD L,A ; 090C: 26 01 LD H,$01 ; 090E: CD AA 01 CALL $01AA ; Write tone 0911: AF XOR A ; 0912: C9 RET ; 0913: 2A 91 30 LD HL,(?command14?+6) ; 0916: 01 30 00 LD BC,$0030 ; 0919: 09 ADD HL,BC ; 091A: 22 91 30 LD (?command14?+6),HL ; 091D: CD AA 01 CALL $01AA ; Write tone 0920: AF XOR A ; 0921: C9 RET ; 0922: 2D DEC L ; 0923: 35 DEC (HL) ; 0924: 28 1C JR Z,$942 ; 0926: 4E LD C,(HL) ; 0927: CD 99 01 CALL $0199 ; Set volume 092A: 2C INC L ; 092B: 3A 8D 30 LD A,(?command14?+2) ; 092E: E6 3F AND $3F ; 0930: C6 30 ADD A,$30 ; 0932: 77 LD (HL),A ; 0933: 2A 8F 30 LD HL,(?command14?+4) ; 0936: 01 06 00 LD BC,$0006 ; 0939: 09 ADD HL,BC ; 093A: 22 8F 30 LD (?command14?+4),HL ; 093D: 22 91 30 LD (?command14?+6),HL ; 0940: AF XOR A ; 0941: C9 RET ; 0942: 3D DEC A ; 0943: C9 RET ;
Command 15
Command15: ; Initialization Routine Vector 15 (User Explosion Component) 0944: 3E 01 LD A,$01 ; 0946: CD C8 01 CALL SetFilterCaps ; 0949: 21 93 30 LD HL,$3093 ; 094C: 36 00 LD (HL),$00 ; 094E: 2C INC L ; 094F: 36 D0 LD (HL),$D0 ; 0951: 2C INC L ; 0952: 0E 0D LD C,$0D ; 0954: 71 LD (HL),C ; 0955: CD 99 01 CALL $0199 ; Set volume 0958: 2C INC L ; 0959: 36 93 LD (HL),$93 ; 095B: 2C INC L ; 095C: 36 D5 LD (HL),$D5 ; 095E: 21 C0 00 LD HL,$00C0 ; 0961: CD AA 01 CALL $01AA ; Write tone 0964: AF XOR A ; 0965: C9 RET ; ; Continue Sound Routine Vector 15 (User Explosion Component) 0966: 21 93 30 LD HL,$3093 ; 0969: 35 DEC (HL) ; 096A: 7E LD A,(HL) ; 096B: E6 03 AND $03 ; 096D: 20 29 JR NZ,$998 ; 096F: 2C INC L ; 0970: 35 DEC (HL) ; 0971: 28 27 JR Z,$99A ; 0973: 7E LD A,(HL) ; 0974: FE 98 CP $98 ; 0976: 28 D9 JR Z,$951 ; 0978: FE 80 CP $80 ; 097A: 28 D5 JR Z,$951 ; 097C: 2C INC L ; 097D: E6 0F AND $0F ; 097F: 20 05 JR NZ,$986 ; 0981: 35 DEC (HL) ; 0982: 4E LD C,(HL) ; 0983: CD 99 01 CALL $0199 ; Set volume 0986: 2C INC L ; 0987: 7E LD A,(HL) ; 0988: C6 53 ADD A,$53 ; 098A: 77 LD (HL),A ; 098B: 2C INC L ; 098C: AE XOR (HL) ; 098D: 77 LD (HL),A ; 098E: 6F LD L,A ; 098F: FE E0 CP $E0 ; 0991: 38 01 JR C,$994 ; 0993: AF XOR A ; 0994: 67 LD H,A ; 0995: CD AA 01 CALL $01AA ; Write tone 0998: AF XOR A ; 0999: C9 RET ; 099A: 3D DEC A ; 099B: C9 RET ;
Command 16
Command16: ; Initialization Routine Vector 16 (Pickup Parachute) 099C: AF XOR A ; 099D: CD C8 01 CALL SetFilterCaps ; 09A0: 0E 09 LD C,$09 ; 09A2: CD 99 01 CALL $0199 ; Set volume 09A5: 21 99 30 LD HL,$3099 ; 09A8: 3E F6 LD A,$F6 ; 09AA: D6 06 SUB $06 ; 09AC: 77 LD (HL),A ; 09AD: D6 7E SUB $7E ; 09AF: 28 1E JR Z,$9CF ; 09B1: 2D DEC L ; 09B2: 36 30 LD (HL),$30 ; 09B4: 21 30 00 LD HL,$0030 ; 09B7: CD AA 01 CALL $01AA ; Write tone 09BA: AF XOR A ; 09BB: C9 RET ; ; Continue Sound Routine Vector 16 (Pickup Parachute) 09BC: 21 98 30 LD HL,$3098 ; 09BF: 7E LD A,(HL) ; 09C0: C6 06 ADD A,$06 ; 09C2: 77 LD (HL),A ; 09C3: 2C INC L ; 09C4: BE CP (HL) ; 09C5: 28 E3 JR Z,$9AA ; 09C7: 6F LD L,A ; 09C8: 26 00 LD H,$00 ; 09CA: CD AA 01 CALL $01AA ; Write tone 09CD: AF XOR A ; 09CE: C9 RET ; 09CF: 3D DEC A ; 09D0: C9 RET ;
Command 17
Command17: ; Initialization Routine Vector 17 (Free Man) 09D1: 3E 01 LD A,$01 ; 09D3: CD C8 01 CALL SetFilterCaps ; 09D6: 0E 0F LD C,$0F ; 09D8: CD 99 01 CALL $0199 ; Set volume 09DB: 21 9A 30 LD HL,$309A ; 09DE: 36 1D LD (HL),$1D ; 09E0: 2C INC L ; 09E1: 2D DEC L ; 09E2: 35 DEC (HL) ; 09E3: 7E LD A,(HL) ; 09E4: 28 1A JR Z,$A00 ; 09E6: 2C INC L ; 09E7: 77 LD (HL),A ; 09E8: 87 ADD A,A ; 09E9: 6F LD L,A ; 09EA: 26 00 LD H,$00 ; 09EC: CD AA 01 CALL $01AA ; Write tone 09EF: AF XOR A ; 09F0: C9 RET ; ; Continue Sound Routine Vector 17 (Free Man) 09F1: 21 9B 30 LD HL,$309B ; 09F4: 35 DEC (HL) ; 09F5: 28 EA JR Z,$9E1 ; 09F7: 6E LD L,(HL) ; 09F8: 26 00 LD H,$00 ; 09FA: 29 ADD HL,HL ; 09FB: CD AA 01 CALL $01AA ; Write tone 09FE: AF XOR A ; 09FF: C9 RET ; 0A00: 3D DEC A ; 0A01: C9 RET ;
Command 18
Command18: ; Initialization Routine Vector 18 (Time Jump 1) 0A02: AF XOR A ; 0A03: CD C8 01 CALL SetFilterCaps ; 0A06: 0E 0A LD C,$0A ; 0A08: CD 99 01 CALL $0199 ; Set volume 0A0B: 3E 80 LD A,$80 ; 0A0D: 32 9E 30 LD (?command18?+2),A ; 0A10: 21 9C 30 LD HL,$309C ; 0A13: 36 00 LD (HL),$00 ; 0A15: 2C INC L ; 0A16: 36 C0 LD (HL),$C0 ; 0A18: 21 C0 00 LD HL,$00C0 ; 0A1B: CD AA 01 CALL $01AA ; Write tone 0A1E: AF XOR A ; 0A1F: C9 RET ; ; Continue Sound Routine Vector 18 (Time Jump 1) 0A20: 21 9C 30 LD HL,$309C ; 0A23: 35 DEC (HL) ; 0A24: CB 46 BIT 0,(HL) ; 0A26: 23 INC HL ; 0A27: 7E LD A,(HL) ; 0A28: 20 15 JR NZ,$A3F ; 0A2A: 35 DEC (HL) ; 0A2B: 7E LD A,(HL) ; 0A2C: FE 20 CP $20 ; 0A2E: 28 18 JR Z,$A48 ; 0A30: 2C INC L ; 0A31: BE CP (HL) ; 0A32: 3A 9D 30 LD A,(?command18?+1) ; 0A35: 20 09 JR NZ,$A40 ; 0A37: 7E LD A,(HL) ; 0A38: C6 05 ADD A,$05 ; 0A3A: 77 LD (HL),A ; 0A3B: 2D DEC L ; 0A3C: C3 16 0A JP $0A16 ; 0A3F: 1F RRA ; 0A40: 6F LD L,A ; 0A41: 26 00 LD H,$00 ; 0A43: CD AA 01 CALL $01AA ; Write tone 0A46: AF XOR A ; 0A47: C9 RET ; 0A48: 3E FF LD A,$FF ; 0A4A: C9 RET ;
Command 19
Command19: ; Initialization Routine Vector 19 (Time Jump 2) 0A4B: AF XOR A ; 0A4C: CD C8 01 CALL SetFilterCaps ; 0A4F: 21 C0 00 LD HL,$00C0 ; 0A52: CD AA 01 CALL $01AA ; Write tone 0A55: 0E 0F LD C,$0F ; 0A57: CD 99 01 CALL $0199 ; Set volume 0A5A: 21 9F 30 LD HL,$309F ; 0A5D: 36 00 LD (HL),$00 ; 0A5F: 2C INC L ; 0A60: 36 10 LD (HL),$10 ; 0A62: 2C INC L ; 0A63: 36 03 LD (HL),$03 ; 0A65: 2C INC L ; 0A66: 36 05 LD (HL),$05 ; 0A68: AF XOR A ; 0A69: C9 RET ; ; Continue Sound Routine Vector 19 (Time Jump 2) 0A6A: 21 9F 30 LD HL,$309F ; 0A6D: 35 DEC (HL) ; 0A6E: 7E LD A,(HL) ; 0A6F: 2C INC L ; 0A70: E6 3F AND $3F ; 0A72: 20 03 JR NZ,$A77 ; 0A74: 35 DEC (HL) ; 0A75: 28 19 JR Z,$A90 ; 0A77: E6 03 AND $03 ; 0A79: 20 13 JR NZ,$A8E ; 0A7B: 56 LD D,(HL) ; 0A7C: 2C INC L ; 0A7D: 7E LD A,(HL) ; 0A7E: C6 05 ADD A,$05 ; 0A80: 77 LD (HL),A ; 0A81: 2C INC L ; 0A82: AE XOR (HL) ; 0A83: E6 0F AND $0F ; 0A85: 77 LD (HL),A ; 0A86: BA CP D ; 0A87: 38 01 JR C,$A8A ; 0A89: AF XOR A ; 0A8A: 4F LD C,A ; 0A8B: CD 99 01 CALL $0199 ; Set volume 0A8E: AF XOR A ; 0A8F: C9 RET ; 0A90: 3D DEC A ; 0A91: C9 RET ;
Command Table
CommandTable:
; Initialize sound routines
0A92: 97 01 ; 0 Stop all sounds
0A94: E7 03 ; 1 0 Coin Drop
0A96: 32 04 ; 2 0 Plane Fire
0A98: 62 04 ; 3 0 1910 Bomb
0A9A: 9A 04 ; 4 1 Missile launch
0A9C: D9 04 ; 5 0 Missile (continuous)
0A9E: 0A 05 ; 6 0 UFO shot
0AA0: 4D 05 ; 7 0 User Fire
0AA2: 88 05 ; 8 1 Enemy Explosion Component (thud)
0AA4: C8 05 ; 9 1 Enemy Explosion Component (white-noise)
0AA6: 1B 06 ; A 0 Tracker or Bomb Explosion
0AA8: 5E 06 ; B 0 Squad Appears
0AAA: 95 06 ; C 1 1st Boss
0AAC: D9 06 ; D 1 2nd Boss
0AAE: 15 07 ; E 1 3rd Boss
0AB0: 5C 07 ; F 1 4th Boss
0AB2: 8A 07 ; 10 1 5th Boss
0AB4: C6 07 ; 11 1 User Explosion Component
0AB6: 0B 08 ; 12 1 User Explosion Component
0AB8: 57 08 ; 13 2 User Explosion Component
0ABA: D0 08 ; 14 2 User Explosion Component
0ABC: 44 09 ; 15 1 User Explosion Component
0ABE: 9C 09 ; 16 0 Pickup Parachute
0AC0: D1 09 ; 17 1 Free Man
0AC2: 02 0A ; 18 0 Time Jump 1
0AC4: 4B 0A ; 19 0 Time Jump 2
0AC6: 16 0B ; 1A 0 Initialize song 2
0AC8: 1A 0B ; 1B 1 Initialize song 1
0ACA: 3B 0B ; 1C 0 Initialize music D1
0ACC: 3B 0B ; 1D 0 Initialize music D2
0ACE: 3B 0B ; 1E 0 Initialize music D3
0AD0: 3B 0B ; 1F 0 Initialize music D4
0AD2: 3B 0B ; 20 0 Initialize music D5
; Continue sound routines
0AD4: 00 00 ; 0 Place holder for stop-all-commands
0AD6: 02 04 ; 1
0AD8: 4B 04 ; 2
0ADA: 7A 04 ; 3
0ADC: B3 04 ; 4
0ADE: F5 04 ; 5
0AE0: 28 05 ; 6
0AE2: 6C 05 ; 7
0AE4: A4 05 ; 8
0AE6: EA 05 ; 9
0AE8: 3A 06 ; A
0AEA: 77 06 ; B
0AEC: B4 06 ; C
0AEE: F6 06 ; D
0AF0: 32 07 ; E
0AF2: 74 07 ; F
0AF4: AA 07 ; 10
0AF6: E5 07 ; 11
0AF8: 29 08 ; 12
0AFA: 7F 08 ; 13
0AFC: F8 08 ; 14
0AFE: 66 09 ; 15
0B00: BC 09 ; 16
0B02: F1 09 ; 17
0B04: 20 0A ; 18
0B06: 6A 0A ; 19
0B08: 00 00 ; 1A -- Playing song 0 (never kept in buffer)
0B0A: 00 00 ; 1B -- Playing song 1 (never kept in buffer)
0B0C: 41 0B ; 1C Continue music D1
0B0E: 4A 0B ; 1D Continue music D2
0B10: 53 0B ; 1E Continue music D3
0B12: 5C 0B ; 1F Continue music D4
0B14: 65 0B ; 20 Continue music D5
Command 1A
Command1A: ; Initialization Routine Vector 1A 0B16: AF XOR A ; Play song 0 0B17: C3 1C 0B JP $0B1C ; Play it
Command 1B
Command1B: ; Initialization Routine Vector 1B 0B1A: 3E 01 LD A,$01 ; Play song 1 0B1C: CD 7E 03 CALL InitSong ; Initialize music descriptors 0B1F: 11 00 30 LD DE,$3000 ; Command table 0B22: 21 2F 0B LD HL,$0B2F ; Fill ... 0B25: 01 0C 00 LD BC,$000C ; ... simultaneous 0B28: ED B0 LDIR ; ... commands 0B2A: E1 POP HL ; Clean ... 0B2B: E1 POP HL ; ... stack frame 0B2C: C3 BF 00 JP MainLoop ; Goto main loop ; Play song command buffer 0B2F: 1C 00 ; All five music processors playing 0B31: 1D 00 ; ... 0B33: 1E 00 ; ... 0B35: 1F 00 ; ... 0B37: 20 00 ; ... 0B39: 00 00 ; ; Initialization Routine Vector 1C,1D,1E,1F,20 Music ; Do nothing. 0B3B: AF XOR A ; 0B3C: CD C8 01 CALL SetFilterCaps ; Set the filter caps 0B3F: AF XOR A ; Initialized 0B40: C9 RET ; Done ; Continue Sound Routine Vector 1C 0B41: DD 21 0F 30 LD IX,$300F ; Descriptor 1 0B45: CD FC 01 CALL MusicProcessing ; Process 0B48: AF XOR A ; Continue flag 0B49: C9 RET ; Done ; Continue Sound Routine Vector 1D 0B4A: DD 21 19 30 LD IX,$3019 ; Descriptor 2 0B4E: CD FC 01 CALL MusicProcessing ; Process 0B51: AF XOR A ; Continue flag 0B52: C9 RET ; Done ; Continue Sound Routine Vector 1E 0B53: DD 21 23 30 LD IX,$3023 ; Descriptor 3 0B57: CD FC 01 CALL MusicProcessing ; Process 0B5A: AF XOR A ; Continue flag 0B5B: C9 RET ; Done ; Continue Sound Routine Vector 1F 0B5C: DD 21 2D 30 LD IX,$302D ; Descriptor 4 0B60: CD FC 01 CALL MusicProcessing ; Process 0B63: AF XOR A ; Continue flag 0B64: C9 RET ; Done ; Continue Sound Routine Vector 20 0B65: DD 21 37 30 LD IX,$3037 ; Descriptor 5 0B69: CD FC 01 CALL MusicProcessing ; Process 0B6C: AF XOR A ; Continue flag 0B6D: C9 RET ; Done
Music Data
MusicData:
; Music pointers for songs (10 bytes each)
; Song 0 (Start of game)
0B6E: 82 0B
0B70: B2 0B
0B72: E2 0B
0B74: 08 0C
0B76: 2D 0C
; Song 1 (Enter you initials)
0B78: 2E 0C
0B7A: 70 0C
0B7C: AD 0C
0B7E: EB 0C
0B80: 04 0D
;Song data
; Start of game song
; Song 0 Descriptor 0
0B82: 1F 0E ; MusCmd0: Set base note pointer to 0326 (C4)
0B84: 3F 16 ; MusCmd1: Set base delay to 16
0B86: 5F 00 ; MusCmd2: Set initial note volume to 00
0B88: 81 ; delay=4, note=C4+0: C4
0B89: 60 ; delay=3, note=rest
0B8A: 5F 08 ; MusCmd2: Set initial note volume to 08
0B8C: 66 ; delay=3, note=C4+5: F4
0B8D: A8 ; delay=5, note=C4+7: G4
0B8E: AD ; delay=5, note=C4+12: C5
0B8F: 92 ; delay=4, note=C4+17: F5
0B90: 7F 00 ; MusCmd3: Set volume modification to 0
0B92: B1 ; delay=5, note=C4+16: E5
0B93: 91 ; delay=4, note=C4+16: E5
0B94: 7F FF ; MusCmd3: Set volume modification to -1
0B96: B1 ; delay=5, note=C4+16: E5
0B97: B2 ; delay=5, note=C4+17: F5
0B98: 91 ; delay=4, note=C4+16: E5
0B99: 7F 00 ; MusCmd3: Set volume modification to 0
0B9B: D4 ; delay=6, note=C4+19: G5
0B9C: B4 ; delay=5, note=C4+19: G5
0B9D: 7F FF ; MusCmd3: Set volume modification to -1
0B9F: B4 ; delay=5, note=C4+19: G5
0BA0: 60 ; delay=3, note=rest
0BA1: 74 ; delay=3, note=C4+19: G5
0BA2: 3F 13 ; MusCmd1: Set base delay to 13
0BA4: 77 ; delay=3, note=C4+22: A#5
0BA5: 76 ; delay=3, note=C4+21: A5
0BA6: 74 ; delay=3, note=C4+19: G5
0BA7: 74 ; delay=3, note=C4+19: G5
0BA8: 73 ; delay=3, note=C4+18: F#5
0BA9: 71 ; delay=3, note=C4+16: E5
0BAA: 71 ; delay=3, note=C4+16: E5
0BAB: 70 ; delay=3, note=C4+15: D#5
0BAC: 6D ; delay=3, note=C4+12: C5
0BAD: 6D ; delay=3, note=C4+12: C5
0BAE: 70 ; delay=3, note=C4+15: D#5
0BAF: 71 ; delay=3, note=C4+16: E5
0BB0: AD ; delay=5, note=C4+12: C5
0BB1: FF ; END
; Song 0 Descriptor 1
0BB2: 1F 02 ; MusCmd0: Set base note pointer to 02F6 (C2)
0BB4: 3F 16 ; MusCmd1: Set base delay to 16
0BB6: 5F 00 ; MusCmd2: Set initial note volume to 00
0BB8: 81 ; delay=4, note=C2+0: C2
0BB9: 60 ; delay=3, note=rest
0BBA: 5F 08 ; MusCmd2: Set initial note volume to 08
0BBC: 66 ; delay=3, note=C2+5: F2
0BBD: A8 ; delay=5, note=C2+7: G2
0BBE: AD ; delay=5, note=C2+12: C3
0BBF: 92 ; delay=4, note=C2+17: F3
0BC0: 7F 00 ; MusCmd3: Set volume modification to 0
0BC2: B1 ; delay=5, note=C2+16: E3
0BC3: 91 ; delay=4, note=C2+16: E3
0BC4: 7F FF ; MusCmd3: Set volume modification to -1
0BC6: B1 ; delay=5, note=C2+16: E3
0BC7: B2 ; delay=5, note=C2+17: F3
0BC8: 91 ; delay=4, note=C2+16: E3
0BC9: 7F 00 ; MusCmd3: Set volume modification to 0
0BCB: D4 ; delay=6, note=C2+19: G3
0BCC: B4 ; delay=5, note=C2+19: G3
0BCD: 7F FF ; MusCmd3: Set volume modification to -1
0BCF: B4 ; delay=5, note=C2+19: G3
0BD0: 60 ; delay=3, note=rest
0BD1: 74 ; delay=3, note=C2+19: G3
0BD2: 3F 13 ; MusCmd1: Set base delay to 13
0BD4: 77 ; delay=3, note=C2+22: A#3
0BD5: 76 ; delay=3, note=C2+21: A3
0BD6: 74 ; delay=3, note=C2+19: G3
0BD7: 74 ; delay=3, note=C2+19: G3
0BD8: 73 ; delay=3, note=C2+18: F#3
0BD9: 71 ; delay=3, note=C2+16: E3
0BDA: 71 ; delay=3, note=C2+16: E3
0BDB: 70 ; delay=3, note=C2+15: D#3
0BDC: 6D ; delay=3, note=C2+12: C3
0BDD: 6D ; delay=3, note=C2+12: C3
0BDE: 70 ; delay=3, note=C2+15: D#3
0BDF: 71 ; delay=3, note=C2+16: E3
0BE0: AD ; delay=5, note=C2+12: C3
0BE1: FF ; END
; Song 0 Descriptor 2
0BE2: 1F 0E ; MusCmd0: Set base note pointer to 0326 (C4)
0BE4: 3F 13 ; MusCmd1: Set base delay to 13
0BE6: 5F 08 ; MusCmd2: Set initial note volume to 08
0BE8: 8D ; delay=4, note=C4+12: C5
0BE9: 6D ; delay=3, note=C4+12: C5
0BEA: 8D ; delay=4, note=C4+12: C5
0BEB: 6D ; delay=3, note=C4+12: C5
0BEC: 8D ; delay=4, note=C4+12: C5
0BED: 6D ; delay=3, note=C4+12: C5
0BEE: 8D ; delay=4, note=C4+12: C5
0BEF: 6D ; delay=3, note=C4+12: C5
0BF0: 8D ; delay=4, note=C4+12: C5
0BF1: 6D ; delay=3, note=C4+12: C5
0BF2: 8D ; delay=4, note=C4+12: C5
0BF3: 6D ; delay=3, note=C4+12: C5
0BF4: 8D ; delay=4, note=C4+12: C5
0BF5: 6D ; delay=3, note=C4+12: C5
0BF6: 8D ; delay=4, note=C4+12: C5
0BF7: 6D ; delay=3, note=C4+12: C5
0BF8: 88 ; delay=4, note=C4+7: G4
0BF9: 68 ; delay=3, note=C4+7: G4
0BFA: 85 ; delay=4, note=C4+4: E4
0BFB: 60 ; delay=3, note=rest
0BFC: 86 ; delay=4, note=C4+5: F4
0BFD: 60 ; delay=3, note=rest
0BFE: 87 ; delay=4, note=C4+6: F#4
0BFF: 60 ; delay=3, note=rest
0C00: 7F 00 ; MusCmd3: Set volume modification to 0
0C02: CB ; delay=6, note=C4+10: A#4
0C03: 7F FF ; MusCmd3: Set volume modification to -1
0C05: AB ; delay=5, note=C4+10: A#4
0C06: AD ; delay=5, note=C4+12: C5
0C07: FF ; END
; Song 0 Descriptor 3
0C08: 1F 02 ; MusCmd0: Set base note pointer to 02F6 (C2)
0C0A: 3F 13 ; MusCmd1: Set base delay to 13
0C0C: 5F 08 ; MusCmd2: Set initial note volume to 08
0C0E: 8D ; delay=4, note=C2+12: C3
0C0F: 6D ; delay=3, note=C2+12: C3
0C10: 8D ; delay=4, note=C2+12: C3
0C11: 6D ; delay=3, note=C2+12: C3
0C12: 8D ; delay=4, note=C2+12: C3
0C13: 6D ; delay=3, note=C2+12: C3
0C14: 8D ; delay=4, note=C2+12: C3
0C15: 6D ; delay=3, note=C2+12: C3
0C16: 8D ; delay=4, note=C2+12: C3
0C17: 6D ; delay=3, note=C2+12: C3
0C18: 8D ; delay=4, note=C2+12: C3
0C19: 6D ; delay=3, note=C2+12: C3
0C1A: 8D ; delay=4, note=C2+12: C3
0C1B: 6D ; delay=3, note=C2+12: C3
0C1C: 8D ; delay=4, note=C2+12: C3
0C1D: 6D ; delay=3, note=C2+12: C3
0C1E: 88 ; delay=4, note=C2+7: G2
0C1F: 68 ; delay=3, note=C2+7: G2
0C20: 85 ; delay=4, note=C2+4: E2
0C21: 60 ; delay=3, note=rest
0C22: 86 ; delay=4, note=C2+5: F2
0C23: 60 ; delay=3, note=rest
0C24: 87 ; delay=4, note=C2+6: F#2
0C25: 60 ; delay=3, note=rest
0C26: 7F 00 ; MusCmd3: Set volume modification to 0
0C28: CB ; delay=6, note=C2+10: A#2
0C29: 7F FF ; MusCmd3: Set volume modification to -1
0C2B: AB ; delay=5, note=C2+10: A#2
0C2C: AD ; delay=5, note=C2+12: C3
; Song 0 Descriptor 4
0C2D: FF ; END
; Enter-your-initials song. This loops.
; Song 1 Descriptor 0
0C2E: 1F 0E ; MusCmd0: Set base note pointer to 0326 (C4 middle C)
0C30: 3F 15 ; MusCmd1: Set base delay to 15
0C32: 5F 00 ; MusCmd2: Set initial note volume to 00
0C34: 81 ; delay=4, note=C4+0: C4
0C35: 5F 07 ; MusCmd2: Set initial note volume to 07
0C37: 65 ; delay=3, note=C4+4: E4
0C38: 65 ; delay=3, note=C4+4: E4
0C39: 25 ; delay=1, note=C4+4: E4
0C3A: 25 ; delay=1, note=C4+4: E4
0C3B: 25 ; delay=1, note=C4+4: E4
0C3C: 25 ; delay=1, note=C4+4: E4
0C3D: A5 ; delay=5, note=C4+4: E4
0C3E: 85 ; delay=4, note=C4+4: E4
0C3F: 65 ; delay=3, note=C4+4: E4
0C40: 85 ; delay=4, note=C4+4: E4
0C41: 65 ; delay=3, note=C4+4: E4
0C42: 65 ; delay=3, note=C4+4: E4
0C43: 80 ; delay=4, note=rest
0C44: 65 ; delay=3, note=C4+4: E4
0C45: 65 ; delay=3, note=C4+4: E4
0C46: 25 ; delay=1, note=C4+4: E4
0C47: 25 ; delay=1, note=C4+4: E4
0C48: 25 ; delay=1, note=C4+4: E4
0C49: 25 ; delay=1, note=C4+4: E4
0C4A: A5 ; delay=5, note=C4+4: E4
0C4B: 85 ; delay=4, note=C4+4: E4
0C4C: 65 ; delay=3, note=C4+4: E4
0C4D: 61 ; delay=3, note=C4+0: C4
0C4E: 68 ; delay=3, note=C4+7: G4
0C4F: 6C ; delay=3, note=C4+11: B4
0C50: 6F ; delay=3, note=C4+14: D5
0C51: 80 ; delay=4, note=rest
0C52: 6A ; delay=3, note=C4+9: A4
0C53: 6A ; delay=3, note=C4+9: A4
0C54: 2A ; delay=1, note=C4+9: A4
0C55: 2A ; delay=1, note=C4+9: A4
0C56: 2A ; delay=1, note=C4+9: A4
0C57: 2A ; delay=1, note=C4+9: A4
0C58: AA ; delay=5, note=C4+9: A4
0C59: 8A ; delay=4, note=C4+9: A4
0C5A: 6A ; delay=3, note=C4+9: A4
0C5B: 8A ; delay=4, note=C4+9: A4
0C5C: 6A ; delay=3, note=C4+9: A4
0C5D: 6A ; delay=3, note=C4+9: A4
0C5E: 80 ; delay=4, note=rest
0C5F: 6A ; delay=3, note=C4+9: A4
0C60: 6A ; delay=3, note=C4+9: A4
0C61: 2A ; delay=1, note=C4+9: A4
0C62: 2A ; delay=1, note=C4+9: A4
0C63: 2A ; delay=1, note=C4+9: A4
0C64: 2A ; delay=1, note=C4+9: A4
0C65: AA ; delay=5, note=C4+9: A4
0C66: 8A ; delay=4, note=C4+9: A4
0C67: 68 ; delay=3, note=C4+7: G4
0C68: 68 ; delay=3, note=C4+7: G4
0C69: 68 ; delay=3, note=C4+7: G4
0C6A: 6A ; delay=3, note=C4+9: A4
0C6B: 6A ; delay=3, note=C4+9: A4
0C6C: 80 ; delay=4, note=rest
0C6D: DF 37 0C ; MusCmd6: GOTO 0C37
; Song 1 Descriptor 1
0C70: 1F 0E ; MusCmd0: Set base note pointer to 0326 (C4 middle C)
0C72: 3F 15 ; MusCmd1: Set base delay to 15
0C74: 5F 00 ; MusCmd2: Set initial note volume to 00
0C76: 81 ; delay=4, note=C4+0: C4
0C77: 5F 07 ; MusCmd2: Set initial note volume to 07
0C79: 68 ; delay=3, note=C4+7: G4
0C7A: 68 ; delay=3, note=C4+7: G4
0C7B: 28 ; delay=1, note=C4+7: G4
0C7C: 28 ; delay=1, note=C4+7: G4
0C7D: 28 ; delay=1, note=C4+7: G4
0C7E: 28 ; delay=1, note=C4+7: G4
0C7F: A8 ; delay=5, note=C4+7: G4
0C80: 88 ; delay=4, note=C4+7: G4
0C81: 68 ; delay=3, note=C4+7: G4
0C82: 88 ; delay=4, note=C4+7: G4
0C83: 68 ; delay=3, note=C4+7: G4
0C84: 68 ; delay=3, note=C4+7: G4
0C85: 80 ; delay=4, note=rest
0C86: 68 ; delay=3, note=C4+7: G4
0C87: 68 ; delay=3, note=C4+7: G4
0C88: 28 ; delay=1, note=C4+7: G4
0C89: 28 ; delay=1, note=C4+7: G4
0C8A: 28 ; delay=1, note=C4+7: G4
0C8B: 28 ; delay=1, note=C4+7: G4
0C8C: A8 ; delay=5, note=C4+7: G4
0C8D: 88 ; delay=4, note=C4+7: G4
0C8E: A8 ; delay=5, note=C4+7: G4
0C8F: 60 ; delay=3, note=rest
0C90: 80 ; delay=4, note=rest
0C91: 6D ; delay=3, note=C4+12: C5
0C92: 6D ; delay=3, note=C4+12: C5
0C93: 2D ; delay=1, note=C4+12: C5
0C94: 2D ; delay=1, note=C4+12: C5
0C95: 2D ; delay=1, note=C4+12: C5
0C96: 2D ; delay=1, note=C4+12: C5
0C97: AD ; delay=5, note=C4+12: C5
0C98: 8D ; delay=4, note=C4+12: C5
0C99: 6D ; delay=3, note=C4+12: C5
0C9A: 8D ; delay=4, note=C4+12: C5
0C9B: 6D ; delay=3, note=C4+12: C5
0C9C: 6D ; delay=3, note=C4+12: C5
0C9D: 80 ; delay=4, note=rest
0C9E: 6D ; delay=3, note=C4+12: C5
0C9F: 6D ; delay=3, note=C4+12: C5
0CA0: 2D ; delay=1, note=C4+12: C5
0CA1: 2D ; delay=1, note=C4+12: C5
0CA2: 2D ; delay=1, note=C4+12: C5
0CA3: 2D ; delay=1, note=C4+12: C5
0CA4: AD ; delay=5, note=C4+12: C5
0CA5: 8D ; delay=4, note=C4+12: C5
0CA6: 6D ; delay=3, note=C4+12: C5
0CA7: 6D ; delay=3, note=C4+12: C5
0CA8: 6D ; delay=3, note=C4+12: C5
0CA9: AD ; delay=5, note=C4+12: C5
0CAA: DF 79 0C ; MusCmd6: GOTO 0C79
; Song 1 Descriptor 2
0CAD: 1F 0E ; MusCmd0: Set base note pointer to 0326 (C4 middle C)
0CAF: 3F 15 ; MusCmd1: Set base delay to 15
0CB1: 5F 00 ; MusCmd2: Set initial note volume to 00
0CB3: 81 ; delay=4, note=C4+0: C4
0CB4: 5F 07 ; MusCmd2: Set initial note volume to 07
0CB6: 6C ; delay=3, note=C4+11: B4
0CB7: 6C ; delay=3, note=C4+11: B4
0CB8: 2C ; delay=1, note=C4+11: B4
0CB9: 2C ; delay=1, note=C4+11: B4
0CBA: 2C ; delay=1, note=C4+11: B4
0CBB: 2C ; delay=1, note=C4+11: B4
0CBC: AC ; delay=5, note=C4+11: B4
0CBD: 8C ; delay=4, note=C4+11: B4
0CBE: 6C ; delay=3, note=C4+11: B4
0CBF: 8C ; delay=4, note=C4+11: B4
0CC0: 6C ; delay=3, note=C4+11: B4
0CC1: 6C ; delay=3, note=C4+11: B4
0CC2: 80 ; delay=4, note=rest
0CC3: 6C ; delay=3, note=C4+11: B4
0CC4: 6C ; delay=3, note=C4+11: B4
0CC5: 2C ; delay=1, note=C4+11: B4
0CC6: 2C ; delay=1, note=C4+11: B4
0CC7: 2C ; delay=1, note=C4+11: B4
0CC8: 2C ; delay=1, note=C4+11: B4
0CC9: AC ; delay=5, note=C4+11: B4
0CCA: 8C ; delay=4, note=C4+11: B4
0CCB: AC ; delay=5, note=C4+11: B4
0CCC: 60 ; delay=3, note=rest
0CCD: 80 ; delay=4, note=rest
0CCE: 72 ; delay=3, note=C4+17: F5
0CCF: 72 ; delay=3, note=C4+17: F5
0CD0: 32 ; delay=1, note=C4+17: F5
0CD1: 32 ; delay=1, note=C4+17: F5
0CD2: 32 ; delay=1, note=C4+17: F5
0CD3: 32 ; delay=1, note=C4+17: F5
0CD4: B2 ; delay=5, note=C4+17: F5
0CD5: 92 ; delay=4, note=C4+17: F5
0CD6: 72 ; delay=3, note=C4+17: F5
0CD7: 92 ; delay=4, note=C4+17: F5
0CD8: 72 ; delay=3, note=C4+17: F5
0CD9: 72 ; delay=3, note=C4+17: F5
0CDA: 80 ; delay=4, note=rest
0CDB: 72 ; delay=3, note=C4+17: F5
0CDC: 72 ; delay=3, note=C4+17: F5
0CDD: 32 ; delay=1, note=C4+17: F5
0CDE: 32 ; delay=1, note=C4+17: F5
0CDF: 32 ; delay=1, note=C4+17: F5
0CE0: 32 ; delay=1, note=C4+17: F5
0CE1: B2 ; delay=5, note=C4+17: F5
0CE2: 92 ; delay=4, note=C4+17: F5
0CE3: 72 ; delay=3, note=C4+17: F5
0CE4: 72 ; delay=3, note=C4+17: F5
0CE5: 72 ; delay=3, note=C4+17: F5
0CE6: 92 ; delay=4, note=C4+17: F5
0CE7: 80 ; delay=4, note=rest
0CE8: DF B6 0C ; MusCmd6: GOTO 0CB6
; Song 1 Descriptor 3
0CEB: 1F 0E ; MusCmd0: Set base note pointer to 0326 (C4 middle C)
0CED: 3F 15 ; MusCmd1: Set base delay to 15
0CEF: 5F 00 ; MusCmd2: Set initial note volume to 00
0CF1: E1 ; delay=7, note=C4+0: C4
0CF2: E0 ; delay=7, note=rest
0CF3: E0 ; delay=7, note=rest
0CF4: C0 ; delay=6, note=rest
0CF5: A0 ; delay=5, note=rest
0CF6: 5F 07 ; MusCmd2: Set initial note volume to 07
0CF8: 78 ; delay=3, note=C4+23: B5
0CF9: 74 ; delay=3, note=C4+19: G5
0CFA: 79 ; delay=3, note=C4+24: C6
0CFB: 76 ; delay=3, note=C4+21: A5
0CFC: E0 ; delay=7, note=rest
0CFD: E0 ; delay=7, note=rest
0CFE: E0 ; delay=7, note=rest
0CFF: C0 ; delay=6, note=rest
0D00: A0 ; delay=5, note=rest
0D01: DF F8 0C ; MusCmd6: GOTO 0CF8
; Song 1 Descriptor 4
0D04: 1F 02 ; MusCmd0: Set base note pointer to 02F6 (C2)
0D06: 3F 15 ; MusCmd1: Set base delay to 15
0D08: 5F 07 ; MusCmd2: Set initial note volume to 07
0D0A: 8D ; delay=4, note=C2+12: C3
0D0B: 60 ; delay=3, note=rest
0D0C: 6D ; delay=3, note=C2+12: C3
0D0D: 88 ; delay=4, note=C2+7: G2
0D0E: 60 ; delay=3, note=rest
0D0F: 6D ; delay=3, note=C2+12: C3
0D10: 60 ; delay=3, note=rest
0D11: 6D ; delay=3, note=C2+12: C3
0D12: 60 ; delay=3, note=rest
0D13: 6D ; delay=3, note=C2+12: C3
0D14: 28 ; delay=1, note=C2+7: G2
0D15: 28 ; delay=1, note=C2+7: G2
0D16: 28 ; delay=1, note=C2+7: G2
0D17: 28 ; delay=1, note=C2+7: G2
0D18: 88 ; delay=4, note=C2+7: G2
0D19: 60 ; delay=3, note=rest
0D1A: 8D ; delay=4, note=C2+12: C3
0D1B: 60 ; delay=3, note=rest
0D1C: 6D ; delay=3, note=C2+12: C3
0D1D: 88 ; delay=4, note=C2+7: G2
0D1E: 60 ; delay=3, note=rest
0D1F: 6D ; delay=3, note=C2+12: C3
0D20: 60 ; delay=3, note=rest
0D21: 6D ; delay=3, note=C2+12: C3
0D22: 60 ; delay=3, note=rest
0D23: 6D ; delay=3, note=C2+12: C3
0D24: 88 ; delay=4, note=C2+7: G2
0D25: 6D ; delay=3, note=C2+12: C3
0D26: 68 ; delay=3, note=C2+7: G2
0D27: 8F ; delay=4, note=C2+14: D3
0D28: 60 ; delay=3, note=rest
0D29: 6F ; delay=3, note=C2+14: D3
0D2A: 8A ; delay=4, note=C2+9: A2
0D2B: 60 ; delay=3, note=rest
0D2C: 6F ; delay=3, note=C2+14: D3
0D2D: 60 ; delay=3, note=rest
0D2E: 6F ; delay=3, note=C2+14: D3
0D2F: 60 ; delay=3, note=rest
0D30: 6F ; delay=3, note=C2+14: D3
0D31: 2A ; delay=1, note=C2+9: A2
0D32: 2A ; delay=1, note=C2+9: A2
0D33: 2A ; delay=1, note=C2+9: A2
0D34: 2A ; delay=1, note=C2+9: A2
0D35: 8A ; delay=4, note=C2+9: A2
0D36: 60 ; delay=3, note=rest
0D37: 8F ; delay=4, note=C2+14: D3
0D38: 60 ; delay=3, note=rest
0D39: 6F ; delay=3, note=C2+14: D3
0D3A: 8A ; delay=4, note=C2+9: A2
0D3B: 60 ; delay=3, note=rest
0D3C: 8F ; delay=4, note=C2+14: D3
0D3D: 8F ; delay=4, note=C2+14: D3
0D3E: 6F ; delay=3, note=C2+14: D3
0D3F: 6A ; delay=3, note=C2+9: A2
0D40: 6F ; delay=3, note=C2+14: D3
0D41: 6A ; delay=3, note=C2+9: A2
0D42: 6E ; delay=3, note=C2+13: C#3
0D43: DF 0A 0D ; MusCmd6: GOTO 0D0A
; ?? Is this a song fragment left over from something else?
; ?? It reference sound command 5, which has been removed to
; ?? end-of-song.
0D46: 1F 0E ; MusCmd0: Set base note pointer to 0326 (C4 middle C)
0D48: 3F 16 ; MusCmd1: Set base delay to 16
0D4A: 5F 09 ; MusCmd2: Set initial note volume to 09
0D4C: BF B3 ; MusCmd5: ??? B3
; These are probably not notes. They are probably data bytes for command 5?
0D4E: B2 ; delay=5, note=C4+17: F5
0D4F: A9 ; delay=5, note=C4+8: G#4
0D50: B0 ; delay=5, note=C4+15: D#5
0D51: B9 ; delay=5, note=C4+24: C6
0D52: BB ; delay=5, note=C4+26: D6
0D53: BA ; delay=5, note=C4+25: C#6
0D54: AE ; delay=5, note=C4+13: C#5
0D55: E2 ; delay=7, note=C4+1: C#4
0D56: B7 ; delay=5, note=C4+22: A#5
0D57: B3 ; delay=5, note=C4+18: F#5
0D58: B4 ; delay=5, note=C4+19: G5
0D59: C1 ; delay=6, note=C4+0: C4
0D5A: B5 ; delay=5, note=C4+20: G#5
0D5B: B9 ; delay=5, note=C4+24: C6
0D5C: FF ; END
; Not used (space on the end of the ROM)
0D5D: FF FF FF
0D60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0D70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0D80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0D90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0DA0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0DB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0DC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0DD0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0DE0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0DF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0E90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0EA0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0EB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0EC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0ED0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0EE0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0EF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0F90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0FA0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0FB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0FC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0FD0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0FE0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0FF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF