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HUBY_1943.asm
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HUBY_1943.asm
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; *****************************************************************************
; * Huby beeper music engine by Shiru (shiru@mail.ru) 04'11
; * updated 99b version 11'13
; * By Shiru
; *
; * Tempo mod by Chris Cowley
; *
; * Produced by Beepola v1.08.01
; ******************************************************************************
;
;
; ! Assemble with PASMO !
; ! pasmo --alocal %1.asm %1.bin
;
;
; Load the .BIN in as a cartridge ROM file. Reboot.
; And the tune from the ZX spectrum "1943" game should play through the internal speakers.
; 710 bytes in length.
;
; org $4000 ; Aquarius 4k cassette.
org $c000 ; Aquarius lower 8k cartridge
; org $e000 ; Aquarius upper 8k cartridge
; db 55,66,73,84,77,156,73,176 ; Scramble code for start of cartridge
; db 76,108,76,100,73,168,147,112 ; "8BITMILLI" with no extra byte
db 56 ;8 ; Scramble code for start of cartridge
db 66 ;B
db 73 ;I
db 84 ;T
db 77 ;
db 156 ;
db 73 ;I
db 176 ;
db 76 ;L
db 108 ;
db 76 ;L
db 100 ;
db 73 ;I
db 168 ;
db 147 ;
db 112 ; "8BITMILLI" with no extra byte
START:
LD HL,MUSICDATA
CALL HUBY_PLAY
; Only loop back to start if a key is not pressed, otherwise RETurn
; IN A,($FE)
; CPL
; AND $1F
; JR Z,START
RET
OP_INCL: EQU $2C
HUBY_PLAY: LD C,(HL) ; Read the tempo word
INC HL
LD B,(HL)
INC HL
LD E,(HL) ; Offset to pattern data is
INC HL ; kept in DE always.
LD D,(HL) ; And HL = current position in song layout.
READPOS: INC HL
LD A,(HL) ; Read the pattern number for channel 1
INC HL
OR A
RET Z ; Zero signifies the end of the song
; This code is for handling Tempo changes in the middle of a song.
; As the song data specified in Beepola (see MUSICDATA below) doesn't
; have any tempo changes, this code has been commented out to save 9
; bytes. Uncomment it if you want to use this routine to play tunes
; that contain mid-song tempo changes...
; CP $FF ; $FF signifies SET TEMPO
; JR NZ,NOT_TEMPO
; LD C,(HL)
; INC HL
; LD B,(HL)
; JR READPOS
NOT_TEMPO: PUSH HL ; Store the layout pointer
PUSH DE ; Store the pattern offset pointer
PUSH BC ; Store current tempo
LD L,(HL) ; Read the pattern number for channel 2
LD B,2 ; DJNZ through following code twice (1x for each channel)
CALC_ADR: LD H,0 ; Multiply pattern number by 8...
ADD HL,HL ; x2
ADD HL,HL ; x4
ADD HL,HL ; x8
ADD HL,DE ; Add the offset to the pattern data
PUSH HL ; Store the address of pattern data
LD L,A
DJNZ CALC_ADR ; Do the same thing for channel 2
EXX
POP HL
POP DE
LD B,8 ; Fixed pattern length = 8 rows
READ_ROW: LD A,(DE) ; Read note for channel 1
INC DE ; inc channel 1 row pointer
EXX
LD H,A
LD D,A
EXX
LD A,(HL) ; Read note for channel 2
INC HL ; inc channel 2 row pointer
EXX
LD L,A
LD E,A
CP OP_INCL ; If channel 1 note == $2C then play drum
JR Z,SET_DRUMSLIDE
XOR A
SET_DRUMSLIDE: LD (SND_SLIDE),A
POP BC ; Retrieve tempo
PUSH BC
DI
SOUND_LOOP: XOR A
DEC E
JR NZ,SND_LOOP1
LD E,L
SUB L
SND_SLIDE: NOP ; This is set to INC L for the drum sound
SND_LOOP1: DEC D
JR NZ,SND_LOOP2
LD D,H
SUB H
SND_LOOP2: SBC A,A
; and 1
; and 2
; and 4
; and 8
; AND 16
; and 32
; and 64
; and 128
;
; OR BORDER_CLR ; Remove this line to save 2 bytes if you are happy with a black border :)
; ld (26624), a
out ($fc), a
; OUT ($FE),A
;READKEYB: IN A,($FE)
; CPL
; AND $1F
; JR NZ,SND_LOOP3
DEC BC
LD A,B
OR C
JR NZ,SOUND_LOOP ; 113/123 Ts
SND_LOOP3: LD HL,$2758 ; Set HL' for returning to BASIC
EXX
EI
JR NZ,PATTERN_END
DJNZ READ_ROW
PATTERN_END: POP BC
POP DE
POP HL
JR Z,READPOS ; No key pressed, goto next pattern
RET ; Otherwise return
; ************************************************************************
; * Song data...
; ************************************************************************
BORDER_CLR: EQU $0
; *** DATA ***
MUSICDATA:
DEFW $09A0 ; Initial tempo
DEFW PATTDATA - 8 ; Ptr to start of pattern data - 8
DEFB $01
DEFB $02
DEFB $01
DEFB $03
DEFB $01
DEFB $04
DEFB $01
DEFB $05
DEFB $06
DEFB $07
DEFB $08
DEFB $09
DEFB $0A
DEFB $01
DEFB $0B
DEFB $01
DEFB $0C
DEFB $0D
DEFB $0E
DEFB $0F
DEFB $10
DEFB $11
DEFB $12
DEFB $13
DEFB $06
DEFB $07
DEFB $08
DEFB $09
DEFB $0A
DEFB $01
DEFB $0B
DEFB $01
DEFB $0C
DEFB $0D
DEFB $0E
DEFB $0F
DEFB $10
DEFB $11
DEFB $12
DEFB $13
DEFB $06
DEFB $14
DEFB $15
DEFB $01
DEFB $06
DEFB $01
DEFB $15
DEFB $01
DEFB $16
DEFB $17
DEFB $16
DEFB $18
DEFB $19
DEFB $1A
DEFB $19
DEFB $01
DEFB $1B
DEFB $1C
DEFB $1B
DEFB $1D
DEFB $16
DEFB $14
DEFB $16
DEFB $01
DEFB $1E
DEFB $1F
DEFB $1E
DEFB $20
DEFB $19
DEFB $1F
DEFB $19
DEFB $01
DEFB $21
DEFB $22
DEFB $21
DEFB $23
DEFB $24
DEFB $25
DEFB $26
DEFB $01
DEFB $16
DEFB $17
DEFB $16
DEFB $18
DEFB $19
DEFB $1A
DEFB $19
DEFB $01
DEFB $1B
DEFB $1C
DEFB $1B
DEFB $1D
DEFB $16
DEFB $14
DEFB $16
DEFB $01
DEFB $1E
DEFB $1F
DEFB $1E
DEFB $20
DEFB $19
DEFB $1F
DEFB $19
DEFB $01
DEFB $21
DEFB $22
DEFB $21
DEFB $27
DEFB $16
DEFB $25
DEFB $28
DEFB $01
DEFB $29
DEFB $01
DEFB $06
DEFB $01
DEFB $06
DEFB $07
DEFB $08
DEFB $09
DEFB $0A
DEFB $01
DEFB $0B
DEFB $01
DEFB $0C
DEFB $0D
DEFB $0E
DEFB $0F
DEFB $10
DEFB $11
DEFB $12
DEFB $13
DEFB $06
DEFB $07
DEFB $08
DEFB $2A
DEFB $0A
DEFB $01
DEFB $0B
DEFB $01
DEFB $0C
DEFB $07
DEFB $0C
DEFB $2B
DEFB $10
DEFB $2C
DEFB $2D
DEFB $2E
DEFB $06
DEFB $14
DEFB $15
DEFB $01
DEFB $06
DEFB $01
DEFB $15
DEFB $01
DEFB $16
DEFB $17
DEFB $16
DEFB $18
DEFB $19
DEFB $1A
DEFB $19
DEFB $01
DEFB $1B
DEFB $1C
DEFB $1B
DEFB $1D
DEFB $16
DEFB $14
DEFB $16
DEFB $01
DEFB $1E
DEFB $1F
DEFB $1E
DEFB $20
DEFB $19
DEFB $1F
DEFB $19
DEFB $01
DEFB $21
DEFB $22
DEFB $21
DEFB $23
DEFB $24
DEFB $25
DEFB $26
DEFB $01
DEFB $16
DEFB $17
DEFB $16
DEFB $18
DEFB $19
DEFB $1A
DEFB $19
DEFB $01
DEFB $1B
DEFB $1C
DEFB $1B
DEFB $1D
DEFB $16
DEFB $14
DEFB $16
DEFB $01
DEFB $1E
DEFB $1F
DEFB $1E
DEFB $20
DEFB $19
DEFB $1F
DEFB $19
DEFB $01
DEFB $21
DEFB $22
DEFB $21
DEFB $27
DEFB $16
DEFB $25
DEFB $28
DEFB $01
DEFB $29
DEFB $01
DEFB $06
DEFB $01
DEFB $00 ; End of song
PATTDATA:
DEFB $00, $00, $00, $00, $00, $00, $00, $00
DEFB $66, $00, $00, $00, $60, $00, $00, $00
DEFB $5B, $00, $00, $00, $56, $00, $00, $00
DEFB $51, $00, $00, $00, $4C, $00, $00, $00
DEFB $48, $00, $00, $00, $44, $00, $00, $00
DEFB $80, $00, $80, $00, $80, $00, $80, $00
DEFB $20, $00, $00, $00, $20, $00, $00, $00
DEFB $2C, $00, $80, $00, $2C, $00, $80, $00
DEFB $00, $00, $24, $00, $20, $00, $24, $00
DEFB $90, $00, $90, $00, $90, $00, $90, $00
DEFB $2C, $00, $90, $00, $2C, $00, $90, $00
DEFB $A1, $00, $A1, $00, $A1, $00, $A1, $00
DEFB $28, $00, $00, $00, $28, $00, $00, $00
DEFB $2C, $00, $A1, $00, $2C, $00, $A1, $00
DEFB $00, $00, $28, $00, $30, $00, $36, $00
DEFB $97, $00, $97, $00, $97, $00, $97, $00
DEFB $39, $00, $00, $40, $00, $00, $39, $00
DEFB $2C, $00, $88, $00, $88, $00, $88, $00
DEFB $39, $00, $00, $44, $00, $00, $39, $00
DEFB $19, $00, $00, $00, $00, $00, $00, $00
DEFB $80, $00, $80, $00, $80, $00, $90, $88
DEFB $40, $00, $80, $00, $80, $00, $40, $80
DEFB $33, $00, $00, $00, $00, $00, $00, $00
DEFB $00, $00, $00, $00, $30, $00, $2D, $00
DEFB $44, $00, $88, $00, $88, $00, $44, $88
DEFB $2B, $00, $00, $00, $00, $00, $00, $00
DEFB $4C, $00, $97, $00, $97, $00, $4C, $97
DEFB $26, $00, $00, $00, $00, $00, $00, $00
DEFB $00, $00, $22, $00, $20, $00, $1C, $00
DEFB $39, $00, $72, $00, $72, $00, $39, $72
DEFB $18, $00, $00, $00, $00, $00, $00, $00
DEFB $00, $00, $13, $00, $00, $00, $15, $00
DEFB $56, $00, $AB, $00, $AB, $00, $56, $AB
DEFB $1C, $00, $00, $00, $00, $00, $00, $00
DEFB $00, $00, $18, $00, $00, $00, $19, $00
DEFB $80, $00, $80, $40, $88, $00, $80, $40
DEFB $20, $00, $00, $00, $00, $00, $00, $00
DEFB $97, $00, $80, $40, $AB, $00, $80, $40
DEFB $2B, $00, $00, $00, $1C, $00, $00, $00
DEFB $40, $00, $80, $00, $40, $00, $40, $80
DEFB $80, $FF, $80, $FF, $80, $FF, $80, $FF
DEFB $1B, $00, $1C, $00, $20, $00, $24, $00
DEFB $1B, $00, $1C, $00, $20, $00, $1B, $00
DEFB $18, $00, $00, $20, $00, $00, $18, $00
DEFB $88, $00, $88, $00, $88, $00, $88, $00
DEFB $15, $00, $00, $1C, $00, $00, $15, $00
end