94 lines
2.0 KiB
Plaintext
94 lines
2.0 KiB
Plaintext
( dev/audio )
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%MOD { DUP2 DIV MUL SUB }
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@timer $1
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@progress $1
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( devices )
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|00 @System [ &vector $2 &pad $6 &r $2 &g $2 &b $2 ]
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|20 @Screen [ &vector $2 &width $2 &height $2 &pad $2 &x $2 &y $2 &addr $2 &color $1 ]
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|30 @Audio [ &wave $2 &env $2 &pad $4 &vol $1 &pitch $1 &play $1 &value $2 &delay $2 &finish $1 ]
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|0100 ( -> )
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( set color pallete )
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#00ff .System/r DEO2
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#0f0f .System/g DEO2
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#0ff0 .System/b DEO2
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;on-frame .Screen/vector DEO2 ( run on-frame every 1/60th of a second )
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#ff .Audio/vol DEO ( set volume to max )
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;saw .Audio/wave DEO2 ( set waveform to saw for audio engine )
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;env .Audio/env DEO2 ( set envelope for audio engine )
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BRK
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@on-frame ( -> )
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( incr ) .timer PEK #01 ADD .timer POK
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( skip ) .timer PEK #10 EQU ,&play-note JNZ BRK &play-note
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( get note )
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;melody #00 .progress PEK ADD2 GET
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( play note )
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DUP #80 ORA .Audio/pitch DEO
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#01 .Audio/play DEO
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( erase last note )
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#20 .Screen/color DEO
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( draw note )
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#00 SWP #0004 MUL2 #0100 SUB2 .Screen/y DEO2
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#00 .progress PEK #0008 MUL2 .Screen/x DEO2
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;dot .Screen/addr DEO2
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#21 .Screen/color DEO
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( incr ) .progress PEK #01 ADD #20 MOD .progress POK
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#00 .timer POK
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BRK
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@silence ( -> )
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BRK
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( defines a sawtooth wave. )
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@saw ( -> )
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#6000 .Audio/value DEO2
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#0000 .Audio/delay DEO2 ( move to volume #600 after 0 delay )
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#0000 .Audio/value DEO2
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#ffff .Audio/delay DEO2 ( reach volume 0 after the whole note. Interpolated linearly )
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BRK
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( defines an envelope )
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@env ( -> )
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#ffff .Audio/value DEO2
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#1000 .Audio/delay DEO2 ( move pretty quickly to volume #ffff (maximum) )
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#0000 .Audio/value DEO2
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#4000 .Audio/delay DEO2 ( interpolating linearly, move to #0000 after a delay of #4000 where #8000 is half a second )
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#00 .Audio/finish DEO ( end the envelope )
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BRK
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( song data, #ff is used for a rest )
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@melody [
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54 52 54 4f 4b 4f 48 ff
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54 52 54 4f 4b 4f 48 ff
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54 56 57 56 57 54 56 54
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56 52 54 52 54 50 54 ff
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]
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( dot sprite )
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@dot [ 003c 7eff 7e3c 0000 ]
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