Play 8 bars of Twinkle Twinkle Little Star on PSG with accompaniment.
Using original PSG Sound Driver for Z80 (psgdrv.asm )
GNU make
clang (for building the depended tools)
z88dk
require z80asm command in this example
cd fcs80/example/psg
makeSequence data specification
Byte 1
Byte 2
Description
$0x
$xx
Ch0 tone = $xxx
$1x
$xx
Ch1 tone = $xxx
$2x
$xx
Ch2 tone = $xxx
$3x
-
Ch0 key-on & initial volume (0 ~ 15)
$4x
-
Ch0 key-on & initial volume (0 ~ 15)
$5x
-
Ch0 key-on & initial volume (0 ~ 15)
$60
$xx
Ch0 volume down interval (software envelope of Ch0)
$61
$xx
Ch1 volume down interval (software envelope of Ch1)
$62
$xx
Ch2 volume down interval (software envelope of Ch2)
$63
$xx
Wait $xx frames (1 frame = 1/60 sec)
$64
$xx
Noise = $xx
$65
$xx
Mixing = $xx
$66
-
Set loop mark
$67
-
Jump to loop mark
$70
$xx
Ch0 pitch down (0: disabled, 1~255: down Hz/f)
$71
$xx
Ch1 pitch down (0: disabled, 1~255: down Hz/f)
$72
$xx
Ch2 pitch down (0: disabled, 1~255: down Hz/f)
$73
$xx
Ch0 pitch up (0: disabled, 1~255: up Hz/f)
$74
$xx
Ch1 pitch up (0: disabled, 1~255: up Hz/f)
$75
$xx
Ch2 pitch up (0: disabled, 1~255: up Hz/f)
$FF
-
End of sequence data
Offset
Usage
$0000
Sequence position (low)
$0001
Sequence position (high)
$0002
Wait Counter
$0003
Ch0 volume down interval
$0004
Ch1 volume down interval
$0005
Ch2 volume down interval
$0006
Ch0 volume down counter
$0007
Ch1 volume down counter
$0008
Ch2 volume down counter