Defence Force Wiki

Wave Flat File Format

The Flat file format resides between $1003 and $7786 and contains all Music, Samples and Key preferences.

$1003 Version Header $100B Default Music Tempo $100C Spare $100D Spare $100E Spare $100F Spare $1010 List Loop Position $1011 List Memory $1091 Pattern Memory $5291 Sample Memory $7291 Sample Names $72C2 Sample Addresses $72DE Ornament Loop Positions $72ED Ornament Memory $74CD Effect Loop Positions $74DC Effect Memory $76BC\\
And now those areas in more detail..

$1003	Version Header
	“WAVE 1.0”
$100B	Default Music Tempo
	Generally 0 to 31 since Pattern Tempo command also limited to 0-31
$100C	Number of Patterns
	Default is 24 but may be expanded to 35
$100D	Spare
$100E	Spare
$100F	Spare
$1010	List Loop Position
	0-127 Loop Position
	128 No Loop

$1011	List Memory (128 Bytes)
	0-31 Pattern ID
	128 End or Loop depending on List Loop Position

$1091			Pattern Memory (16896 Bytes) arranged as 11 bytes x 64 Rows x 24 Patterns
	+00	B0-B1	EG Cycle
			0 Not Set
			1 Sawtooth (Cycle Code 8)
			2 Triangle (Cycle Code 14)
			3 Decay (Cycle Code 0)
		B2-B7	EG Period
			0 Not Set
			1-63 Period
	+01	B0-B2	Sample ID
			0 Not Set
			1-7 Sample ID
		B3-B7	Noise
			0 Not Set
			1-31 Noise Pitch
	+02	B0-B1	Volume Channel A
			0 Volume 0
			1 Volume 4
			2 Volume 8
			3 Volume 15
		B2-B7	Note
			0-61 Note
			62 Rest
			63 Bar
	+03	B0-B3	Effect
			0 No Effect
			1-15 Effect ID
		B4-B7	Ornament
			0 No Ornament
			1-15 Ornament ID
	+04	B0-B2	Command
			0 No Command
			1 Apply Channel SID
				0-F Channel SID EOR Volume
				N Noise SID
				S Status(Tone) SID
			2 Apply Buzzer SID
				0-F Buzzer SID EOR Cycle
			3 Sample
			4 Set Music Tempo
				0-31 New Music Tempo
			5 Pitchbend
				0-7 Number of Interpolations between semitones at Rate 0
				8-15 Number of Interpolations between semitones at Rate 1
				16-23 Number of Interpolations between semitones at Rate 2
				24-31 Number of Interpolations between semitones at Rate 3
			6 Trigger Out
				0-31 Trigger Value
			7 -
		B3-B7	Command Parameter

$5291	Sample Memory (8192 Bytes)
	Samples arranged in LHL format whereby B0-3 hold first Sample, then B4-7
	for second the next bytes B0-3 for third, etc.
	If a byte is 0 then End Sample

$7291	Sample Names
	Arranged 7 Names x 7 Samples

$72C2	Sample Addresses
	$72C2 Sample Start Low Address
	$72C9 Sample Start High Address
	$72D0 Sample Loop Low Address
	$72D7 Sample Loop High Address

$72DE	Ornament Loop Positions
	0-31 Loop Position
	128 No Loop

$72ED	Ornament Memory
	Arranged 32 Rows x 15 Ornaments

$74CD	Effect Loop Positions
	0-31 Loop Position
	128 No Loop

$74DC	Effect Memory
	Arranged 32 Rows x 15 Effects

$76BC

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