SAMPLE_NAME_LENGTH
INSTRUMENT_NAME_LENGTH
MODULE_NAME_LENGTH
TRACKER_NAME_LENGTH
PATTERN_ORDER_TABLE_LENGTH
NUM_NOTES
NUM_ENVELOPE_POINTS
MAX_NUM_ROWS
XM_SAMPLE_RAMPING_POINTS

READ_U8
READ_U16
READ_U32
READ_MEMCPY

memcpy_pad
moddata
moddata_length
ptr
offset
length

XM_CLAMP_UP1F
XM_CLAMP_UP
XM_CLAMP_DOWN1F
XM_CLAMP_DOWN
XM_CLAMP2F
XM_CLAMP
XM_SLIDE_TOWARDS
XM_LERP
XM_INVERSE_LERP
HAS_TONE_PORTAMENTO
HAS_ARPEGGIO
HAS_VIBRATO
NOTE_IS_VALID

vol
limit
up
down
goal
incr
val
u
v
t
lerp
s
effect_type
volume_column
effect_param
n

XM_TRIGGER_KEEP_VOLUME
XM_TRIGGER_KEEP_PERIOD
XM_TRIGGER_KEEP_SAMPLE_POSITION

MUSIC_XM
MUSIC_XM_LEN
