Amusic supports two kinds of modules. The packed module and the normal

module format. The normal format is easier to code but modules are bigger

in size (often 10 times bigger!!!).

 

 

Adlib-MOD-Format: (c)23.8.1995 - 20:10:30 by Conqueror :)

-----------------

 hex  -  dec  -  function

 

 000h      0     name of song + nullbyte

 018h     24     name of autor + nullbyte

 030h     48     [...]  26 instruments (26*34 byte)

 3A4h    932     songlen

 3A5h    933     number of patterns-1

 3A6h    934     patterntable (128 Byte)

 426h   1062     id: "<oïQUîRoR"

 42Fh   1071     version 10h=normal module

                         11h=packed module

 

if the module isn't packed:

 

 430h   1072     all patterns (count*9*3*64 Bytes)

 

 END!!!

 

 

if the module is packed:

 

 

 430h   1072     table with Trax (ptncount*9*2)

 

- A pattern is divided into 9 tracks. Here comes a table that contains a

  number (offset) for each track saved in the file.

  This is because many tracks in the song can be identical copies of only

  one track saved in the file.

 

 xxxx   xxxx     number of trax  (WORD)

 xxxx+2 xxxx+2   [...] traxdatas

 

 END!!!

 

 

A track is written in the following manner: First comes a word that

contains the position of the track in song. (pattern*9+tracknr)

Then follows the events. One event takes 3 bytes. But empty events

takes only 1 byte! You can distinguish real events from empty events

with the most significant bit of the first saved byte of the event.

If the bit is zero than you have a real event. But if the bit isn't

zero than you have to create some empty events in your current track.

To get the number of empty events just read the lower 7 bits of the byt