47 lines
2.1 KiB
Plaintext
47 lines
2.1 KiB
Plaintext
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notes:
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- when offset is given as token+constant, take the offset of the *last* byte of
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the token rather than the first when calculating the offset
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- everything is in little endian; jukebox gold was made for 8086
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instrument
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offset | size | token | description
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----------|----------|-------|--------------------------------------------------
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0 | 3 | | flags uuuuuuuu uuuuuuuu uuuuuuuf
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| | | u - unknown
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| | | f - instrument is a pcm sample. if unset, the
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| | | instrument is found in opl3.bnk (? TODO)
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3 | 11 | | null padded instrument name
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adlib instrument
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offset | size | token | description
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----------|----------|-------|--------------------------------------------------
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0 | 28 | | 0xAA repeated
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28 | 28 | | unknown (possibly opl3 parameters?)
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main header
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offset | size | token | description
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----------|----------|-------|--------------------------------------------------
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0 | 27 | | ascii signature '>>> VC2, (C) ADLIB INC <<<\x0E'
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27 | 1 | | always 0
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28 | 1 | | unknown
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29 | 3 | | always 0, 2, 0
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32 | 2 | | unknown, likely tempo?
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34 | 1 | | unknown
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35 | 2 | | always 1, 0
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37 | 1 | | unknown
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38 | 2 | | always 0
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40 | 24 | | unknown
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64 | 22 | | 0x7F repeated
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86 | 40 | | null padded song name
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126 | 1 | | unknown
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127 | 2 | | always 0xFFFF
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129 | 23 | | always 0
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152 | 2 | | unknown
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154 | 2 | | size of song data
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156 | 274 | | unknown
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430 | 2 | is | number of instruments
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432 | [is]*14 | it | instrument table
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it+1 | itn*56 | ait | adlib instrument table. itn is calculated as the
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| | | number of instruments that do not have flag f set
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ait+1 |
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