34 lines
1.6 KiB
Plaintext
34 lines
1.6 KiB
Plaintext
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note: this is a continuation of rl2doc! see that first for more context
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opl3 data table entry
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offset | size | token | description
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----------|----------|-------|--------------------------------------------------
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0 | 28 | | opl3 parameters
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instrument entry
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offset | size | token | description
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----------|----------|-------|--------------------------------------------------
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0 | 3 | | ascii signature 'O3_'
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3 | 12 | | null padded, null terminated instrument name
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15 | 5 | | unknown (always 01 00 00 00 00)
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21 | 2 | | offset into file (inside opl3 data table)
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23 | 2 | | unknown (all zero)
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25 | 2 | | unknown (either size of this table or size of
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| | | opl3 data table entry; always 28)
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27 | 2 | | unknown (either size of this table or size of
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| | | opl3 data table entry; always 28)
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TODO: offsets are wrong! sizes are correct
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main header
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offset | size | token | description
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----------|----------|-------|--------------------------------------------------
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0 | 30 | | ascii signature 'Accomp. Bank, (C) AdLib Inc\x00
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| | | \x01\x01'
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31 | 10 | | unknown (all zero)
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41 | 2 | | multiply by 28, then add 48 to get offset
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| | | to the start of the opl3 data table
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42 | 2 | is | number of defined instruments
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44 | 4 | | unknown (all zero)
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48 | [is]*28 | int | instrument name table
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