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update format.md

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tildearrow 2022-06-29 01:56:57 -05:00
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papers/format.md
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@ -25,10 +25,14 @@ the format has changed several times across versions. a `(>=VER)` indicates this
furthermore, an `or reserved` indicates this field is always present, but is reserved when the version condition is not met.
the `size of this block` fields represent the size of a block excluding the ID and the aforementioned field.
these fields are 0 in format versions prior to 100 (0.6pre1).
# format versions
the format versions are:
- 100: Furnace 0.6pre1
- 99: Furnace dev99
- 98: Furnace dev98
- 97: Furnace dev97
@ -130,7 +134,7 @@ size | description
size | description
-----|------------------------------------
4 | "INFO" block ID
4 | size of the block excluding the ID and this field
4 | size of this block
1 | time base (of first song)
1 | speed 1 (of first song)
1 | speed 2 (of first song)
@ -332,7 +336,7 @@ the way it's currently done is really weird, but it provides for some backwards
size | description
-----|------------------------------------
4 | "SONG" block ID
4 | size of the block excluding the ID and this field
4 | size of this block
1 | time base
1 | speed 1
1 | speed 2
@ -386,7 +390,7 @@ notes:
size | description
-----|------------------------------------
4 | "INST" block ID
4 | size of the block excluding the ID and this field
4 | size of this block
2 | format version (see header)
1 | instrument type
| - 0: standard
@ -795,7 +799,7 @@ size | description
size | description
-----|------------------------------------
4 | "WAVE" block ID
4 | size of the block excluding the ID and this field
4 | size of this block
STR | wavetable name
4 | wavetable size
4 | wavetable min
@ -809,7 +813,7 @@ size | description
size | description
-----|------------------------------------
4 | "SMPL" block ID
4 | size of the block excluding the ID and this field
4 | size of this block
STR | sample name
4 | length
4 | rate
@ -841,7 +845,7 @@ size | description
size | description
-----|------------------------------------
4 | "PATR" block ID
4 | size of the block excluding the ID and this field
4 | size of this block
2 | channel
2 | pattern index
2 | subsong (>=95) or reserved