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clarify which bytes we're referring to

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Quinn
2025-08-25 13:44:01 +02:00
parent 17357d4672
commit 1f46640e49
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docs/mc-data-spec.md
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@@ -98,8 +98,8 @@ The offset of a chunk (x,z) (in chunk coordinates) in the first table can be fou
| data | locations (4B) | timestamps (4B) | chunks and unused space |
##### chunk location
Location info for a chunk is stored as a 32 bit big-endian integer, where the first three bytes are an offset in 4KiB sectors from the start of the file.
The last byte gives the length of the chunk in 4KiB sectors. (rounded up, of course). Where chunks are always less than 1MiB in size.
Location info for a chunk is stored as a 32 bit big-endian integer, where the first three bytes (0xFFFFFF00) are an offset in 4KiB sectors from the start of the file.
The last byte (0x000000FF) gives the length of the chunk in 4KiB sectors. (rounded up, of course). Where chunks are always less than 1MiB in size.
If a chunk isn't present in the region file (e.g. because it hasn't been generated or migrated yet), both fields are zero.
##### timestamps