65 lines
2.2 KiB
Markdown
65 lines
2.2 KiB
Markdown
# Tier2 Selector-Byte Sources (2026-04-21)
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This note preserves the stock selector-byte evidence behind the current Tier-2 queue head, so the
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short queue does not have to restate the `BuildingTypes` side every time.
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## Checked Export
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- `artifacts/exports/rt3-1.06/building-type-sources.json`
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## Stock `.bca` Selector Bytes
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The checked export keeps the raw `0xb8..0xbb` selector-byte window explicit for every `.bca` file:
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- `bca_file_count = 77`
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- `bca_selector_pattern_count = 8`
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- only one checked `.bca` pattern is nonzero at all:
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- `MachineShop.bca`
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- `byte_0xb8 = 0x00`
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- `byte_0xb9 = 0x80`
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- `byte_0xba = 0x3f`
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- `byte_0xbb = 0x00`
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Everything else in the shipped `.bca` selector-byte corpus stays zero at `0xb8..0xbb`.
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## Nonzero `.bty` Alias Family
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The checked recovered-table summaries keep the nonzero `.bty` alias family explicit too:
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- `nonzero_bty_header_alias_selector_summaries`
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- `17` grouped selector summaries
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- `22` files total
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- the strongest same-root family is the `TextileMill` alias-root group:
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- `dword_0xbb = 0x000001f4`
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- `byte_0xba = 0x00`
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- `byte_0xbb = 0x00`
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- `9` files
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- sample files include `Port.bty`, `Warehouse.bty`, `ConcretePlant.bty`,
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`ConstructionFirm.bty`, and `ElectronicsPlant.bty`
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The next smaller nonzero alias-root groups are:
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- `LumberMill`
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- `4` files
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- `MeatPackingPlant`
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- `4` files
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- `Distillery`
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- `2` files
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- `Toolndie`
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- `2` files
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## Immediate Reading
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This keeps the Tier-2 source side narrower than a generic “stock assets might hide selector bytes”
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claim:
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- the shipped `.bca` selector-byte corpus is almost entirely zero
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- the one checked nonzero `.bca` outlier is `MachineShop.bca`
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- the broader stock-side nonzero signal sits instead in the `.bty` alias-root family with
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`dword_0xbb = 0x000001f4`, especially the `TextileMill` branch that already covers `Port.bty`
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and `Warehouse.bty`
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So the remaining Tier-2 question is still not “do the stock source files carry any selector-byte
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signal at all?” It is which earlier seed or projection seam lifts that narrow stock-side signal
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into the live candidate bank bytes `[candidate+0xba/+0xbb]` before `0x00412d70` and
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`0x00419230` consume it.
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