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diff --git a/docs/AX25-NATIVE-CODEC.md b/docs/AX25-NATIVE-CODEC.md new file mode 100644 index 0000000..a865e9c --- /dev/null +++ b/docs/AX25-NATIVE-CODEC.md @@ -0,0 +1,33 @@ +# AX.25 native codec · MAX25-Stack 1.8.0 + +In-tree userspace AX.25 encode/decode — no kernel AX.25 required for max25d. + +## Component matrix + +| Module | Role | +|--------|------| +| `ax25_codec.py` | Address encode/decode, FCS | +| `kiss_bridge.py` | KISS frame wrap/unwrap | +| `banlist.py` | Source address ban list | + +## Build matrix + +| Option | Default | Effect | +|--------|---------|--------| +| `MAX25_BUNDLE_AX25` | OFF | Vendored ax25-apps tarballs reference-only | +| In-tree codec | always | Used by max25d and terminal | + +## FCS matrix + +| Direction | Rule | +|-----------|------| +| To TNC (KISS DATA) | FCS stripped | +| From TNC (RX) | FCS validated in codec | +| UI frames | Built in terminal or HyBBX attach path | + +## Related + +| Goal | Doc | +|------|-----| +| Packet radio | [PACKET-RADIO.md](PACKET-RADIO.md) | +| Hardware acceptance | [HARDWARE-ACCEPTANCE.md](HARDWARE-ACCEPTANCE.md) | |