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2026-05-13 18:45:10 +10:00
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docs/pt2-protocol-summary.md
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@@ -188,6 +188,32 @@ What does not work:
- The CALL path is real and useful for probing, but is not currently the
activation handshake.
## Known Response Families
These are the response frames that are stable enough to treat as known working
observations. "Meaning" here is still an engineering interpretation, not a
confirmed Sony definition.
| Frame / family | Trigger | Confidence | Best current meaning |
| --- | --- | --- | --- |
| `07 80 68 40 30 C5` | `00 -> A0` | high | readable query/status block, not a generic ACK |
| `07 80 6C 40 30 C1` | `00 -> B0` | high | readable query/status block, not a generic ACK |
| `07 80 6D 20 D8 48` | `00 -> B5` | high | readable discovery/status block |
| `07 80 45 20 D0 68` | synthetic CALL high/low pair | high | CALL event-path response |
| `07 80 45 30 D0 78` | CALL timing test, seen once | low | sibling CALL-response-family frame |
| `07 80 40 40 30 ED` | some heartbeat-only cadence runs | medium | transient heartbeat/context response family |
| `07 80 40 60 30 CD` | some heartbeat-only cadence runs | low-medium | transient heartbeat/context response family |
| `07 80 C0 40 30 6D` | some heartbeat-only cadence runs | medium | transient heartbeat/context response family |
Current caution:
- No response family is yet confirmed as a true session-advance `ACK` or `OK`
frame.
- The `68` / `6C` / `6D` families behave more like readable blocks than simple
acknowledgements.
- The `45` family behaves like an event response, not a generic accept.
- The `40` / `C0` family currently looks state- or cadence-sensitive.
## What We Know
- The link is RS-232-like, not TTL.