Archive protocol PDFs on disk; HDMI 2.0/FRL TI layout as VENDOR (2.81.0).

INDEX.md lists cites. PDFs gitignored. HDMI 1.4 TMDS Zdiff stays UNKNOWN. pcbsync not packed.

tests/pcb/test_protocol_pdf_pack.py

@@ -153,6 +153,15 @@ def test_dvi_not_hdmi_numeric_from_dvi_10():
     hz = next(c for c in hdmi.constraints if c.parameter == "differential_impedance")
     assert hz.value_kind == "UNKNOWN"
     assert hz.value is None
+    h20 = next(p for p in cat.physical_interfaces if p.id == "hdmi-2.0-tmds-type-a")
+    z20 = next(c for c in h20.constraints if c.parameter == "differential_impedance")
+    _cite_ok(z20)
+    assert z20.value == 90.0
+    assert z20.source_class == "VENDOR"
+    assert z20.source_type == "PHY"
+    assert z20.mandatory == "RECOMMENDED"
+    assert "TMDS1204" in z20.source.document
+    assert z20.source_class != "NORMATIVE"
     hby = {c.parameter: c for c in hdmi.constraints}
     _cite_ok(hby["cec"])
     assert hby["cec"].value == 27000.0
@@ -173,8 +182,11 @@ def test_dvi_not_hdmi_numeric_from_dvi_10():
     assert hby["cec_interconnect_resistance"].value == 5.0
     frl = next(p for p in cat.physical_interfaces if p.id == "hdmi-frl-pcb")
     fz = next(c for c in frl.constraints if c.parameter == "differential_impedance")
-    assert fz.value_kind == "UNKNOWN"
-    assert fz.value is None
+    assert fz.value == 90.0
+    assert fz.source_class == "VENDOR"
+    fdr = next(c for c in frl.constraints if c.parameter == "data_rate")
+    assert fdr.value == 12.0
+    assert fdr.source_class == "VENDOR"
     sink = next(p for p in cat.physical_interfaces if p.id == "tmds1204-hdmi-sink")
     assert sink.logical_protocol_id == "tmds1204"
     sby = {c.parameter: c for c in sink.constraints}