diff --git a/nodenames.js b/nodenames.js
index e5069c8..2d6de58 100644
--- a/nodenames.js
+++ b/nodenames.js
@@ -598,6 +598,35 @@ alub5: 1678,
 alub6: 235,
 alub7: 1535,
 
+// alu carry chain and decimal mode
+C01: 1285,
+C12: 505,
+C23: 1023,
+C34: 78,
+C45: 142,
+C56: 500,
+C67: 1314,
+C78: 808,
+"C78.phi2": 560,
+DC34: 1372,
+DC78: 333,
+"#C01": 1506,
+"#C12": 1122,
+"#C23": 1003,
+"#C34": 1425,
+"#C45": 1571,
+"#C56": 427,
+"#C67": 592,
+"#C78": 1327,
+"DA-C01": 623,
+"DA-AB2": 216,
+"DA-AxB2": 516,
+"DA-C45": 1144,
+"#DA-ADD1": 901,
+"#DA-ADD2": 699,
+
+// misc alu internals
+
 aluanorb0: 143,
 aluanandb0: 1628,
 aluaorb0: 693,