diff --git a/chip-6800/nodenames.js b/chip-6800/nodenames.js
index 9419c4e..2fda114 100644
--- a/chip-6800/nodenames.js
+++ b/chip-6800/nodenames.js
@@ -61,14 +61,14 @@ ba: 1964,      // pads: bus available
 //
 
 // internal state: Instruction Register
-ir0: 1271,
-ir1: 1269,
-ir2: 1268,
-ir3: 1267,
-ir4: 1265,
-ir5: 1264,
-ir6: 1263,
-ir7: 1261,
+ir0: 1301,
+ir1: 1285,
+ir2: 1286,
+ir3: 1287,
+ir4: 1288,
+ir5: 1289,
+ir6: 1274,
+ir7: 1277,
 
 // internal control signals
 sync: 1528,   // aka #decode_0
@@ -163,7 +163,7 @@ dbo5: 397,
 dbo6: 390,
 dbo7: 649,
 decode: 1225,
-i0: 1271,
+i0: 1271,  // pla word lines
 i1: 1269,
 i2: 1268,
 i3: 1267,
@@ -187,14 +187,6 @@ incl4: 148,
 incl5: 151,
 incl6: 152,
 incl7: 156,
-"_ir0": 1301,
-"_ir1": 1285,
-"_ir2": 1286,
-"_ir3": 1287,
-"_ir4": 1288,
-"_ir5": 1289,
-"_ir6": 1274,
-"_ir7": 1277,
 ixh0: 1910,
 ixh1: 1914,
 ixh2: 1911,