diff --git a/src/Ophis/Opcodes.py b/src/Ophis/Opcodes.py
index f99f53c..d3884db 100644
--- a/src/Ophis/Opcodes.py
+++ b/src/Ophis/Opcodes.py
@@ -335,10 +335,16 @@ c02extensions = {
                          None, None, None, None, None, None, None],
                  'stz': [None, None, 0x64, 0x74, None, 0x9C, 0x9E, None,
                          None, None, None, None, None, None, None],
+                 'stz.w': [None, None, None, None, None, 0x9C, 0x9E, None,
+                           None, None, None, None, None, None, None],
                  'trb': [None, None, 0x14, None, None, 0x1C, None, None,
                          None, None, None, None, None, None, None],
+                 'trb.w': [None, None, None, None, None, 0x1C, None, None,
+                           None, None, None, None, None, None, None],
                  'tsb': [None, None, 0x04, None, None, 0x0C, None, None,
                          None, None, None, None, None, None, None],
+                 'tsb.w': [None, None, None, None, None, 0x0C, None, None,
+                           None, None, None, None, None, None, None],
                  'wai': [0xCB, None, None, None, None, None, None, None,
                          None, None, None, None, None, None, None],
                 }
diff --git a/tools/opcodes/op65c02.txt b/tools/opcodes/op65c02.txt
index 9072f27..ef1eb25 100644
--- a/tools/opcodes/op65c02.txt
+++ b/tools/opcodes/op65c02.txt
@@ -10,7 +10,7 @@
   09: ORA - Immediate
   0A: ASL - Implied
   0B:
-  0C: TSB - Absolute
+  0C: TSB - Absolute; TSB.W - Absolute
   0D: ORA - Absolute
   0E: ASL - Absolute
   0F: BBR0 - Relative
@@ -26,7 +26,7 @@
   19: ORA - Absolute, Y
   1A: INA - Implied; INC - Implied
   1B:
-  1C: TRB - Absolute
+  1C: TRB - Absolute; TRB.W - Absolute
   1D: ORA - Absolute, X
   1E: ASL - Absolute, X
   1F: BBR1 - Relative
@@ -154,9 +154,9 @@
   99: STA - Absolute, Y
   9A: TXS - Implied
   9B:
-  9C: STZ - Absolute
+  9C: STZ - Absolute; STZ.W - Absolute
   9D: STA - Absolute, X
-  9E: STZ - Absolute, X
+  9E: STZ - Absolute, X; STZ.W - Absolute, X
   9F: BBS1 - Relative
   A0: LDY - Immediate
   A1: LDA - (Zero Page, X)