From 53d7c5d7abdc3460ccfda9ba57f1f36c05923097 Mon Sep 17 00:00:00 2001
From: Neil Webber <neil@webber.com>
Date: Wed, 8 May 2024 08:40:13 -0500
Subject: [PATCH] Fix for typeerror #21 -- though this also points out
 re-reading what MMR2 points to (for logging) might be a bad idea

---
 machine.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/machine.py b/machine.py
index dbddd52..4adb9f9 100644
--- a/machine.py
+++ b/machine.py
@@ -1043,7 +1043,13 @@ class PDP1170(PDP11):
         # everything into an octal string.
         if fmt is oct:
             for k, v in d.items():
-                pfx = '0' if v > 7 else ''
-                d[k] = pfx + oct(v)[2:]
+                try:
+                    pfx = '0' if v > 7 else ''
+                except TypeError:
+                    # Leave non-numeric values unmolested.
+                    # E.g., the "except PDPTrap" case for MMR2 reads
+                    pass
+                else:
+                    d[k] = pfx + oct(v)[2:]
 
         return d