From 39ac76aa4fe5299fb898a8c1266f9a7a03200049 Mon Sep 17 00:00:00 2001
From: Loic Nageleisen <loic.nageleisen@gmail.com>
Date: Mon, 9 Apr 2012 15:32:14 +0200
Subject: [PATCH] exception isolation

---
 dcpu_16.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dcpu_16.py b/dcpu_16.py
index 92f6102..48402d7 100644
--- a/dcpu_16.py
+++ b/dcpu_16.py
@@ -378,10 +378,11 @@ class CPU(object):
             op = _opcode_map[opcode]
             try:
                 op = op[a_code]
-                args = (c._pointer(b_code),)
             except TypeError:
                 args = (c._pointer(a_code),
                         c._pointer(b_code))
+            else:
+                args = (c._pointer(b_code),)
         except KeyError:
             raise Exception('Invalid opcode %s at PC=%04X' % (["%02X"%x for x in opcode], c.pc))
         return op, args