diff --git a/bin/debugger.cpp b/bin/debugger.cpp
index 91016aa..7c18797 100644
--- a/bin/debugger.cpp
+++ b/bin/debugger.cpp
@@ -46,7 +46,7 @@ namespace {
 	AddressMap wbrkMap; // write breaks.
 	ToolMap tbrkMap; // tool breaks.
 
-	std::unordered_map<std::string, uint16_t> toolMap;
+	std::unordered_map<std::string, uint32_t> envMap;
 
 
 	void hexdump(const uint8_t *data, ssize_t size, uint32_t address = 0)
@@ -760,19 +760,13 @@ void SetXRegister(unsigned reg, uint32_t value)
 }
 
 
-uint16_t TrapNumber(const std::string &s)
+uint32_t EnvLookup(const std::string &s)
 {
-	auto iter = toolMap.find(s);
-	if (iter == toolMap.end()) return 0;
+	auto iter = envMap.find(s);
+	if (iter == envMap.end()) return 0;
 	return iter->second;
 }
 
-uint16_t TrapNumber(const char *cp)
-{
-	if (!cp || !*cp) return 0;
-	std::string s(cp);
-	return TrapNumber(s);
-}
 
 
 // TODO -- RUN command - reload, re-initialize, re-execute
@@ -783,12 +777,7 @@ void Shell()
 
 	add_history("!Andy, it still has history!");
 
-	{
-		// load the tool trap file.
-		std::string path = MPW::RootDir();
-		path += "/Traps.text";
-		toolMap = LoadTrapFile(path);
-	}
+	envMap = LoadTrapFile(MPW::RootDirPathForFile("Traps.text"));
 
 	// start it up
 	printf("MPW Debugger shell\n\n");
diff --git a/bin/debugger.h b/bin/debugger.h
index 06852bc..06e9528 100644
--- a/bin/debugger.h
+++ b/bin/debugger.h
@@ -28,10 +28,9 @@ struct Command {
 
 bool ParseLine(const char *iter, Command *command);
 
-std::unordered_map<std::string, uint16_t> LoadTrapFile(const std::string &path);
+std::unordered_map<std::string, uint32_t> LoadTrapFile(const std::string &path);
 
-uint16_t TrapNumber(const std::string &);
-uint16_t TrapNumber(const char *);
+uint32_t EnvLookup(const std::string &);
 
 
 void Shell();
diff --git a/mpw/mpw.cpp b/mpw/mpw.cpp
index c66b37a..3858642 100644
--- a/mpw/mpw.cpp
+++ b/mpw/mpw.cpp
@@ -100,6 +100,15 @@ namespace MPW
 		return S_ISDIR(st.st_mode);
 	}
 
+	std::string RootDirPathForFile(const std::string &file)
+	{
+		std::string dir(RootDir());
+		if (dir.length() && dir.back() != '/') dir.push_back('/');
+		dir.append(file);
+
+		return dir;
+	}
+
 	const std::string RootDir()
 	{
 		static bool initialized = false;
@@ -305,10 +314,8 @@ namespace MPW
 
 				void LoadEnvironment(std::string &envfile, std::unordered_map<std::string, std::string> &env);
 
-				if (m.back() != '/') m.push_back('/');
-				m.append("Environment");
-
-				LoadEnvironment(m, env);
+				std::string path(RootDirPathForFile("Environment.text"));
+				LoadEnvironment(path, env);
 			}
 
 			std::deque<std::string> e;
diff --git a/mpw/mpw.h b/mpw/mpw.h
index 5a56611..9335c02 100644
--- a/mpw/mpw.h
+++ b/mpw/mpw.h
@@ -93,6 +93,7 @@ namespace MPW {
 
 
 	const std::string RootDir();
+	std::string RootDirPathForFile(const std::string &file);
 
 	// should add argc/argv/envp...
 	uint16_t Init(int argc, char **argv);