diff --git a/btester.sh b/btester.sh
deleted file mode 100755
index a956a7e..0000000
--- a/btester.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#! /bin/sh
-
-pdpy11 --lst tester.mac
-
-if [ ! -e raw_to_simh_bin ] ; then
-	g++ -Ofast raw_to_simh_bin.cpp -o raw_to_simh_bin
-fi
-
-./raw_to_simh_bin tester 512 512 tester.bin
-
-ls -la tester*
diff --git a/bus.cpp b/bus.cpp
index c26e2e5..a645365 100644
--- a/bus.cpp
+++ b/bus.cpp
@@ -407,7 +407,6 @@ uint16_t bus::read(const uint16_t addr_in, const word_mode_t word_mode, const rm
 			DOLOG(debug, true, "READ-I/O UNHANDLED read %08o (%c), (base: %o)", m_offset, word_mode ? 'B' : ' ', get_io_base());
 
 			c->trap(004);  // no such i/o
-
 			throw 1;
 		}
 
@@ -422,6 +421,11 @@ uint16_t bus::read(const uint16_t addr_in, const word_mode_t word_mode, const rm
 	}
 
 	if (m_offset >= n_pages * 8192) {
+		if (peek_only) {
+			DOLOG(debug, true, "READ from %06o - out of range!", addr_in);
+			return 0;
+		}
+
 		c->trap(004);  // no such RAM
 		throw 1;
 	}
diff --git a/debugger.cpp b/debugger.cpp
index d6c0b4b..14d1e24 100644
--- a/debugger.cpp
+++ b/debugger.cpp
@@ -563,6 +563,9 @@ void debugger(console *const cnsl, bus *const b, std::atomic_uint32_t *const sto
 		catch(const std::exception & e) {
 			cnsl->put_string_lf(format("Exception caught: %s", e.what()));
 		}
+		catch(const int ei) {
+			cnsl->put_string_lf(format("Problem: %d", ei));
+		}
 		catch(...) {
 			cnsl->put_string_lf("Unspecified exception caught");
 		}