diff --git a/bus.cpp b/bus.cpp
index 14d53d3..9e1b73c 100644
--- a/bus.cpp
+++ b/bus.cpp
@@ -195,6 +195,13 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev,
 				DOLOG(debug, !peek_only, "readb stack limit register");
 				return c -> getStackLimitRegister() >> 8;
 			}
+
+			if (a == ADDR_MICROPROG_BREAK_REG) {  // microprogram break register
+				return microprogram_break_register & 255;
+			}
+			if (a == ADDR_MICROPROG_BREAK_REG + 1) {  // microprogram break register
+				return microprogram_break_register >> 8;
+			}
 		}
 		else {
 			if (a == ADDR_MMR0) {
@@ -230,6 +237,10 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev,
 				DOLOG(debug, !peek_only, "read CPUERR");
 				return CPUERR;
 			}
+
+			if (a == ADDR_MICROPROG_BREAK_REG) {  // microprogram break register
+				return microprogram_break_register;
+			}
 		}
 
 		if (tm11 && a >= TM_11_BASE && a < TM_11_END)