diff --git a/lib/CPUs/MIPS/bsp/examples/dbg.c b/lib/CPUs/MIPS/bsp/examples/dbg.c
index fcde4a3..fc5a429 100644
--- a/lib/CPUs/MIPS/bsp/examples/dbg.c
+++ b/lib/CPUs/MIPS/bsp/examples/dbg.c
@@ -28,6 +28,7 @@ typedef struct _sbp_t
 	UINT32 instr;
 } bp_t;
 
+static EXCEPTION_CONTEXT xcp_last;
 static bp_t user_bp[MAX_USER_BP];
 static bp_t mgmt_bp_ss[2];
 static bp_t mgmt_bp_ru[2];
@@ -44,6 +45,18 @@ UINT32 BreakGetType(UINT32 instr)
 	return (instr >> 6) & BP_MASK_TYPE;
 }
 
+char* reg_changed(UINT32 reg1, UINT32 reg2)
+{
+	static char chg_str[2] = {0};
+
+	if (reg1 != reg2)
+		chg_str[0] = '*';
+	else
+		chg_str[0] = ' ';
+
+	return chg_str;
+}
+
 void dbg_handler(struct xcptcontext * xcp)
 {
 
@@ -53,59 +66,61 @@ void dbg_handler(struct xcptcontext * xcp)
 	UINT32 *pInstr, *pAddr_curr, *pAddr_prev, *pAddr_next;
 
 	sputs("\n");
-	PRINT_REG(" Status : ", xcp->sr);
-	PRINT_REG("  Cause : ", xcp->cr);
-	PRINT_REG("    EPC : ", xcp->epc);
-	PRINT_REG("BadAddr : ", xcp->baddr);
+	PRINT_REG_CHG(" Status : ", xcp->sr, reg_changed(xcp->sr, xcp_last.sr));
+	PRINT_REG_CHG("  Cause : ", xcp->cr, reg_changed(xcp->cr, xcp_last.cr));
+	PRINT_REG_CHG("    EPC : ", xcp->epc, reg_changed(xcp->epc, xcp_last.epc));
+	PRINT_REG_CHG("BadAddr : ", xcp->baddr, reg_changed(xcp->baddr, xcp_last.baddr));
 	sputs("\n");
-	PRINT_REG("   MDLO : ", xcp->mdlo);
-	PRINT_REG("   MDHI : ", xcp->mdhi);
+	PRINT_REG_CHG("   MDLO : ", xcp->mdlo, reg_changed(xcp->mdlo, xcp_last.mdlo));
+	PRINT_REG_CHG("   MDHI : ", xcp->mdhi, reg_changed(xcp->mdhi, xcp_last.mdhi));
 
 	sputs("\n");
 
 	sputs("Registers:\n");
-	PRINT_REG(" 0 (ze) : ", xcp->regs[0]);
-	PRINT_REG(" 1 (at) : ", xcp->regs[1]);
-	PRINT_REG(" 2 (v0) : ", xcp->regs[2]);
-	PRINT_REG(" 3 (v1) : ", xcp->regs[3]);
+	PRINT_REG_CHG(" 0 (ze) : ", xcp->regs[0], reg_changed(xcp->regs[0], xcp_last.regs[0]));
+	PRINT_REG_CHG(" 1 (at) : ", xcp->regs[1], reg_changed(xcp->regs[1], xcp_last.regs[1]));
+	PRINT_REG_CHG(" 2 (v0) : ", xcp->regs[2], reg_changed(xcp->regs[2], xcp_last.regs[2]));
+	PRINT_REG_CHG(" 3 (v1) : ", xcp->regs[3], reg_changed(xcp->regs[3], xcp_last.regs[3]));
 	sputs("\n");
-	PRINT_REG(" 4 (a0) : ", xcp->regs[4]);
-	PRINT_REG(" 5 (a1) : ", xcp->regs[5]);
-	PRINT_REG(" 6 (a2) : ", xcp->regs[6]);
-	PRINT_REG(" 7 (a3) : ", xcp->regs[7]);
+	PRINT_REG_CHG(" 4 (a0) : ", xcp->regs[4], reg_changed(xcp->regs[4], xcp_last.regs[4]));
+	PRINT_REG_CHG(" 5 (a1) : ", xcp->regs[5], reg_changed(xcp->regs[5], xcp_last.regs[5]));
+	PRINT_REG_CHG(" 6 (a2) : ", xcp->regs[6], reg_changed(xcp->regs[6], xcp_last.regs[6]));
+	PRINT_REG_CHG(" 7 (a3) : ", xcp->regs[7], reg_changed(xcp->regs[7], xcp_last.regs[7]));
 	sputs("\n");
-	PRINT_REG(" 8 (t0) : ", xcp->regs[8]);
-	PRINT_REG(" 9 (t1) : ", xcp->regs[9]);
-	PRINT_REG("10 (t2) : ", xcp->regs[10]);
-	PRINT_REG("11 (t3) : ", xcp->regs[11]);
+	PRINT_REG_CHG(" 8 (t0) : ", xcp->regs[8], reg_changed(xcp->regs[8], xcp_last.regs[8]));
+	PRINT_REG_CHG(" 9 (t1) : ", xcp->regs[9], reg_changed(xcp->regs[9], xcp_last.regs[9]));
+	PRINT_REG_CHG("10 (t2) : ", xcp->regs[10], reg_changed(xcp->regs[10], xcp_last.regs[10]));
+	PRINT_REG_CHG("11 (t3) : ", xcp->regs[11], reg_changed(xcp->regs[11], xcp_last.regs[11]));
 	sputs("\n");
-	PRINT_REG("12 (t4) : ", xcp->regs[12]);
-	PRINT_REG("13 (t5) : ", xcp->regs[13]);
-	PRINT_REG("14 (t6) : ", xcp->regs[14]);
-	PRINT_REG("15 (t7) : ", xcp->regs[15]);
+	PRINT_REG_CHG("12 (t4) : ", xcp->regs[12], reg_changed(xcp->regs[12], xcp_last.regs[12]));
+	PRINT_REG_CHG("13 (t5) : ", xcp->regs[13], reg_changed(xcp->regs[13], xcp_last.regs[13]));
+	PRINT_REG_CHG("14 (t6) : ", xcp->regs[14], reg_changed(xcp->regs[14], xcp_last.regs[14]));
+	PRINT_REG_CHG("15 (t7) : ", xcp->regs[15], reg_changed(xcp->regs[15], xcp_last.regs[15]));
 	sputs("\n");
-	PRINT_REG("16 (s0) : ", xcp->regs[16]);
-	PRINT_REG("17 (s1) : ", xcp->regs[17]);
-	PRINT_REG("18 (s2) : ", xcp->regs[18]);
-	PRINT_REG("19 (s3) : ", xcp->regs[19]);
+	PRINT_REG_CHG("16 (s0) : ", xcp->regs[16], reg_changed(xcp->regs[16], xcp_last.regs[16]));
+	PRINT_REG_CHG("17 (s1) : ", xcp->regs[17], reg_changed(xcp->regs[17], xcp_last.regs[17]));
+	PRINT_REG_CHG("18 (s2) : ", xcp->regs[18], reg_changed(xcp->regs[18], xcp_last.regs[18]));
+	PRINT_REG_CHG("19 (s3) : ", xcp->regs[19], reg_changed(xcp->regs[19], xcp_last.regs[19]));
 	sputs("\n");
-	PRINT_REG("20 (s4) : ", xcp->regs[20]);
-	PRINT_REG("21 (s5) : ", xcp->regs[21]);
-	PRINT_REG("22 (s6) : ", xcp->regs[22]);
-	PRINT_REG("23 (s7) : ", xcp->regs[23]);
+	PRINT_REG_CHG("20 (s4) : ", xcp->regs[20], reg_changed(xcp->regs[20], xcp_last.regs[20]));
+	PRINT_REG_CHG("21 (s5) : ", xcp->regs[21], reg_changed(xcp->regs[21], xcp_last.regs[21]));
+	PRINT_REG_CHG("22 (s6) : ", xcp->regs[22], reg_changed(xcp->regs[22], xcp_last.regs[22]));
+	PRINT_REG_CHG("23 (s7) : ", xcp->regs[23], reg_changed(xcp->regs[23], xcp_last.regs[23]));
 	sputs("\n");
-	PRINT_REG("24 (t8) : ", xcp->regs[24]);
-	PRINT_REG("25 (t9) : ", xcp->regs[25]);
-	PRINT_REG("26 (k0) : ", xcp->regs[26]);
-	PRINT_REG("27 (k1) : ", xcp->regs[27]);
+	PRINT_REG_CHG("24 (s8) : ", xcp->regs[24], reg_changed(xcp->regs[24], xcp_last.regs[24]));
+	PRINT_REG_CHG("25 (s9) : ", xcp->regs[25], reg_changed(xcp->regs[25], xcp_last.regs[25]));
+	PRINT_REG_CHG("26 (k0) : ", xcp->regs[26], reg_changed(xcp->regs[26], xcp_last.regs[26]));
+	PRINT_REG_CHG("27 (k1) : ", xcp->regs[27], reg_changed(xcp->regs[27], xcp_last.regs[27]));
 	sputs("\n");
-	PRINT_REG("28 (gp) : ", xcp->regs[28]);
-	PRINT_REG("29 (sp) : ", xcp->regs[29]);
-	PRINT_REG("30 (fp) : ", xcp->regs[30]);
-	PRINT_REG("31 (ra) : ", xcp->regs[31]);
+	PRINT_REG_CHG("28 (gp) : ", xcp->regs[28], reg_changed(xcp->regs[28], xcp_last.regs[28]));
+	PRINT_REG_CHG("29 (sp) : ", xcp->regs[29], reg_changed(xcp->regs[29], xcp_last.regs[29]));
+	PRINT_REG_CHG("30 (fp) : ", xcp->regs[30], reg_changed(xcp->regs[30], xcp_last.regs[30]));
+	PRINT_REG_CHG("31 (ra) : ", xcp->regs[31], reg_changed(xcp->regs[31], xcp_last.regs[31]));
 	sputs("\n");
 	sputs("\n");
 
+	memcpy(&xcp_last, xcp, sizeof(EXCEPTION_CONTEXT));
+
 	is_user_bp = 0;
 	pAddr_curr = (UINT32*)xcp->epc;
 	is_branch_shadow = ((xcp->cr & 0x80000000) == 0x80000000);
@@ -351,7 +366,7 @@ int debug_break(struct xcptcontext * xcp)
 
 void dbg_init(void)
 {
-
+	memset(&xcp_last, 0, sizeof(EXCEPTION_CONTEXT));
 	interrupt_register(2, debug_int);
 	interrupt_enable(2);
 
diff --git a/lib/CPUs/MIPS/bsp/examples/xcpt.h b/lib/CPUs/MIPS/bsp/examples/xcpt.h
index 7ffde6e..7958912 100644
--- a/lib/CPUs/MIPS/bsp/examples/xcpt.h
+++ b/lib/CPUs/MIPS/bsp/examples/xcpt.h
@@ -42,6 +42,12 @@ typedef int (*fp_xcpt_t)(struct xcptcontext * xcp);
 			sputs("   ");
 
 
+#define PRINT_REG_CHG(tag_str, reg, chg_tag)			\
+			sputs(tag_str);				\
+			print_word(reg);			\
+			sputs(chg_tag);				\
+			sputs("  ");
+
 
 // Public functions
 void xcpt_register(int xcpt_num, fp_xcpt_t fp);