diff --git a/nemu/Kconfig b/nemu/Kconfig
index 20f7705..e4916c1 100644
--- a/nemu/Kconfig
+++ b/nemu/Kconfig
@@ -156,6 +156,11 @@ config ITRACE_BUFFER
   int "Buffer size for intruction trace (unit: number of instructions)"
   default 10
 
+config MTRACE
+  depends on TRACE && TARGET_NATIVE_ELF && ENGINE_INTERPRETER
+  bool "Enable memory tracer"
+  default n
+
 config DIFFTEST
   depends on TARGET_NATIVE_ELF
   bool "Enable differential testing"
diff --git a/nemu/src/memory/paddr.c b/nemu/src/memory/paddr.c
index ee30e70..1434f82 100644
--- a/nemu/src/memory/paddr.c
+++ b/nemu/src/memory/paddr.c
@@ -53,6 +53,7 @@ void init_mem() {
 word_t paddr_read(paddr_t addr, int len) {
   if (likely(in_pmem(addr))) return pmem_read(addr, len);
   IFDEF(CONFIG_DEVICE, return mmio_read(addr, len));
+  IFDEF(CONFIG_MTRACE, printf("R " FMT_WORD "%d\n", addr, len));
   out_of_bound(addr);
   return 0;
 }
@@ -60,5 +61,6 @@ word_t paddr_read(paddr_t addr, int len) {
 void paddr_write(paddr_t addr, int len, word_t data) {
   if (likely(in_pmem(addr))) { pmem_write(addr, len, data); return; }
   IFDEF(CONFIG_DEVICE, mmio_write(addr, len, data); return);
+  IFDEF(CONFIG_MTRACE, printf("W " FMT_WORD "%d D" FMT_WORD "\n", addr, len, data));
   out_of_bound(addr);
 }