diff --git a/.debugusrc1.js b/.debugusrc1.js
index 90e6e68..3cc9ffe 100644
--- a/.debugusrc1.js
+++ b/.debugusrc1.js
@@ -11,6 +11,7 @@ print_pid();
 print_program_load_offset();
 mk_brk_addr(main_offset);
 list_brks();
+
 log_inf("1 --------------------------------------------");
 dump_regs();
 var r14 = get_reg("r14");
@@ -20,4 +21,12 @@ dump_regs();
 set_reg("r14", r14);
 log_inf("3 --------------------------------------------");
 dump_regs();
+
+var r14_mem = mem_read(get_reg("r14"));
+log_inf("Memory at r14 " + r14_mem);
+mem_write(get_reg("r14"), "0x696969");
+log_inf("Memory at r14 " + mem_read(get_reg("r14")));
+mem_write(get_reg("r14"), r14_mem);
+log_inf("Memory at r14 " + mem_read(get_reg("r14")));
+
 cont();
diff --git a/debugus.c b/debugus.c
index 8b35a9e..d00cd8f 100644
--- a/debugus.c
+++ b/debugus.c
@@ -26,6 +26,8 @@
 
 #define INIT_SCRIPT ".debugusrc.js"
 
+// Registers
+
 typedef enum {
     rax,
     rbx,
@@ -139,6 +141,18 @@ Register get_reg_from_name(const char *name)
     }
 }
 
+// Memory
+
+uint64_t mem_read(pid_t pid, uint64_t addr)
+{
+    return ptrace(PTRACE_PEEKDATA, pid, addr, NULL);
+}
+
+void mem_write(pid_t pid, uint64_t addr, uint64_t v)
+{
+    ptrace(PTRACE_POKEDATA, pid, addr, v);
+}
+
 // How breakpoints work?
 // We can enable/disable breakpoints by putting/removing an int 3 instruction
 // into/from the executed program. int 3 will trigger a SIGTRAP, which we can
@@ -316,6 +330,31 @@ void dbg_js_set_reg(js_State *js)
     js_pushundefined(js);
 }
 
+void dbg_js_mem_read(js_State *js)
+{
+    Dbg *dbg = getdbg();
+    const char *addr_str = js_tostring(js, 1);
+    uintptr_t addr;
+    sscanf(addr_str, "0x%"SCNxPTR, &addr);
+    uint64_t v = mem_read(dbg->pid, addr);
+    char buf[20];
+    snprintf(buf, sizeof(buf), "0x%"PRIx64, v);
+    js_pushstring(js, buf);
+}
+
+void dbg_js_mem_write(js_State *js)
+{
+    Dbg *dbg = getdbg();
+    const char *addr_str = js_tostring(js, 1);
+    uintptr_t addr;
+    sscanf(addr_str, "0x%"SCNxPTR, &addr);
+    const char *value_str = js_tostring(js, 2);
+    uint64_t value;
+    sscanf(value_str, "0x%"SCNx64, &value);
+    mem_write(dbg->pid, addr, value);
+    js_pushundefined(js);
+}
+
 void dbg_init_js(Dbg *dbg)
 {
     dbg->js   = js_newstate(NULL, NULL, JS_STRICT);
@@ -339,6 +378,8 @@ void dbg_init_js(Dbg *dbg)
     make_js_func(get_program_load_offset, 0);
     make_js_func(get_reg, 1 /*reg name*/);
     make_js_func(set_reg, 2 /* reg name, value*/);
+    make_js_func(mem_read, 1 /*addr*/);
+    make_js_func(mem_write, 2 /*addr, value*/);
 
     #undef make_js_func
 }