diff --git a/emul_inst_exec.c b/emul_inst_exec.c
index c4e9a84..83b6385 100644
--- a/emul_inst_exec.c
+++ b/emul_inst_exec.c
@@ -289,7 +289,7 @@
 /* :OUTPUT <REGISTER>
 *   レジスタの値をASCII文字として画面に出力する,改行はない*/
 void emul_inst_exec_pseudo_output(int reg) {
-    emul_out_std("%d", (char)emul_reg_get(reg));
+    emul_out_std("%c", (char)emul_reg_get(reg));
 }
 
 /* :CRLF
diff --git a/emul_mem.c b/emul_mem.c
index 8ec7cf5..e3145dc 100644
--- a/emul_mem.c
+++ b/emul_mem.c
@@ -15,16 +15,16 @@
 
 int emul_mem_get_word(int address) {
     int word = 0;
-    word |= (0x000F&mem[address+0]) << 0;
-    word |= (0x000F&mem[address+1]) << 8;
-    word |= (0x000F&mem[address+2]) << 16;
-    word |= (0x000F&mem[address+3]) << 24;
+    word |= (0x00FF&mem[address+0]) << 0;
+    word |= (0x00FF&mem[address+1]) << 8;
+    word |= (0x00FF&mem[address+2]) << 16;
+    word |= (0x00FF&mem[address+3]) << 24;
     return word;
 }
 
 void emul_mem_set_word(int address, int word) {
-    mem[address+0] = (char)((word >> 0 ) & 0x000F);
-    mem[address+1] = (char)((word >> 8 ) & 0x000F);
-    mem[address+2] = (char)((word >> 16) & 0x000F);
-    mem[address+3] = (char)((word >> 24) & 0x000F);
+    mem[address+0] = (char)((word >> 0 ) & 0x00FF);
+    mem[address+1] = (char)((word >> 8 ) & 0x00FF);
+    mem[address+2] = (char)((word >> 16) & 0x00FF);
+    mem[address+3] = (char)((word >> 24) & 0x00FF);
 }