diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e1e148a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,21 @@
+OBJS=emul.o emul_mem.o emul_reg.o emul_io_std.o emul_io_file.o
+CC=gcc
+
+emulcomp: $(OBJS)
+	$(CC) $(OBJS) -o emulcomp
+
+emul.o: emul.c
+	$(CC) -c emul.c
+
+emul_mem.o: emul_mem.c
+	$(CC) -c emul_mem.c
+emul_reg.o: emul_reg.c
+	$(CC) -c emul_reg.c
+
+emul_io_std.o: emul_io_std.c
+	$(CC) -c emul_io_std.c
+emul_io_file.o: emul_io_file.c
+	$(CC) -c emul_io_file.c
+
+clean:
+	rm -f $(OBJS)
diff --git a/emul.c b/emul.c
new file mode 100644
index 0000000..49eee05
--- /dev/null
+++ b/emul.c
@@ -0,0 +1,15 @@
+#include "emul_reg.h"
+#include "emul_mem.h"
+#include "emul_io_std.h"
+
+int main(void) {
+    emul_reg_init();
+    emul_open_file("test.txt", "w+");
+    emul_out_file('a');
+    emul_out_file('a');
+    emul_out_file('a');
+    emul_out_file('a');
+    emul_out_file('a');
+    emul_out_file('a');
+    emul_close_file();
+}
diff --git a/emul.o b/emul.o
new file mode 100644
index 0000000..7c3e101
--- /dev/null
+++ b/emul.o
Binary files differ
diff --git a/emul_inst.c b/emul_inst.c
new file mode 100644
index 0000000..7825381
--- /dev/null
+++ b/emul_inst.c
@@ -0,0 +1 @@
+#include "emul_inst.h"
diff --git a/emul_inst.h b/emul_inst.h
new file mode 100644
index 0000000..9609874
--- /dev/null
+++ b/emul_inst.h
@@ -0,0 +1,6 @@
+#ifndef EMUL_INST__
+#define EMUL_INST__
+
+
+
+#endif
diff --git a/emul_inst_decipher.c b/emul_inst_decipher.c
new file mode 100644
index 0000000..5b238d6
--- /dev/null
+++ b/emul_inst_decipher.c
@@ -0,0 +1,63 @@
+#include "emul_inst_decipher.h"
+#include <stdio.h>
+
+/*
+typedef struct {
+    int opecode;
+    int string;
+} emul_isa_t;
+*/
+
+emul_isa_t isa_dict[] {
+    { ADD, "add" },
+    { ADDI, "addi" },
+    { SUB, "sub" },
+
+    { SLT, "slt" },
+    { SLTI, "slti" },
+    { SEQ, "seq" },
+    { SGE, "sge" },
+    { SGT, "sgt" },
+    { SLE, "sle"},
+    { SNE, "sne" },
+
+    { B, "b"},
+    { BEQ, "beq" },
+    { BNE, "bne" },
+    { J, "j" },
+
+    { LW, "lw" },
+
+    { SW, "sw" },
+
+    { MOVE, "move" }
+};
+
+FILE *fp;
+
+void emul_inst_dec_init() {
+}
+
+void emul_inst_dec_load(char *filename) {
+    if ((fp = open(filename_cache, "r")) == NULL) {
+	fprintf(stderr, "%s is can not open", filename);
+    }
+}
+void emul_inst_dec_close() {
+    fclose(fp);
+}
+
+// Example:
+//   ASM: add St0, Ss0, Ss1
+//   RETURN: add
+int emul_inst_dec_get_opecode() {
+
+}
+
+// Example:
+//   ASM: add St0, Ss0, Ss1
+//   RETURN: St0
+//   RETURN: Ss0
+//   RETURN: Ss1
+int emul_inst_dec_get_operand() {
+}
diff --git a/emul_inst_decipher.h b/emul_inst_decipher.h
new file mode 100644
index 0000000..d34621d
--- /dev/null
+++ b/emul_inst_decipher.h
@@ -0,0 +1,30 @@
+#ifndef EMUL_INST_DECIPHER__
+#ifndef EMUL_INST_DECIPHER__
+
+#include "emul_inst_isa.h"
+#include "emul_io_file"
+
+typedef struct {
+    int opecode;
+    int string;
+} emul_isa_t;
+
+void emul_inst_dec_init();
+
+void emul_inst_dec_load(char *filename);
+
+void emul_inst_dec_close();
+
+// Example:
+//   ASM: add St0, Ss0, Ss1
+//   RETURN: add
+int emul_inst_dec_get_opecode();
+
+// Example:
+//   ASM: add St0, Ss0, Ss1
+//   RETURN: St0
+//   RETURN: Ss0
+//   RETURN: Ss1
+int emul_inst_dec_get_operand();
+
+#endif
diff --git a/emul_inst_isa.h b/emul_inst_isa.h
new file mode 100644
index 0000000..3bd115b
--- /dev/null
+++ b/emul_inst_isa.h
@@ -0,0 +1,102 @@
+#ifndef EMUL_INST_ISA__
+#define EMUL_INST_ISA__
+
+enum EMUL_ISA {
+    ADD,
+    ADDI,
+    AND,
+    ANDI,
+    CLO,
+    CLZ,
+    DIV,
+    MULT,
+    MUL,
+    MULO,
+    MADD,
+    MSUB,
+    NEG,
+    NOR,
+    NOT,
+    OR,
+    ORI,
+    REM,
+    SLL,
+    SLLV,
+    SRA,
+    SRAV,
+    SRL,
+    SRLV,
+    ROL,
+    ROR,
+    SUB,
+    XOR,
+    XORI,
+
+    LUI,
+    LI,
+
+    SLT,
+    SLTI,
+    SEQ,
+    SGE,
+    SGT,
+    SLE,
+    SNE,
+
+    B,
+    BEQ,
+    BGEZ,
+    BGEZAL,
+    BGTZ,
+    BLEZ,
+    BLTZAL,
+    BLTZ,
+    BNE,
+    BEQZ,
+    BGE,
+    BGT,
+    BLE,
+    BLT,
+    BNEZ,
+
+    J,
+    JAL,
+    JALR,
+    JR,
+
+    LA,
+    LB,
+    LH,
+    LW,
+    LWL,
+    LWR,
+    LD,
+    ULH,
+    ULW,
+    LL,
+
+    SB,
+    SH,
+    SW,
+    SWL,
+    SWR,
+    SD,
+    USH,
+    USW,
+    SC,
+
+    MOVE,
+    MFHI,
+    MFLO,
+    MTHI,
+    MTLO,
+    MOVN,
+    MOVZ,
+
+    SYSCALL,
+    BREAK,
+    NOP
+}
+
+#endif
+
diff --git a/emul_io.h b/emul_io.h
new file mode 100644
index 0000000..38f291b
--- /dev/null
+++ b/emul_io.h
@@ -0,0 +1,7 @@
+#ifndef EMUL_IO__
+#define EMUL_IO__
+
+#include "emul_io_std.h"
+#include "emul_io_file.h"
+
+#endif
diff --git a/emul_io_file.c b/emul_io_file.c
new file mode 100644
index 0000000..d13214b
--- /dev/null
+++ b/emul_io_file.c
@@ -0,0 +1,21 @@
+#include "emul_io_file.h"
+
+FILE *fp;
+
+void emul_out_file(char c) {
+    fputc(c, fp);
+}
+
+char emul_cin_file() {
+    return fgetc(fp);
+}
+
+void emul_open_file(char *filename, char *mode) {
+    if ((fp = fopen(filename, mode)) == NULL) {
+	fprintf(stderr, "File open failed: %s\n", filename);
+    }
+}
+
+void emul_close_file() {
+    fclose(fp);
+}
diff --git a/emul_io_file.h b/emul_io_file.h
new file mode 100644
index 0000000..3f0fe2e
--- /dev/null
+++ b/emul_io_file.h
@@ -0,0 +1,15 @@
+#ifndef EMUL_IO_FILE__
+#define EMUL_IO_FILE__
+
+#include <stdio.h>
+
+void emul_out_file(char);
+
+char emul_cin_file();
+
+void emul_open_file(char*, char*);
+
+/* this must be closed when closed application */
+void emul_close_file();
+
+#endif
diff --git a/emul_io_file.o b/emul_io_file.o
new file mode 100644
index 0000000..ea7568d
--- /dev/null
+++ b/emul_io_file.o
Binary files differ
diff --git a/emul_io_std.c b/emul_io_std.c
new file mode 100644
index 0000000..83914c1
--- /dev/null
+++ b/emul_io_std.c
@@ -0,0 +1,9 @@
+#include "emul_io_std.h"
+
+void emul_out_std(char c) {
+    putchar(c);
+}
+
+char emul_cin_std() {
+    return getchar();
+}
diff --git a/emul_io_std.h b/emul_io_std.h
new file mode 100644
index 0000000..fff1897
--- /dev/null
+++ b/emul_io_std.h
@@ -0,0 +1,10 @@
+#ifndef EMUL_IO_STD__
+#define EMUL_IO_STD__
+
+#include <stdio.h>
+
+void emul_out_std(char c);
+
+char emul_cin_std();
+
+#endif
diff --git a/emul_io_std.o b/emul_io_std.o
new file mode 100644
index 0000000..8eac8f8
--- /dev/null
+++ b/emul_io_std.o
Binary files differ
diff --git a/emul_mem.c b/emul_mem.c
new file mode 100644
index 0000000..fb1d4c2
--- /dev/null
+++ b/emul_mem.c
@@ -0,0 +1 @@
+#include "emul_mem.h"
diff --git a/emul_mem.h b/emul_mem.h
new file mode 100644
index 0000000..8c2a1cf
--- /dev/null
+++ b/emul_mem.h
@@ -0,0 +1,8 @@
+#ifndef EMUL_MEM__
+#define EMUL_MEM__
+
+#define EMUL_MEMSIZE 1024
+
+char mem[EMUL_MEMSIZE];
+
+#endif
diff --git a/emul_mem.o b/emul_mem.o
new file mode 100644
index 0000000..587d549
--- /dev/null
+++ b/emul_mem.o
Binary files differ
diff --git a/emul_reg.c b/emul_reg.c
new file mode 100644
index 0000000..79d4ca9
--- /dev/null
+++ b/emul_reg.c
@@ -0,0 +1,5 @@
+#include "emul_reg.h"
+
+void emul_reg_init() {
+    reg[Szero] = 0;
+}
diff --git a/emul_reg.h b/emul_reg.h
new file mode 100644
index 0000000..5967c93
--- /dev/null
+++ b/emul_reg.h
@@ -0,0 +1,52 @@
+#ifndef EMUL_REG__
+#define EMUL_REG__
+
+#define Szero 0	// Zero register
+
+#define Sat 1	// using asem
+
+#define Sv0 2	// return
+#define Sv1 3
+
+#define Sa0 4	// argment
+#define Sa1 5
+#define Sa2 6
+#define Sa3 7
+
+#define St0 8	// temp
+#define St1 9
+#define St2 10
+#define St3 11
+#define St4 12
+#define St5 13
+#define St6 14
+#define St7 15
+
+#define Ss0 16	// var
+#define Ss1 17
+#define Ss2 18
+#define Ss3 19
+#define Ss4 20
+#define Ss5 21
+#define Ss6 22
+#define Ss7 23
+
+#define Sk0 26	// kernel
+#define Sk1 27
+
+#define Sgp 28	// grobal
+
+#define Ssp 29	// stack
+
+#define Sfp 30	// frame
+
+#define Sra 31	// return address
+
+
+int reg[32];
+
+/* initialize register 
+ * this must be called */
+void emul_reg_init();
+
+#endif
diff --git a/emul_reg.o b/emul_reg.o
new file mode 100644
index 0000000..afc48ff
--- /dev/null
+++ b/emul_reg.o
Binary files differ
diff --git a/emulcomp b/emulcomp
new file mode 100755
index 0000000..d6256a6
--- /dev/null
+++ b/emulcomp
Binary files differ
diff --git "a/resorce/2015\345\271\264\345\272\246 \343\202\267\343\202\271\343\203\206\343\203\240\343\203\227\343\203\255\343\202\260\343\203\251\343\203\237\343\203\263\343\202\260.desktop" "b/resorce/2015\345\271\264\345\272\246 \343\202\267\343\202\271\343\203\206\343\203\240\343\203\227\343\203\255\343\202\260\343\203\251\343\203\237\343\203\263\343\202\260.desktop"
new file mode 100644
index 0000000..04b4dd5
--- /dev/null
+++ "b/resorce/2015\345\271\264\345\272\246 \343\202\267\343\202\271\343\203\206\343\203\240\343\203\227\343\203\255\343\202\260\343\203\251\343\203\237\343\203\263\343\202\260.desktop"
@@ -0,0 +1,6 @@
+[Desktop Entry]
+Encoding=UTF-8
+Name=2015年度 システムプログラミングへのリンク
+Type=Link
+URL=http://www.swlab.cs.okayama-u.ac.jp/~nom/lect/p3/index.html#orgheadline4
+Icon=text-html
diff --git "a/resorce/MIPS\343\202\242\343\203\274\343\202\255\343\203\206\343\202\257\343\203\201\343\203\243 - Wikipedia.desktop" "b/resorce/MIPS\343\202\242\343\203\274\343\202\255\343\203\206\343\202\257\343\203\201\343\203\243 - Wikipedia.desktop"
new file mode 100644
index 0000000..1334599
--- /dev/null
+++ "b/resorce/MIPS\343\202\242\343\203\274\343\202\255\343\203\206\343\202\257\343\203\201\343\203\243 - Wikipedia.desktop"
@@ -0,0 +1,6 @@
+[Desktop Entry]
+Encoding=UTF-8
+Name=MIPSアーキテクチャ - Wikipediaへのリンク
+Type=Link
+URL=https://ja.wikipedia.org/wiki/MIPS%E3%82%A2%E3%83%BC%E3%82%AD%E3%83%86%E3%82%AF%E3%83%81%E3%83%A3#MIPS_I_.E3.81.AE.E5.91.BD.E4.BB.A4.E5.BD.A2.E5.BC.8F
+Icon=text-html
diff --git "a/resorce/\346\274\224\347\277\222\343\201\247\344\275\277\347\224\250\343\201\231\343\202\213\344\270\273\343\201\252 MIPS \345\221\275\344\273\244 - 2015\345\271\264\345\272\246 \343\202\267\343\202\271\343\203\206\343\203\240\343\203\227\343\203\255\343\202\260\343\203\251\343\203\237\343\203\263\343\202\260.desktop" "b/resorce/\346\274\224\347\277\222\343\201\247\344\275\277\347\224\250\343\201\231\343\202\213\344\270\273\343\201\252 MIPS \345\221\275\344\273\244 - 2015\345\271\264\345\272\246 \343\202\267\343\202\271\343\203\206\343\203\240\343\203\227\343\203\255\343\202\260\343\203\251\343\203\237\343\203\263\343\202\260.desktop"
new file mode 100644
index 0000000..b4b564f
--- /dev/null
+++ "b/resorce/\346\274\224\347\277\222\343\201\247\344\275\277\347\224\250\343\201\231\343\202\213\344\270\273\343\201\252 MIPS \345\221\275\344\273\244 - 2015\345\271\264\345\272\246 \343\202\267\343\202\271\343\203\206\343\203\240\343\203\227\343\203\255\343\202\260\343\203\251\343\203\237\343\203\263\343\202\260.desktop"
@@ -0,0 +1,6 @@
+[Desktop Entry]
+Encoding=UTF-8
+Name=演習で使用する主な MIPS 命令 - 2015年度 システムプログラミングへのリンク
+Type=Link
+URL=http://www.swlab.cs.okayama-u.ac.jp/~nom/lect/p3/concise-mips-instruction-set.html
+Icon=text-html