diff --git a/libs/master.lib/egc_shift_left_all.asm b/libs/master.lib/egc_shift_left_all.asm
new file mode 100644
index 00000000..f17a860f
--- /dev/null
+++ b/libs/master.lib/egc_shift_left_all.asm
@@ -0,0 +1,119 @@
+; master library - 
+;
+; Description:
+;	EGCによる左スクロール
+;
+; Functions/Procedures:
+;	void egc_shift_left_all(int dots);
+;
+; Parameters:
+;	dots
+;
+; Returns:
+;	none
+;
+; Binding Target:
+;	Microsoft-C / Turbo-C / Turbo Pascal
+;
+; Running Target:
+;	PC-9801VX
+;
+; Requiring Resources:
+;	CPU: 186
+;	EGC
+;
+; Notes:
+;	
+;
+; Assembly Language Note:
+;	
+;
+; Compiler/Assembler:
+;	TASM 3.0
+;	OPTASM 1.6
+;
+; Author:
+;	Kazumi
+;
+; Revision History:
+;$Id: lshifta.asm 0.04 92/05/28 22:57:03 Kazumi Rel $
+;	94/ 5/16 Initial: egcsftla.asm/master.lib 0.23
+;
+
+func EGC_SHIFT_LEFT_ALL	; egc_shift_left_all() {
+	push	BP
+	mov	BP,SP
+	push	DS
+	push	SI
+	push	DI
+
+	x	= (RETSIZE+1)*2
+
+	mov	BX,[BP+x]
+	mov	AL,00000111b		; RegWriteEnable
+	out	6ah,AL
+	mov	AL,80h			; CGmode = 1
+	out	7ch,AL
+	mov	AL,05h			; ExBit = 1
+	out	6ah,AL
+	mov	DX,04a0h
+	mov	AX,0fff0h		; アクティブプレーン
+	out	DX,AX
+	mov	DX,04a2h
+	mov	AX,00ffh		; FGC/BGC/リードプレーン
+	out	DX,AX
+	mov	DX,04a4h
+	mov	AX,28f0h		; モードレジスタ/ROPコードレジスタ
+	out	DX,AX
+	mov	DX,04a8h
+	mov	AX,0ffffh		; マスクレジスタ
+	out	DX,AX
+	mov	DX,04ach
+	mov	AX,BX			; dir/Bitアドレス
+	and	AX,000fh
+	out	DX,AX
+	mov	DX,04aeh
+	mov	AX,639
+	sub	AX,BX			; ビット長
+	out	DX,AX
+	cld
+	mov	AX,0a800h
+	mov	DS,AX
+	mov	ES,AX
+	mov	SI,0000h
+	mov	DI,0fffeh
+	mov	AX,BX
+	shr	BX,4
+	mov	BP,41
+	sub	BP,BX
+	shl	BX,1
+	dec	AX			; 94/05/13 dots が 16 の倍数のとき
+	shr	AX,4
+	shl	AX,1
+	add	SI,AX
+	mov	DX,2
+	sub	DX,BX
+	mov	BX,400
+	EVEN
+@@next_line:	mov	CX,BP
+	rep	movsw
+	sub	SI,DX
+	sub	DI,DX
+	dec	BX
+	jne	@@next_line
+	mov	DX,04a0h
+	mov	AX,0fff0h
+	out	DX,AX
+	mov	AL,04h			; ExBit = 0
+	out	6ah,AL
+	mov	AL,00h			; GRCG stop
+	out	7ch,AL
+	mov	AL,00000110b		; RegWriteDIsable
+	out	6ah,AL
+
+	pop	DI
+	pop	SI
+	pop	DS
+	pop	BP
+	ret	1*2
+endfunc			; }
diff --git a/th03_op.asm b/th03_op.asm
index 62ff2158..2e37ea72 100644
--- a/th03_op.asm
+++ b/th03_op.asm
@@ -45,100 +45,7 @@ include libs/master.lib/dos_keyclear.asm
 include libs/master.lib/dos_puts2.asm
 include libs/master.lib/dos_setvect.asm
 include libs/master.lib/egc.asm
-
-; =============== S U B	R O U T	I N E =======================================
-
-; Attributes: bp-based frame
-
-sub_734		proc far
-					; sub_ADE2+118P
-
-arg_0		= word ptr  6
-
-		push	bp
-		mov	bp, sp
-		push	ds
-		push	si
-		push	di
-		mov	bx, [bp+arg_0]
-		mov	al, 7
-		out	6Ah, al		; PC-98	GDC (6a):
-					;
-		mov	al, 80h	; '�'
-		out	7Ch, al
-		mov	al, 5
-		out	6Ah, al		; PC-98	GDC (6a):
-					;
-		mov	dx, 4A0h
-		mov	ax, 0FFF0h
-		out	dx, ax
-		mov	dx, 4A2h
-		mov	ax, 0FFh
-		out	dx, ax
-		mov	dx, 4A4h
-		mov	ax, 28F0h
-		out	dx, ax
-		mov	dx, 4A8h
-		mov	ax, 0FFFFh
-		out	dx, ax
-		mov	dx, 4ACh
-		mov	ax, bx
-		and	ax, 0Fh
-		out	dx, ax
-		mov	dx, 4AEh
-		mov	ax, 27Fh
-		sub	ax, bx
-		out	dx, ax
-		cld
-		mov	ax, 0A800h
-		mov	ds, ax
-		assume ds:nothing
-		mov	es, ax
-		assume es:nothing
-		mov	si, 0
-		mov	di, 0FFFEh
-		mov	ax, bx
-		shr	bx, 4
-		mov	bp, 29h	; ')'
-		sub	bp, bx
-		shl	bx, 1
-		dec	ax
-		shr	ax, 4
-		shl	ax, 1
-		add	si, ax
-		mov	dx, 2
-		sub	dx, bx
-		mov	bx, 190h
-		nop
-
-loc_7A2:
-		mov	cx, bp
-		rep movsw
-		sub	si, dx
-		sub	di, dx
-		dec	bx
-		jnz	short loc_7A2
-		mov	dx, 4A0h
-		mov	ax, 0FFF0h
-		out	dx, ax
-		mov	al, 4
-		out	6Ah, al		; PC-98	GDC (6a):
-					;
-		mov	al, 0
-		out	7Ch, al
-		mov	al, 6
-		out	6Ah, al		; PC-98	GDC (6a):
-					;
-		pop	di
-		pop	si
-		pop	ds
-		assume ds:dseg
-		pop	bp
-		retf	2
-sub_734		endp
-
-; ---------------------------------------------------------------------------
-		nop
+include libs/master.lib/egc_shift_left_all.asm
 
 ; =============== S U B	R O U T	I N E =======================================
 
@@ -17448,7 +17355,7 @@ var_2		= word ptr -2
 		push	0
 		call	sub_C37B
 		push	2
-		call	sub_734
+		call	egc_shift_left_all
 		mov	Palettes+45, 0
 		mov	Palettes+46, 0
 		mov	Palettes+47, 0
@@ -17506,7 +17413,7 @@ loc_AEE1:
 		mov	dx, 0A6h ; '�'
 		out	dx, al		; Interrupt Controller #2, 8259A
 		push	4
-		call	sub_734
+		call	egc_shift_left_all
 		sub	si, 2
 
 loc_AF02: