--- np2/romimage/SASIBIOS.ASM	2004/01/31 20:05:23	1.3
+++ np2/romimage/SASIBIOS.ASM	2004/03/19 00:30:01	1.4
@@ -1,11 +1,11 @@
 
-CODE	SEGMENT
-		ASSUME CS:CODE,DS:nothing,ES:nothing,SS:nothing
-		ORG 0000H
+	ORG		0
+	USE16
+	CPU		8086
 
-FIXCS		equ		2eh
+segment .sasi start=0x0000
 
-START:			retf						; 00
+				retf						; 00
 				nop
 				nop
 				retf						; 03
@@ -15,16 +15,16 @@ START:			retf						; 00
 				nop
 				nop
 				db	055h, 0aah, 002h		; 09
-				jmp		short sasi_init1	; 0c
+				jmp		short init1			; 0c
 				nop
-				jmp		short sasi_init2	; 0f
+				jmp		short init2			; 0f
 				nop
 				retf						; 12
 				nop
 				nop
-				jmp		short sasi_boot		; 15
+				jmp		short boot			; 15
 				nop
-				jmp		short sasi_bios		; 18
+				jmp		short bios			; 18
 				nop
 				retf						; 1b
 				nop
@@ -48,32 +48,28 @@ START:			retf						; 00
 				nop
 				nop
 
-sasi_init1:		mov		byte ptr [bx], 0d9h
+init1:			mov		byte [bx], 0xd9
 				retf
 
-sasi_init2:		mov		ax, cs
-				mov		word ptr ds:[0044h], offset sasiint
-				mov		ds:[0046h], ax
-				mov		ds:[04b0h], ah
-				mov		ds:[04b8h], ah
-				mov		ax, 0300h
-				int		1bh
+init2:			mov		ax, cs
+				mov		word [0x0044], sasiint
+				mov		[0x0046], ax
+				mov		[0x04b0], ah
+				mov		[0x04b8], ah
+				mov		ax, 0x0300
+				int		0x1b
 				retf
 
-sasi_bios:		cld
+bios:			cld
 				mov		dx, cs
 				mov		ds, dx
 				mov		cx, 8
-				mov		si, offset sasibiosstr
-				mov		dx, 07efh
+				mov		si, sasibiosstr
+				mov		dx, 0x07ef
 				cli
-	if 1
-@@:				lodsb
+.loop:			lodsb
 				out		dx, al
-				loop	short @b
-	else
-				rep		outsb
-	endif
+				loop	.loop
 				sti
 				pop		ax
 				pop		bx
@@ -86,65 +82,63 @@ sasi_bios:		cld
 				pop		ds
 				iret
 
-sasi_boot:		cmp		al, 0ah
-				je		short sasi_boot2
-				cmp		al, 0bh
-				je		short sasi_boot2
+boot:			cmp		al, 0x0a
+				je		short .main
+				cmp		al, 0x0b
+				je		short .main
 				retf
 
-sasi_boot2:		sub		al, 9
-				mov		dl, 0ffh
-				test	ds:[055dh], al			; sasi
-				je		short boot_exit
+.main:			sub		al, 9
+				test	[0x055d], al			; sasi
+				je		short .exit
 				dec		al
-				mov		ah, 06h
-				mov		cx, 1fc0h
+				mov		ah, 0x06
+				mov		cx, 0x1fc0
 				mov		es, cx
-				mov		bp, bx
-				mov		cx, bx
-				mov		dx, bx
-				mov		bh, 4
-				int		1bh
-				jc		short boot_exit
-				or		al, 80h
-				mov		byte ptr ds:[0584h], al
-				db		9ah					; call far
-				dw		0
-				dw		1fc0h
-boot_exit:		retf
+				xor		bp, bp
+				mov		bx, 0x0400
+				xor		cx, cx
+				xor		dx, dx
+				int		0x1b
+				jc		short .exit
+				or		al, 0x80
+				mov		[0x0584], al
+				db		0x9a					; call far
+				dw		0x0000
+				dw		0x1fc0
+.exit:			retf
 
 
 ; MS-DOSがこの割り込みを使用する...
 
 sasiint:		push	ax
-				in		al, 82h
-				and		al, 0fdh
-				cmp		al, 0adh
-				je		short sasireadstat
-				and		al, 0f9h
-				cmp		al, 0a1h
-				jne		short sasiinteoi
-sasireadstat:	push	ds
+				in		al, 0x82
+				and		al, 0xfd
+				cmp		al, 0xad
+				je		short .readstat
+				and		al, 0xf9
+				cmp		al, 0xa1
+				jne		short .eoi
+.readstat:		push	ds
 				xor		ax, ax
 				mov		ds, ax
-				or		byte ptr ds:[055fh], 1
-				mov		al, 0c0h
-				out		82h, al
+				or		byte [0x055f], 1
+				mov		al, 0xc0
+				out		0x82, al
 				pop		ds
-sasiinteoi:		mov		al, 20h
-				out		08h, al
-				mov		al, 0bh
-				out		08h, al
-				in		al, 08h
+.eoi:			mov		al, 0x20
+				out		0x08, al
+				mov		al, 0x0b
+				out		0x08, al
+				in		al, 0x08
 				test	al, al
-				jne		short sasiintexit
-				mov		al, 20h
-				out		00h, al
-sasiintexit:	pop		ax
+				jne		short .exit
+				mov		al, 0x20
+				out		0x00, al
+.exit:			pop		ax
 				iret
 
 sasibiosstr		db		"sasibios"
 
-CODE	ENDS
-	END START
+	ends