--- np2/romimage/SASIBIOS.ASM	2004/01/22 01:11:29	1.1
+++ np2/romimage/SASIBIOS.ASM	2004/01/27 03:24:19	1.2
@@ -53,6 +53,8 @@ sasi_init1:		mov		byte ptr [bx], 0d9h
 				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
@@ -106,7 +108,37 @@ sasi_boot2:		sub		al, 9
 				dw		1fc0h
 boot_exit:		retf
 
-sasibiosstr		db		"scsibios"
+
+; 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
+				xor		ax, ax
+				mov		ds, ax
+				or		byte ptr ds:[055fh], 1
+				mov		al, 0c0h
+				out		82h, al
+				pop		ds
+sasiinteoi:		mov		al, 20h
+				out		08h, al
+				mov		al, 0bh
+				out		08h, al
+				in		al, 08h
+				test	al, al
+				jne		short sasiintexit
+				mov		al, 20h
+				out		00h, al
+sasiintexit:	pop		ax
+				iret
+
+sasibiosstr		db		"sasibios"
 
 CODE	ENDS
 	END START