ATAPI устройство всегда получает букву, даже без носителя

DSS/drivers/media/atapi-drv.asm

@@ -247,7 +247,7 @@ INIT_H:		PUSH	IY
 		 LD	A,C
 		OUT	(SLOT3),A
 		JR	Z,.NO_HARDS
-		LD	C,#80	;!HARDCODE - ID ATA ¤«ï ¯à®æ¥¤ãàë BIOS.DRV_DETECT
+		LD	C,DRIVE_CODES.SPRINTER.ATA
 		CALL	.NX_DVCI
 		;
 
@@ -255,7 +255,7 @@ INIT_H:		PUSH	IY
 		JR	Z,.skip_atapi
 		;
 		LD	B,A
-		LD	C,#C0	;!HARDCODE - ID ATAPI ¤«ï ¯à®æ¥¤ãàë BIOS.DRV_DETECT
+		LD	C,DRIVE_CODES.SPRINTER.ATAPI
 		CALL	.NX_DVCI
 		;
 .skip_atapi:	POP	IY
@@ -588,11 +588,38 @@ DEFINE_PARTITIONS:
 		;
 		CP	PartitionSysTypes.Win_Ext_LBA
 		JR	Z,.SubLevel
-		JR	.NextPartition		; à §¤¥« ­¥ ¯®¤¤¥à¦¨¢ ¥âáï
-
-.ATAPI_TST:	;!FIXIT CDFS
+		JP	.NextPartition		; à §¤¥« ­¥ ¯®¤¤¥à¦¨¢ ¥âáï
+		;
+		
+.ATAPI_TST:	;JR	.check_atapi	;!FIXIT CDFS
+		;SCF
+		;RET
+.check_atapi:	LD	A,(DRV_NUM)
+		AND	#F0
+		CP	DRIVE_CODES.SPRINTER.ATAPI
 		SCF
-		RET
+		RET	NZ
+		;
+		; No Media
+		XOR	A
+		;BPB SECTOR
+		LD	IX,(OFFSECT)
+		LD	(IX + LOGDRV.SECTOR_OFFSET + 0),A	
+		LD	(IX + LOGDRV.SECTOR_OFFSET + 1),A
+		LD	(IX + LOGDRV.SECTOR_OFFSET + 2),A
+		LD	(IX + LOGDRV.SECTOR_OFFSET + 3),A
+		;SIZE DISK
+		LD	(IX + LOGDRV.SIZE_IN_SECTORS + 0),A
+		LD	(IX + LOGDRV.SIZE_IN_SECTORS + 1),A
+		LD	(IX + LOGDRV.SIZE_IN_SECTORS + 2),A
+		LD	(IX + LOGDRV.SIZE_IN_SECTORS + 3),A
+		; ¤«ï ¯à ¢¨«ì­®£® ¢ë室  ¨§ ¯ àá¥à  à §¤¥«®¢
+		LD	B,1
+		PUSH	BC
+		;§ £à㧪  á  ªâ¨¢­®£® à §¤¥« ,   ­¥ á ¯¥à¢®£®
+		DEC	A
+		JR	.not_supported
+		;
 
 .BEGIN:		;CP	IDE.Device.HDD
 		;RET	NZ
@@ -603,7 +630,10 @@ DEFINE_PARTITIONS:
 		CALL	.Start
 		POP	AF
 		OUT	(SLOT3),A
-		RET 
+		RET
+		;
+
+		;
 .Start:		LD	IX,0
 		LD	DE,0
 		LD	(EXTDOSL),DE	;R01
@@ -612,9 +642,9 @@ DEFINE_PARTITIONS:
 .LOOP:		LD	(CURRENT_SECTOR_L),DE
 		LD	(CURRENT_SECTOR_H),IX
 		CALL	.LOAD_SECTOR
-		RET	C
+		JR	C,.check_atapi
 		;
-		LD	HL,(PARTITION_BUFFER.MBR_SIGNATURE)
+.check_sign:	LD	HL,(PARTITION_BUFFER.MBR_SIGNATURE)
 		LD	DE,#AA55
 		AND	A
 		SBC	HL,DE
@@ -638,7 +668,7 @@ DEFINE_PARTITIONS:
 		CP	PartitionSysTypes.Extended
 		JR	Z,.SubLevel
 		CP	PartitionSysTypes.Win_Ext_LBA
-		JR	NZ,.NotExtended
+		JP	NZ,.NotExtended
 		;
 .SubLevel:	PUSH	IY
 		LD	DE,(CURRENT_SECTOR_L)