diff --git a/Shared_Includes b/Shared_Includes
index 94cb0e3..95d1fbb 160000
--- a/Shared_Includes
+++ b/Shared_Includes
@@ -1 +1 @@
-Subproject commit 94cb0e39f321bd11519008801187d93eacb280f2
+Subproject commit 95d1fbbb4a2b0de5e09534432be8caa51bcd2142
diff --git a/src/bios/exp/BIOS_FUNC.asm b/src/bios/exp/BIOS_FUNC.asm
index 39bd999..08612e3 100644
--- a/src/bios/exp/BIOS_FUNC.asm
+++ b/src/bios/exp/BIOS_FUNC.asm
@@ -509,7 +509,7 @@ TAB_5xFNS:
        DB      low  HDD_5x.VERIFY
        DB      low  HDD_5x.READ
        DB      low  HDD_5x.WRITE
-       DB      low  FN_ABSENT_5x
+       DB      low  HDD_5x.DETECT
        DB      low  HDD_5x.GETMED
        DB      low  HDD_5x.SETMED
 
@@ -603,7 +603,7 @@ TAB_5xFNS:
        DB       high HDD_5x.VERIFY
        DB       high HDD_5x.READ
        DB       high HDD_5x.WRITE
-       DB       high FN_ABSENT_5x
+       DB       high HDD_5x.DETECT
        DB       high HDD_5x.GETMED
        DB       high HDD_5x.SETMED
 
diff --git a/src/bios/exp/EXTENDED/HDD_DRIVER_6.asm b/src/bios/exp/EXTENDED/HDD_DRIVER_6.asm
index 1430d21..3b8533c 100644
--- a/src/bios/exp/EXTENDED/HDD_DRIVER_6.asm
+++ b/src/bios/exp/EXTENDED/HDD_DRIVER_6.asm
@@ -76,7 +76,8 @@ IDE3		EQU	#C1D8
 
 WRITE_OUTI_DUPs	EQU	32 ; bytes
 
-
+;[]================================================================[#51]
+;Function: Reset drive
 HDD_5x.RESET:                      ; !FIXIT не ресетится?
 ;For non-ATAPI drives, the only method a driver has of resetting a drive
 ; after a major error is to do a "software reset" on the bus.
@@ -86,6 +87,7 @@ HDD_5x.RESET:                      ; !FIXIT 
 ; automatically selected.
 	XOR	A
 	RET 
+;[]================================================================[#51]
 
 SELECTH:
 	AND	#0F
@@ -131,7 +133,7 @@ NODRIVE:
 	SCF 
 	RET 
 
-;[]===========================================================[]
+;[]================================================================[#58]
 ;Function: Get Current Media Parameters
 ;	A - Disk
 ;Return:
@@ -140,7 +142,6 @@ NODRIVE:
 ;      DE - Cylinders
 ;      IX - Capacity sector in bytes
 ;	B - Flags: ide chanel
-;[]===========================================================[]
 HDD_5x.GETMED:
 	CALL	SELECTH
 	RET	C
@@ -159,8 +160,9 @@ HDD_5x.GETMED:
 	EX	AF,AF'
 	AND	A
 	RET 
+;[]================================================================[#58]
 
-;[]===========================================================[]
+;[]================================================================[#59]
 ;Function: Set Current Media Parameters
 ;	A - Disk
 ;	H - Heads
@@ -169,7 +171,6 @@ HDD_5x.GETMED:
 ;      IX - Capacity sector in bytes
 ;	B - Flags
 ;Return: None
-;[]===========================================================[]
 HDD_5x.SETMED:
 	CALL	SELECTH
 	RET	C
@@ -187,8 +188,9 @@ HDD_5x.SETMED:
 	EX	AF,AF'
 	AND	A
 	RET 
+;[]================================================================[#59]
 
-;[]===========================================================[]
+;[]================================================================[#55]
 ;Function: Read	Sectors
 ;	A - Disk
 ;   HL:IX - Sector
@@ -197,13 +199,12 @@ HDD_5x.SETMED:
 ;Return:
 ;   HL:IX - Sector + Sector counter
 ;      DE - Address + (Sector counter *	Size sector)
-;[]===========================================================[]
 ;READ SECTOR(S)
 HDD_5x.READ:
 	EX	AF,AF'
 	IN	A,(SLOT3)
 	EX	AF,AF'
-;[]===========================================================[]
+;[]================================================================[#52]
 ;Function: Long	Read Sectors
 ;	A - Disk
 ;   HL:IX - Sector
@@ -213,7 +214,6 @@ HDD_5x.READ:
 ;Return:
 ;   HL:IX - Sector + Sector counter
 ;      DE - Address + (Sector counter *	Size sector)
-;[]===========================================================[]
 ;LONG READ SECTOR(S)
 HDD_5x.LONG_READ:
 	PUSH	IY
@@ -275,7 +275,6 @@ RST8RDR:
 	POP	IY
 	EX	AF,AF'
 	RET 
-
 ;READ SECTOR(S)
 RDS000:	CALL	SELECTH
 	RET	C
@@ -350,8 +349,10 @@ RDS004:	DUP 16
 	JP	NZ,RDS002
 	XOR	A
 	RET 
+;[]===========================================================[#52, #55]
 
-;[]===========================================================[]
+
+;[]================================================================[#56]
 ;Function: Write Sectors
 ;	A - Disk
 ;   HL:IX - Sector
@@ -360,13 +361,12 @@ RDS004:	DUP 16
 ;Return:
 ;   HL:IX - Sector + Sector counter
 ;      DE - Address + (Sector counter *	Size sector)
-;[]===========================================================[]
 ;WRITE SECTOR(S)
 HDD_5x.WRITE:
 	EX	AF,AF'
 	IN	A,(SLOT3)
 	EX	AF,AF'
-;[]===========================================================[]
+;[]================================================================[#53]
 ;Function: Long	Write Sectors
 ;	A - Disk
 ;   HL:IX - Sector
@@ -376,7 +376,6 @@ HDD_5x.WRITE:
 ;Return:
 ;   HL:IX - Sector + Sector counter
 ;      DE - Address + (Sector counter *	Size sector)
-;[]===========================================================[]
 ;WRITE SECTOR(S)
 HDD_5x.LONG_WRITE:
 	PUSH	IY
@@ -532,14 +531,15 @@ WRS003:
 	JP	NZ,WRS002
 	XOR	A
 	RET 
+;[]===========================================================[#53, #56]
 
-;[]===========================================================[]
+
+;[]================================================================[#54]
 ;Function: Verify Sectors
 ;	A - Disk
 ;   HL:IX - Sector
 ;	B - Sector counter
 ;Return: None
-;[]===========================================================[]
 ;VERIFY	SECTOR(S)
 HDD_5x.VERIFY:
 	PUSH	IY
@@ -557,7 +557,7 @@ HDD_5x.VERIFY:
 	EXX 
 	POP	IY
 	RET 
-
+;[]================================================================[#54]
 ;VERIFY	SECTOR(S)
 VRS000:	CALL	SELECTH
 	RET	C
@@ -588,7 +588,6 @@ VRS003:	LD	DE,#C140   ;WAIT BUSY=0 & ERR=0 & READY=1
 
 ; HL:IX	- LBA SECTOR
 ;     B	- SECTOR COUNTER
-
 PRESET:	LD	A,B
 	LD	BC,IDE.Write.Counter
 	OUT	(C),A
@@ -684,4 +683,39 @@ WAITPRT:
 .error:	LD	A,4     ;!HARDCODE error number
 	SCF 
 	RET 
-;=======================================================
\ No newline at end of file
+;=======================================================================
+
+;[]================================================================[#57]
+;Function: Detect Disk
+;	   A - Disk
+;Return:   CF=0 - A=Drive type
+;	   CF=1 - drive not present, A=#FF
+HDD_5x.DETECT:
+	CP	#84	;!HARDCODE max HDD drives (#80,#81,#82,#83)
+	CCF
+	RET	C
+
+	LD	HL,IDE.INIT_TBL_IDE0.DriveType
+	AND	3
+	JR	Z,.get_param
+	LD	HL,IDE.INIT_TBL_IDE1.DriveType
+	DEC	A
+	JR	Z,.get_param
+	LD	HL,IDE.INIT_TBL_IDE2.DriveType
+	DEC	A
+	JR	Z,.get_param
+	LD	HL,IDE.INIT_TBL_IDE3.DriveType
+.get_param:
+	IN	A,(SLOT3)
+	LD	B,A
+	LD	A,SYS_PAGE
+	OUT	(SLOT3),A
+	
+	LD	A,(HL)
+	LD	C,SLOT3
+	OUT	(C),B
+
+	CP	#FF
+	CCF
+	RET 
+;[]================================================================[#57]
\ No newline at end of file
diff --git a/src/bios/exp/FUNC_5x.asm b/src/bios/exp/FUNC_5x.asm
index 930a5db..0e1fc33 100644
--- a/src/bios/exp/FUNC_5x.asm
+++ b/src/bios/exp/FUNC_5x.asm
@@ -87,7 +87,7 @@ DRV_LIST:																; ????? 
 .NOT_CD1:
 .ABSIDE1:
 	LD	IY,IDE.INIT_TBL_IDE2
-	LD	A,(IY+IDE.HDD_INIT_TABLE.DriveType)						;IDE TYPE 1-HDD, 2-CD-ROM
+	LD	A,(IY+IDE.HDD_INIT_TABLE.DriveType)	;IDE TYPE 1-HDD, 2-CD-ROM
 	CP	#FF
 	JR	Z,.ABSIDE2
 	CP	IDE.Device.HDD
@@ -100,7 +100,7 @@ DRV_LIST:																; ????? 
 .NOT_CD2:
 .ABSIDE2:
 	LD	IY,IDE.INIT_TBL_IDE3
-	LD	A,(IY+IDE.HDD_INIT_TABLE.DriveType)						;IDE TYPE 1-HDD, 2-CD-ROM
+	LD	A,(IY+IDE.HDD_INIT_TABLE.DriveType)	;IDE TYPE 1-HDD, 2-CD-ROM
 	CP	#FF
 	JR	Z,.check_exit
 	CP	IDE.Device.HDD