diff --git a/src/bios/exp/EXTENDED/IDE/ATAPI_DRV.ASM b/src/bios/exp/EXTENDED/IDE/ATAPI_DRV.ASM
index 1cd53c7..c0e750f 100644
--- a/src/bios/exp/EXTENDED/IDE/ATAPI_DRV.ASM
+++ b/src/bios/exp/EXTENDED/IDE/ATAPI_DRV.ASM
@@ -62,12 +62,16 @@ ATAPI_5x_GET_PAR:
 		;
 .DriveSelected:	IN	A,(SLOT3)
 		AND	A
+		PUSH	AF
 		EX	AF,AF'
 		 LD	A,SYS_PAGE
 		 OUT	(SLOT3),A
 		 ;
 		 ; [ ] sector size. media changed
 		  CALL	ATAPI_CHECK_MEDIA_CHANGED
+		  EX	AF,AF'
+		   POP	AF
+		  EX	AF,AF'
 		  JR	NC,.get_data
 		  ;
 		  CP	BIOS.Error.ATAPI.UnitAttention
@@ -76,6 +80,9 @@ ATAPI_5x_GET_PAR:
 		  ;CP	BIOS.Error.ATAPI.NotReady
 		  ;SCF
 		  ;RET	NZ
+		  EX	AF,AF'
+		   OUT	(SLOT3),A
+		  EX	AF,AF
 		  LD	HL,#FFFF
 		  LD	D,H
 		  LD	E,L