diff --git a/src/bios/exp/EXTENDED/IDE/ATAPI_DRV.ASM b/src/bios/exp/EXTENDED/IDE/ATAPI_DRV.ASM
index 2d84a1c..ebed052 100644
--- a/src/bios/exp/EXTENDED/IDE/ATAPI_DRV.ASM
+++ b/src/bios/exp/EXTENDED/IDE/ATAPI_DRV.ASM
@@ -229,10 +229,10 @@ EXEC_PACKET_COMMAND:
 		 LD	BC,IDE.Write.Command
 		 LD	A,IDE.ATAPI.Packet
 		 OUT	(C),A
-		 ;CALL	CD_WAITPRT
-		;EXX 
-		;RET	C
-		;EXX 
+		 CALL	CD_WAITPRT
+		EXX 
+		RET	C
+		EXX 
 		 LD	DE,256*(IDE.CtrlByte.DataRequest+IDE.CtrlByte.Error)+IDE.CtrlByte.DataRequest
 		 CALL	CD_WAITPRT.Custom
 		EXX 
@@ -371,7 +371,7 @@ EXEC_PACKET_COMMAND:
 
 ;----------------------------------------------------------------------;
 ; D - MASK, E - PATTERN
-CD_WAITPRT:	LD	DE,256*(IDE.CtrlByte.DataRequest) + 0
+CD_WAITPRT:	LD	DE,256*(IDE.CtrlByte.Busy) + 0
 .Custom:	LD	B,100
 		LD	HL,#0000
 .LOOP:		LD	A,high IDE.Read.Status