diff --git a/src/bios/exp/FUNC_RAM_ROM_DRV.ASM b/src/bios/exp/FUNC_RAM_ROM_DRV.ASM
index 5b22aab..6d52e70 100644
--- a/src/bios/exp/FUNC_RAM_ROM_DRV.ASM
+++ b/src/bios/exp/FUNC_RAM_ROM_DRV.ASM
@@ -231,7 +231,8 @@ EMM.FreeMem:
 	AND A
 	SCF
 	RET Z
-
+	CP	ZX_RAM_ID
+	CALL	Z,SET_ROM_FLAG_ZX
 	LD L,A
 	IN A,(SLOT3)
 	EX AF,AF'
diff --git a/src/bios/exp/FUNC_SERVICE.asm b/src/bios/exp/FUNC_SERVICE.asm
index 123add6..3546d28 100644
--- a/src/bios/exp/FUNC_SERVICE.asm
+++ b/src/bios/exp/FUNC_SERVICE.asm
@@ -331,4 +331,22 @@ REINIT:	DEC     B
 	JR .loop2
 ;
 ;----------------------------------------------------------------------;
+;
+
+;
+;----------------------------------------------------------------------;
+SET_ROM_FLAG_ZX:
+	LD	C,A
+	IN	A,(SLOT3)
+	PUSH	AF
+	LD	A,Spec_Page
+	OUT	(SLOT3),A
+	XOR	A
+	LD	(Spec_Page.flag_Z),A
+	LD	(Spec_Page.flag_X),A
+	POP	AF
+	OUT	(SLOT3),A
+	LD	A,C
+	RET
+;----------------------------------------------------------------------;
 ;
\ No newline at end of file