diff --git a/graphics/hgr/fake_bios/Makefile b/graphics/hgr/fake_bios/Makefile
index f05cb4d0..2c2a5d93 100644
--- a/graphics/hgr/fake_bios/Makefile
+++ b/graphics/hgr/fake_bios/Makefile
@@ -28,7 +28,7 @@ fake_bios.o:	fake_bios.s \
 	font_console_1x8.s fonts/a2_cga_thin.inc \
 	pt3_lib_detect_model.s lc_detect.s aux_detect.s \
 	65c02_detect.s pt3_lib_mockingboard_detect.s \
-	pt3_lib_mockingboard_setup.s \
+	pt3_lib_mockingboard_setup.s wait.s \
 	zx02_optim.s graphics/a2_energy.hgr.zx02
 	ca65 -o fake_bios.o fake_bios.s -l fake_bios.lst
 
diff --git a/graphics/hgr/fake_bios/fake_bios.s b/graphics/hgr/fake_bios/fake_bios.s
index 133b04bb..a2e8caff 100644
--- a/graphics/hgr/fake_bios/fake_bios.s
+++ b/graphics/hgr/fake_bios/fake_bios.s
@@ -257,7 +257,7 @@ memcount_loop:
 	bmi	done_memcount				; 3
 
 	lda	#100
-	jsr	WAIT
+	jsr	wait
 
 	jsr	increment_memory
 	dec	MEMCOUNT
@@ -289,13 +289,13 @@ done_memcount:
 	jsr	fade_logo_mask
 
 	lda	#200
-	jsr	WAIT
+	jsr	wait
 
 	lda	#$33
 	jsr	fade_logo_mask
 
 	lda	#200
-	jsr	WAIT
+	jsr	wait
 
 	; clear screen while offscreen
 	; avoid blinds effect
@@ -658,7 +658,7 @@ dos_command_inner:
 	jsr	DrawCondensedString
 	dec	CH
 	lda	#200
-	jsr	WAIT
+	jsr	wait
 
 	lda	KEYPRESS
 	bmi	dos_keypress
@@ -666,7 +666,7 @@ dos_command_inner:
 	jsr	DrawCondensedStringAgain
 	dec	CH
 	lda	#200
-	jsr	WAIT
+	jsr	wait
 
 	lda	KEYPRESS
 	bmi	dos_keypress
@@ -736,7 +736,7 @@ inner_loop_smc2:
 	; in X
 long_wait:
 	lda	#200
-	jsr	WAIT
+	jsr	wait
 
 	lda	KEYPRESS
 	bmi	early_out
@@ -758,3 +758,7 @@ early_out:
 .include "65c02_detect.s"
 .include "pt3_lib_mockingboard_setup.s"
 .include "pt3_lib_mockingboard_detect.s"
+
+
+.include "wait.s"
+
diff --git a/graphics/hgr/fake_bios/wait.s b/graphics/hgr/fake_bios/wait.s
new file mode 100644
index 00000000..12c4319c
--- /dev/null
+++ b/graphics/hgr/fake_bios/wait.s
@@ -0,0 +1,18 @@
+; copy of ROM wait
+; because we might disable ROM
+
+
+wait:
+	sec
+wait2:
+	pha
+wait3:
+	sbc	#$01
+	bne	wait3
+	pla
+	sbc	#$01
+	bne	wait2
+	rts
+wait_end:
+
+.assert (>wait_end - >wait) < 1 , error, "wait crosses page boundary"