diff --git a/libsrc/geos-common/conio/Makefile b/libsrc/geos-common/conio/Makefile
index 106754541..228364759 100644
--- a/libsrc/geos-common/conio/Makefile
+++ b/libsrc/geos-common/conio/Makefile
@@ -10,11 +10,10 @@ S_OBJS +=	_scrsize.o	\
 		cgetc.o		\
 		chline.o	\
 		clrscr.o	\
-		color.o		\
 		cputc.o		\
 		cursor.o	\
 		cvline.o	\
+		dummies.o	\
 		gotoxy.o	\
 		kbhit.o		\
-		revers.o	\
 		where.o
diff --git a/libsrc/geos-common/conio/color.s b/libsrc/geos-common/conio/dummies.s
similarity index 52%
rename from libsrc/geos-common/conio/color.s
rename to libsrc/geos-common/conio/dummies.s
index fbf86e947..ac494106d 100644
--- a/libsrc/geos-common/conio/color.s
+++ b/libsrc/geos-common/conio/dummies.s
@@ -6,13 +6,13 @@
 ; unsigned char __fastcall__ textcolor (unsigned char color);
 ; unsigned char __fastcall__ bgcolor (unsigned char color);
 ; unsigned char __fastcall__ bordercolor (unsigned char color);
+; unsigned char __fastcall__ revers (unsigned char onoff);
 ;
 
- 	    .export _textcolor, _bgcolor, _bordercolor
+ 	    .export _textcolor, _bgcolor, _bordercolor, _revers
+	    .import return0
 
-; for GEOS 2.0 there is no color support, perhaps Wheels has it
-
-_textcolor:
-_bgcolor:
-_bordercolor:
-	rts
+_textcolor	= return0
+_bgcolor	= return0
+_bordercolor	= return0
+_revers		= return0
diff --git a/libsrc/geos-common/conio/revers.s b/libsrc/geos-common/conio/revers.s
deleted file mode 100644
index 320ed6a9d..000000000
--- a/libsrc/geos-common/conio/revers.s
+++ /dev/null
@@ -1,35 +0,0 @@
-;
-; Maciej 'YTM/Elysium' Witkowiak
-;
-; 27.10.2001
-
-; unsigned char revers (unsigned char onoff);
-
-	    .export _revers
-	    .importzp tmp1
-
-	    .include "geossym.inc"
-	    .include "const.inc"
-
-_revers:
-	tax
-	bne L0			; turn on
-	lda #0
-	.byte $2c
-L0:	lda #SET_REVERSE
-	sta tmp1
-
-	lda currentMode
-	tax
-	and #SET_REVERSE
-	tay			; store old value
-	txa
-	and #%11011111		; mask out
-	ora tmp1		; set new value
-	sta currentMode
-
-	ldx #0
-	tya
-	beq L1
-	lda #1
-L1:	rts