diff --git a/src/libsrc/portio.pla b/src/libsrc/portio.pla
index 23e4d4e..0135a0d 100644
--- a/src/libsrc/portio.pla
+++ b/src/libsrc/portio.pla
@@ -25,23 +25,23 @@ export def portRead
   return (^FLAG0>>7)&1|(^FLAG1>>6)&2|(^FLAG2>>5)&4|(^FLAG3>>4)&8
 end
 
-def digitalWrite(pin, val)
-  return ^ANN0[((pin&3)<<1)+val&1]
+def digitalWrite(pin, val)#0
+  ^ANN0[((pin&3)<<1)+val&1]
 end
 
-export def portWrite(val)
+export def portWrite(val)#0
   ^ANN0[val&1]
   ^ANN1[(val>>1)&1]
   ^ANN2[(val>>2)&1]
-  return ^ANN3[(val>>3)&1]
+  ^ANN3[(val>>3)&1]
 end
 
 export def analogRead(pin)
   return call(PREAD,0,pin&3,0,0).2
 end
 
-export def delay(time)
-  return call(WAIT,time,0,0,0)
+export def delay(time)#0
+  call(WAIT,time,0,0,0)
 end
 
 done