diff --git a/images/apple/PLEIADES-2.20-SYS.po b/images/apple/PLEIADES-2.20-SYS.po
index 6ce3908..0f66189 100644
Binary files a/images/apple/PLEIADES-2.20-SYS.po and b/images/apple/PLEIADES-2.20-SYS.po differ
diff --git a/images/apple/PLEIADES-2.20.po b/images/apple/PLEIADES-2.20.po
index db736c7..801e890 100644
Binary files a/images/apple/PLEIADES-2.20.po and b/images/apple/PLEIADES-2.20.po differ
diff --git a/images/apple/PLFORTH.po b/images/apple/PLFORTH.po
index a949d54..9237634 100644
Binary files a/images/apple/PLFORTH.po and b/images/apple/PLFORTH.po differ
diff --git a/src/scripts/portio.4th b/src/scripts/portio.4th
index 470527a..771b56a 100644
--- a/src/scripts/portio.4th
+++ b/src/scripts/portio.4th
@@ -6,4 +6,5 @@ LOOKUP PORTREAD     PLASMA PORTREAD
 LOOKUP DIGITALWRITE PLASMA DIGITALWRITE
 LOOKUP PORTWRITE    PLASMA PORTWRITE
 LOOKUP ANALOGREAD   PLASMA ANALOGREAD
+LOOKUP DELAY        PLASMA DELAY
 LOOKUP STROBE       PLASMA STROBE