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diff --git a/amforth-6.5/msp430/lib/forth-2012/core/evaluate.frt b/amforth-6.5/msp430/lib/forth-2012/core/evaluate.frt
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+\ evaluate
+\ temporarily redirect the input source
+\ to string buffer. Return the the previous
+\ input source afterwards and continue
+
+\ some helper words
+variable strlen
+variable str
+: source-string str @ strlen @ ;
+
+: evaluate \ i*x addr len -- j*y
+ ['] source defer@ >r
+ >in @ >r
+ 0 >in !
+ strlen !
+ str !
+ ['] source-string to source
+ ['] interpret catch
+ r> >in !
+ r> to source
+ throw
+;