seemingly working interpret from jf

nice
honestly it might not be a bad idea to add testing
*at this point*

1 files changed, 6 insertions, 0 deletions

diff --git a/readme.md b/readme.md
index 10ee749..b53648c 100644
--- a/readme.md
+++ b/readme.md
@@ -43,6 +43,9 @@ a variable that contains the first byte of user memory.
 ### `dp$   ( -- )`
 a variable that contains the last available byte of user memory.
 
+### `dup   ( u -- u u )`
+duplicate the value at the top of the stack.
+
 ### `executable   ( a u -- )`
 marks the u bytes starting at address a as executable.
 this is used primarily to mark the program break,
@@ -60,6 +63,9 @@ grows the user memory space by u bytes.
 ### `here   ( -- a )`
 yields the address of the first available byte in user memory.
 
+### `immediate?   ( xt -- ? )`
+true if xt is marked immediate, false otherwise.
+
 ### `interpret   ( -- )`
 interprets the contents of the terminal input buffer
 until it runs out.