fix s" also rp sp and emit

1 files changed, 13 insertions, 0 deletions

diff --git a/readme.md b/readme.md
index 00f79dd..beb2a86 100644
--- a/readme.md
+++ b/readme.md
@@ -321,6 +321,9 @@ update the current if statement to branch here
 when the flag is false,
 and skip to `then` if the corresponding `if` was true.
 
+### `emit   ( c -- )`
+print the single character c to output.
+
 ### `executable   ( a u -- )`
 marks the u bytes starting at address a as executable.
 this is used primarily to mark the program break,
@@ -420,6 +423,11 @@ in a begin-while-repeat loop, loop back to the condition.
 ### `rot   ( u1 u2 u3 -- u2 u3 u1 )`
 rotate the top three values on the stack so that the third highest value is moved to the top.
 
+### `rp   ( -- a )`
+yield the address of the return pointer.
+note that the address points to the return stack *before*
+this word was called.
+
 ### `s"   ( "string" -- ) IMMEDIATE COMPILE-ONLY`
 compile into the definition code to push the given string,
 terminated by a double quote.
@@ -436,6 +444,11 @@ if -1 (true), the system is in compiling mode.
 ### `stderr   ( -- 2 )`
 push the file descriptor of stderr to the stack.
 
+### `sp   ( -- a )`
+yield the address of the stack pointer.
+note that the address points to the stack *before*
+this value is pushed.
+
 ### `stdout   ( -- 1 )`
 push the file descriptor of stdout to the stack.