some erroring stuff

1 files changed, 26 insertions, 3 deletions

diff --git a/readme.md b/readme.md
index b5eae4b..df4c021 100644
--- a/readme.md
+++ b/readme.md
@@ -58,6 +58,10 @@ have a closing bracket: ).
 ### `(0handler)   ( -- )`
 the very early error handler, which simply quits the program.
 
+### `(abort")   ( ? -- )`
+perform the runtime actions of `abort"`:
+check for non-zero and print and abort, or do nothing.
+
 ### `(create)   ( -- )`
 the default behaviour of a word made by `create`,
 which simply pushes the address following the definition to the stack.
@@ -121,6 +125,10 @@ of a `value`. (in compile mode u is whatever was on the stack already.)
 rotate the three topmost values on the stack so that the topmost value
 is moved to the third highest.
 
+### `."   ( -- ) IMMEDIATE COMPILE-ONLY`
+compile into the current definition the following string (terminated by `"`)
+being written to output.
+
 ### `/buffer   ( -- u )`
 the size of an input buffer.
 
@@ -228,13 +236,13 @@ if a word was found,
 its link field address is returned along with the true flag.
 if no word was found or the string is of length zero, abort.
 
-### `?notfound   ( -- )`
+### `?notfound?   ( -- )`
 produce a word not found error.
 
-### `?overflow   ( -- )`
+### `?overflow?   ( -- )`
 produce a stack overflow error.
 
-### `?underflow   ( -- )`
+### `?underflow?   ( -- )`
 produce a stack underflow error.
 
 ### `0=   ( n -- ? )`
@@ -271,6 +279,11 @@ duplicate the two topmost values on the stack.
 call the error handler
 (the address of which is in the variable `handler`)
 
+### `abort"   ( ? -- ) IMMEDIATE COMPILE-ONLY`
+if `?` is non-zero, write the message that follows (terminated by `"`)
+to standard out then call the error handler.
+(the address of which is in the variable `handler`)
+
 ### `again   ( -- ) IMMEDIATE COMPILE-ONLY`
 complete an infinite loop began by the word `begin`.
 
@@ -418,6 +431,10 @@ remove the value at the top of the stack.
 ### `dup   ( u -- u u )`
 duplicate the value at the top of the stack.
 
+### `e."   ( -- ) IMMEDIATE COMPILE-ONLY`
+compile into the current definition the following string (terminated by `"`)
+being written to error output.
+
 ### `else   ( -- ) IMMEDIATE COMPILE-ONLY`
 update the current if statement to branch here
 when the flag is false,
@@ -426,6 +443,9 @@ and skip to `then` if the corresponding `if` was true.
 ### `emit   ( c -- )`
 print the single character c to output.
 
+### `etype   ( a u -- )`
+write u characters at a to error output.
+
 ### `executable   ( a u -- )`
 marks the u bytes starting at address a as executable.
 this is used primarily to mark the program break,
@@ -638,6 +658,9 @@ yield the address of the stack pointer.
 note that the address points to the stack *before*
 this value is pushed.
 
+### `sp-reset   ( -- )`
+reset the working stack pointer to its starting value.
+
 ### `state   ( -- a )`
 a variable containing a boolean value.
 if 0 (false), the system is in interpreting mode,