diff --git a/hyphae/instructions.toml b/hyphae/instructions.toml
index fa85567..87f6617 100644
--- a/hyphae/instructions.toml
+++ b/hyphae/instructions.toml
@@ -235,18 +235,6 @@ args = ["src"]
 output = ""
 description = "mutates a number datum into a char datum"
 
-[[instructions]]
-name = "ntoi"
-args = ["src"]
-output = ""
-description = "mutates a number datum into its exact form"
-
-[[instructions]]
-name = "ntoe"
-args = ["src"]
-output = ""
-description = "mutates a number datum into its inexact form"
-
 [[instructions]]
 name = "mkvec"
 args = []
@@ -301,3 +289,14 @@ args = ["list"]
 output = "returns last element in cons cell"
 description = "takes an AST and returns last element in top level cons cell"
 
+[[instructions]]
+name = "parse"
+args = ["input"]
+output = "parses an AST from input string"
+description = "calls parse and lex routine on an input string"
+
+[[instructions]]
+name = "eval"
+args = []
+output = "result of compiled instructions"
+description = "expects AST in expr. compiles it to instructions and runs them"
diff --git a/hyphae/src/vm.rs b/hyphae/src/vm.rs
index 089e1fd..1279ee6 100644
--- a/hyphae/src/vm.rs
+++ b/hyphae/src/vm.rs
@@ -437,19 +437,12 @@ impl VM {
                     e!("illegal argument to CAR instruction");
                 };
 
-                self.expr = (*arg.1).clone();
+                self.expr = (*arg.0).clone();
             },
 
-            i::CONS  => {
-                /* CONS BEHAVIOR
-                 * L Datum is not list means create a new standard form list
-                 * L Datum is list then append the second element to the first
-                 */
-            },
-
-            // in order to maintain a language agnostic VM these must be traps
-            //i::PARSE => todo!("implement AST API"),
-            //i::EVAL  => todo!("implement AST API"),
+            i::CONS  => todo!("implement AST API"),
+            i::PARSE => todo!("implement AST API"),
+            i::EVAL  => todo!("implement AST API"),
 
             _ => {
                 e!("illegal instruction");