diff --git a/common/boot.fs b/common/boot.fs
index a07a82b..f93b33e 100644
--- a/common/boot.fs
+++ b/common/boot.fs
@@ -16,12 +16,6 @@
 sp@ constant sp0
 rp@ constant rp0
 fp@ constant fp0
-: depth ( -- n ) sp@ sp0 - cell/ ;
-: fdepth ( -- n ) fp@ fp0 - 4 / ;
-
-( Useful heap size words )
-: remaining ( -- n ) 'heap-start @ 'heap-size @ + 'heap @ - ;
-: used ( -- n ) 'heap @ sp@ 'stack-cells @ cells + - 28 + ;
 
 ( Quoting Words )
 : ' bl parse 2dup find dup >r -rot r> 0= 'notfound @ execute 2drop ;
@@ -85,7 +79,7 @@ create RECSTACK 0 , 10 cells allot
 : postpone ( "name" -- ) bl parse RECSTACK RECOGNIZE @ execute ; immediate
 : +evaluate1
   bl parse dup 0= if 2drop exit then
-  RECSTACK RECOGNIZE state @ 2 + cells + @ execute
+  RECSTACK RECOGNIZE state @ 1+ 1+ cells + @ execute
 ;
 
 ( Setup recognizing words. )
@@ -108,6 +102,14 @@ create RECSTACK 0 , 10 cells allot
 ;
 ' REC-NUM +RECOGNIZER
 
+: interpret0 begin +evaluate1 again ; interpret0
+
+( Useful stack/heap words )
+: depth ( -- n ) sp@ sp0 - cell/ ;
+: fdepth ( -- n ) fp@ fp0 - 4 / ;
+: remaining ( -- n ) 'heap-start @ 'heap-size @ + 'heap @ - ;
+: used ( -- n ) 'heap @ sp@ 'stack-cells @ cells + - 28 + ;
+
 ( DO..LOOP )
 variable leaving
 : leaving,   here leaving @ , leaving ! ;
diff --git a/common/core.h b/common/core.h
index c073043..aeb3633 100644
--- a/common/core.h
+++ b/common/core.h
@@ -188,35 +188,12 @@ static cell_t *evaluate1(cell_t *rp) {
       call = xt;
     }
   } else {
-    cell_t n;
-    if (convert((const char *) name, len, g_sys->base, &n)) {
-      if (g_sys->state) {
-        COMMA(g_sys->DOLIT_XT);
-        COMMA(n);
-      } else {
-        PUSH n;
-      }
-    } else {
-      float f;
-      if (fconvert((const char *) name, len, &f)) {
-        if (g_sys->state) {
-          COMMA(g_sys->DOFLIT_XT);
-          *(float *) g_sys->heap++ = f;
-        } else {
-          *++fp = f;
-        }
-      } else {
 #if PRINT_ERRORS
-        fprintf(stderr, "CANT FIND: ");
-        fwrite((void *) name, 1, len, stderr);
-        fprintf(stderr, "\n");
+    fprintf(stderr, "CANT FIND: ");
+    fwrite((void *) name, 1, len, stderr);
+    fprintf(stderr, "\n");
 #endif
-        PUSH name;
-        PUSH len;
-        PUSH -1;
-        call = g_sys->notfound;
-      }
-    }
+    return 0;
   }
   PUSH call;
   PARK;
diff --git a/common/forth_namespace_tests.fs b/common/forth_namespace_tests.fs
index 1a77f84..efd6312 100644
--- a/common/forth_namespace_tests.fs
+++ b/common/forth_namespace_tests.fs
@@ -115,6 +115,10 @@ e: check-boot
   out: UNLOOP 
   out: ?do 
   out: do 
+  out: used 
+  out: remaining 
+  out: fdepth 
+  out: depth 
   out: postpone 
   out: next 
   out: for 
@@ -134,10 +138,6 @@ e: check-boot
   out: char 
   out: ['] 
   out: ' 
-  out: used 
-  out: remaining 
-  out: fdepth 
-  out: depth 
   out: fp0 
   out: rp0 
   out: sp0 
@@ -159,6 +159,11 @@ e: check-tier2-opcodes
 ;e
 
 e: check-tier1-opcodes
+  out: 0 
+  out: 1 
+  out: -1 
+  out: 10 
+  out: 41 
   out: nip 
   out: rdrop 
   out: */ 
diff --git a/common/tier1_opcodes.h b/common/tier1_opcodes.h
index 5ff347f..b83833c 100644
--- a/common/tier1_opcodes.h
+++ b/common/tier1_opcodes.h
@@ -13,6 +13,11 @@
 // limitations under the License.
 
 #define TIER1_OPCODE_LIST \
+  X("0", ZERO, PUSH 0) \
+  X("1", ONE, PUSH 1) \
+  X("-1", NEGATIVEONE, PUSH -1) \
+  X("10", TEN, PUSH 10) \
+  X("41", FOURTYONE, PUSH 41) \
   Y(nip, NIP) \
   Y(rdrop, --rp) \
   XV(forth, "*/", STARSLASH, SSMOD_FUNC; NIP) \
diff --git a/common/vocabulary.fs b/common/vocabulary.fs
index db6ad3d..0686786 100644
--- a/common/vocabulary.fs
+++ b/common/vocabulary.fs
@@ -61,7 +61,7 @@ transfer{
   tib-setup input-limit sp-limit ?stack
   [SKIP] [SKIP]' raw-ok boot-prompt free.
   $place zplace BUILTIN_MARK
-  nest-depth handler +evaluate1 do-notfound
+  nest-depth handler +evaluate1 do-notfound interpret0
 }transfer
 
 ( Move branching opcodes to separate vocabulary. )