diff --git a/examples/testforth.asm b/examples/testforth.asm
index 19a57f7..e24f2a7 100644
--- a/examples/testforth.asm
+++ b/examples/testforth.asm
@@ -11,21 +11,36 @@
 .org prev
 .delete prev, diff
 
-.define_eval prev, OFFSET
-  .bytes NULL
-  .bytes NULL
+; .define_eval prev, OFFSET
+;
+;   .bytes CORE_U16_MAX, CORE_U16_MAX
+;
+; .define_eval JUMP_TABLE_CONDITIONS_SIZE, (OFFSET - prev)
+; .org prev
+; .delete prev
 
-.define_eval INDEX_CONDITIONS_SIZE, (OFFSET - prev)
-.org prev
-.delete prev
+; .define_eval JUMP_TABLE_WORDS_SIZE, (0 * 2)
 
-.debug INDEX_CONDITIONS_SIZE
+; .define_eval MEM_JUMP_TABLE_LEN, (JUMP_TABLE_CONDITIONS_SIZE + JUMP_TABLE_WORDS_SIZE / 2)
+; .define_eval MEM_JUMP_TABLE_PTR, CORE_MEM_MEM
+; .define_eval MEM_JUMP_TABLE_END, (MEM_JUMP_TABLE_PTR + MEM_JUMP_TABLE_LEN)
 
-; index
-  index_conditions_if_0: 
+; .debug MEM_JUMP_TABLE_LEN, MEM_JUMP_TABLE_PTR, MEM_JUMP_TABLE_END
 
+; ; jump table
+;   ; conditions
+;
+;   jump_table_conditions_if_0: .bytes 444
+;
+;   jump_table_conditions_else_0: .bytes 5498
+;
+;
 
-.define_eval MEM_LOOP_DEPTH, CORE_MEM_MEM
+.define_eval MEM_JUMP_TABLE_LEN, 9
+.define_eval MEM_JUMP_TABLE_PTR, CORE_MEM_MEM
+.define_eval MEM_JUMP_TABLE_END, (MEM_JUMP_TABLE_PTR + MEM_JUMP_TABLE_LEN)
+
+.define_eval MEM_LOOP_DEPTH, (MEM_JUMP_TABLE_END + 1)
 .define_eval MEM_LOOP_I, (MEM_LOOP_DEPTH + 1)
 .define_eval MEM_LOOP_J, (MEM_LOOP_I + 1)
 
@@ -42,9 +57,14 @@
   tlr CORE_REG_A
 .endmacro
 
+; setup jump table
+
+
+; reference MEM_CALL_STACK_PTR to itself
 .std_rset CORE_REG_A, MEM_CALL_STACK_PTR
 .std_set MEM_CALL_STACK_PTR
 
+; reference MEM_ALLOC_PTR to itself
 .std_rset CORE_REG_A, MEM_ALLOC_PTR
 .std_set MEM_ALLOC_PTR
 
@@ -176,11 +196,6 @@ return_call_stack_jump:
       .std_set CORE_MEM_OUT
       .std_rset CORE_REG_A, '\n'
       .std_set CORE_MEM_CHR
-      .call_stack_jump words_0
-      .call_stack_jump words_1
-      .call_stack_jump words_2
-      .call_stack_jump words_3
-      .call_stack_jump words_4
       dbg
     .return_call_stack_jump
 
@@ -195,38 +210,6 @@ return_call_stack_jump:
 
 
 ; words
-  words_0:
-    ; name : "test"
-    push 40
-    push 2
-    .stack_transfer_alu
-    .std_alu CORE_ALU_ADD
-    tls
-  .return_call_stack_jump
-
-  words_1:
-    ; name : "meep"
-    push 32
-  .return_call_stack_jump
-
-  words_2:
-    ; name : "morp"
-    push 4875
-    push 8748
-    dbg
-  .return_call_stack_jump
-
-  words_3:
-    ; name : "zeep"
-    push 8777
-    dbg
-  .return_call_stack_jump
-
-  words_4:
-    ; name : "borg"
-    dbg
-  .return_call_stack_jump
-
 
 ; main
 main:
@@ -237,11 +220,18 @@ main:
 .org main
   push 0
   .call_stack_jump_cond_if_else conditions_if_0, conditions_else_0
-  .call_stack_jump words_0
+  push 40
+  push 2
+  .stack_transfer_alu
+  .std_alu CORE_ALU_ADD
+  tls
+  dbg
+  push 32
+  push 4875
+  push 8748
+  dbg
+  push 8777
+  dbg
   dbg
-  .call_stack_jump words_1
-  .call_stack_jump words_2
-  .call_stack_jump words_3
-  .call_stack_jump words_4
   dbg
 .std_stop
diff --git a/examples/testforth.fth b/examples/testforth.fth
index 359c111..abf624a 100644
--- a/examples/testforth.fth
+++ b/examples/testforth.fth
@@ -6,5 +6,5 @@
 
 \ 42 42 = debug if 69 . else 420 . then cr
 
-0 if 42 . cr test meep morp zeep borg debug else 69 . cr then
+0 if 42 . cr debug else 69 . cr then
 test debug meep morp zeep borg debug
diff --git a/henceforth/templates/default.asm b/henceforth/templates/default.asm
index bf74f32..73883b6 100644
--- a/henceforth/templates/default.asm
+++ b/henceforth/templates/default.asm
@@ -15,23 +15,36 @@
 .org prev
 .delete prev, diff
 
-.define_eval prev, OFFSET
-{%- for c in conditions %}
-  .bytes NULL
-  {% if !c.data.1.is_empty() %}.bytes NULL{% endif %}
-{% endfor %}
-.define_eval INDEX_CONDITIONS_SIZE, (OFFSET - prev)
-.org prev
-.delete prev
+; .define_eval prev, OFFSET
+; {%- for c in conditions %}
+;   .bytes CORE_U16_MAX{% if !c.data.1.is_empty() %}, CORE_U16_MAX{% endif %}
+; {%- endfor %}
+; .define_eval JUMP_TABLE_CONDITIONS_SIZE, (OFFSET - prev)
+; .org prev
+; .delete prev
 
-.debug INDEX_CONDITIONS_SIZE
+; .define_eval JUMP_TABLE_WORDS_SIZE, ({{ words.len() }} * 2)
 
-; index
-{%- for c in conditions %}
-  index_conditions_if_{{ c.id }}: 
-{% endfor %}
+; .define_eval MEM_JUMP_TABLE_LEN, (JUMP_TABLE_CONDITIONS_SIZE + JUMP_TABLE_WORDS_SIZE / 2)
+; .define_eval MEM_JUMP_TABLE_PTR, CORE_MEM_MEM
+; .define_eval MEM_JUMP_TABLE_END, (MEM_JUMP_TABLE_PTR + MEM_JUMP_TABLE_LEN)
 
-.define_eval MEM_LOOP_DEPTH, CORE_MEM_MEM
+; .debug MEM_JUMP_TABLE_LEN, MEM_JUMP_TABLE_PTR, MEM_JUMP_TABLE_END
+
+; ; jump table
+;   ; conditions
+; {%- for c in conditions %}
+;   jump_table_conditions_if_{{ c.id }}: .bytes 444
+;   {%- if !c.data.1.is_empty() %}
+;   jump_table_conditions_else_{{ c.id }}: .bytes 5498
+;   {%- endif %}
+; {%- endfor %}
+
+.define_eval MEM_JUMP_TABLE_LEN, 9
+.define_eval MEM_JUMP_TABLE_PTR, CORE_MEM_MEM
+.define_eval MEM_JUMP_TABLE_END, (MEM_JUMP_TABLE_PTR + MEM_JUMP_TABLE_LEN)
+
+.define_eval MEM_LOOP_DEPTH, (MEM_JUMP_TABLE_END + 1)
 .define_eval MEM_LOOP_I, (MEM_LOOP_DEPTH + 1)
 .define_eval MEM_LOOP_J, (MEM_LOOP_I + 1)
 
@@ -48,9 +61,14 @@
   tlr CORE_REG_A
 .endmacro
 
+; setup jump table
+
+
+; reference MEM_CALL_STACK_PTR to itself
 .std_rset CORE_REG_A, MEM_CALL_STACK_PTR
 .std_set MEM_CALL_STACK_PTR
 
+; reference MEM_ALLOC_PTR to itself
 .std_rset CORE_REG_A, MEM_ALLOC_PTR
 .std_set MEM_ALLOC_PTR