diff --git a/projects/shoggoth/src/python/ichor/bootstrap.py b/projects/shoggoth/src/python/ichor/bootstrap.py
index 37e8baf..9806a67 100644
--- a/projects/shoggoth/src/python/ichor/bootstrap.py
+++ b/projects/shoggoth/src/python/ichor/bootstrap.py
@@ -89,7 +89,49 @@ OR2 = BOOTSTRAP.define_function(
 )
 
 _b = FuncBuilder()
-_b.write(isa.BREAK())
+# Capture args
+_x = _b.mark_argument()
+_y = _b.mark_argument()
+_z = _b.mark_argument()
+
+# Const
+_b.write(isa.IDENTIFIERC("bool"))
+_b.write(isa.TYPEREF())
+_bool_t = _b.mark_slot()
+
+_b.write(isa.SLOT(_bool_t))
+_b.write(isa.IDENTIFIERC("true"))
+_b.write(isa.ARMREF())
+_true_t = _b.mark_slot()
+
+_b.write(isa.SLOT(_bool_t))
+_b.write(isa.IDENTIFIERC("false"))
+_b.write(isa.ARMREF())
+_false_t = _b.mark_slot()
+
+# x: Bool, x: Bool -> Bool
+_true_l = _b.make_label()
+_b.write(isa.SLOT(_x))
+_b.write(isa.SLOT(_true_t))
+_b.write(isa.ATEST(_true_l))
+
+_b.write(isa.SLOT(_y))
+_b.write(isa.SLOT(_true_t))
+_b.write(isa.ATEST(_true_l))
+
+_b.write(isa.SLOT(_z))
+_b.write(isa.SLOT(_true_t))
+_b.write(isa.ATEST(_true_l))
+
+_b.write(isa.SLOT(_false_t))
+_b.write(isa.ARM(0))
+_b.write(isa.RETURN())
+
+_b.write(_true_l)
+_b.write(isa.SLOT(_true_t))
+_b.write(isa.ARM(0))
+_b.write(isa.RETURN())
+
 
 OR3 = BOOTSTRAP.define_function(
     f";or;{BOOL},{BOOL},{BOOL};{BOOL}",
diff --git a/projects/shoggoth/test/python/ichor/test_bootstrap.py b/projects/shoggoth/test/python/ichor/test_bootstrap.py
index 2754a1c..3f7151a 100644
--- a/projects/shoggoth/test/python/ichor/test_bootstrap.py
+++ b/projects/shoggoth/test/python/ichor/test_bootstrap.py
@@ -7,7 +7,7 @@ from ichor.bootstrap import (
     FALSE,
     NOT1,
     OR2,
-    OR2_INSTRS,
+    OR3,
     TRUE,
 )
 import pytest
@@ -32,10 +32,7 @@ def test_not(vm, stack, ret):
     [[FALSE, TRUE], [TRUE]],
     [[TRUE, TRUE], [TRUE]],
 ])
-def test_or(vm, stack, ret):
-    for idx, i in zip(range(512), OR2_INSTRS):
-        print(f"{idx:>3} {i}")
-
+def test_or2(vm, stack, ret):
     assert vm.run([
         isa.IDENTIFIERC(OR2),
         isa.FUNREF(),
@@ -43,6 +40,25 @@ def test_or(vm, stack, ret):
         isa.RETURN()
     ], stack = stack) == ret
 
+@pytest.mark.parametrize("stack,ret", [
+    [[FALSE, FALSE, FALSE], [FALSE]],
+    [[TRUE, FALSE, FALSE], [TRUE]],
+    [[FALSE, TRUE, FALSE], [TRUE]],
+    [[FALSE, FALSE, TRUE], [TRUE]],
+
+    [[TRUE, TRUE, FALSE], [TRUE]],
+    [[TRUE, FALSE, TRUE], [TRUE]],
+    [[FALSE, TRUE, TRUE], [TRUE]],
+    [[TRUE, TRUE, TRUE], [TRUE]],
+])
+def test_or3(vm, stack, ret):
+    assert vm.run([
+        isa.IDENTIFIERC(OR3),
+        isa.FUNREF(),
+        isa.CALLF(3),
+        isa.RETURN()
+    ], stack = stack) == ret
+
 
 # @pytest.mark.parametrize("stack,ret", [
 #     [[False, False], [False]],