diff --git a/erlang/apps/sim/src/sim_boolean.erl b/erlang/apps/sim/src/sim_boolean.erl
index 4cd662e..056daac 100644
--- a/erlang/apps/sim/src/sim_boolean.erl
+++ b/erlang/apps/sim/src/sim_boolean.erl
@@ -56,6 +56,7 @@
         , handle_SETCAB/4
         , handle_SETCAM/4
         , handle_SETCM/4
+        , handle_SETCMB/4
         , handle_SETCMI/4
         , handle_SETCMM/4
         , handle_SETMB/4
@@ -635,6 +636,19 @@ handle_SETCMM(Core, Mem, IR, EA) ->
                           fun(Core1, Mem1) -> handle_SETCMM(Core1, Mem1, IR, EA) end)
   end.
 
+-spec handle_SETCMB(#core{}, sim_mem:mem(), IR :: word(), #ea{})
+      -> {#core{}, sim_mem:mem(), {ok, integer()} | {error, {module(), term()}}}.
+handle_SETCMB(Core, Mem, IR, EA) ->
+  case sim_core:c(Core, Mem, EA) of
+    {ok, CE} ->
+      AC = IR band 8#17,
+      Word = (bnot CE) band ((1 bsl 36) - 1),
+      handle_ANDB(Core, Mem, AC, EA, Word);
+    {error, Reason} ->
+      sim_core:page_fault(Core, Mem, ea_address(EA), read, Reason,
+                          fun(Core1, Mem1) -> handle_SETCMB(Core1, Mem1, IR, EA) end)
+  end.
+
 %% Miscellaneous ===============================================================
 
 ea_address(#ea{section = Section, offset = Offset}) ->
diff --git a/erlang/apps/sim/src/sim_core.erl b/erlang/apps/sim/src/sim_core.erl
index 014b6bf..34fd0a0 100644
--- a/erlang/apps/sim/src/sim_core.erl
+++ b/erlang/apps/sim/src/sim_core.erl
@@ -304,6 +304,7 @@ dispatch(Core, Mem, IR, EA) ->
     8#460 -> sim_boolean:handle_SETCM(Core, Mem, IR, EA);
     8#461 -> sim_boolean:handle_SETCMI(Core, Mem, IR, EA);
     8#462 -> sim_boolean:handle_SETCMM(Core, Mem, IR, EA);
+    8#463 -> sim_boolean:handle_SETCMB(Core, Mem, IR, EA);
     _ ->
       PC = (Core#core.pc_section bsl 18) bor Core#core.pc_offset,
       {Core, Mem, {error, {?MODULE, {dispatch, PC, IR, EA}}}}
diff --git a/erlang/apps/sim/test/sim_boolean_tests.erl b/erlang/apps/sim/test/sim_boolean_tests.erl
index 4cf2a82..b21d316 100644
--- a/erlang/apps/sim/test/sim_boolean_tests.erl
+++ b/erlang/apps/sim/test/sim_boolean_tests.erl
@@ -95,6 +95,7 @@
 -define(OP_SETCM, 8#460).
 -define(OP_SETCMI, 8#461).
 -define(OP_SETCMM, 8#462).
+-define(OP_SETCMB, 8#463).
 
 %% 2.4 Boolean Functions =======================================================
 
@@ -707,6 +708,17 @@ setcmm_test() ->
          [ {#ea{section = 1, offset = 8#200, islocal = false}, ?COMMA2(-1, 8#070707)} % C(1,,200) = -1,,070707
          ]).
 
+setcmb_test() ->
+  Prog =
+    [ {1, 8#100, ?INSN(?OP_SETCMB, 1, 0, 0, 8#200)}   % 1,,100/ SETCMB 1,200
+    , {1, 8#101, ?INSN_INVALID}                       % 1,,101/ <invalid>
+    , {1, 8#200, ?COMMA2(0, 8#707070)}                % 1,,200/ 0,,707070
+    ],
+  expect(Prog, [], {1, 8#101}, ?DEFAULT_FLAGS,
+         [ {#ea{section = 1, offset = 8#200, islocal = false}, ?COMMA2(-1, 8#070707)} % C(1,,200) = -1,,070707
+         , {#ea{section = 1, offset = 1, islocal = false}, ?COMMA2(-1, 8#070707)} % AC1 = -1,,070707
+         ]).
+
 %% Common code to run short sequences ==========================================
 
 expect(Prog, ACs, ExpectedPC, ExpectedFlags, ExpectedEs) ->