diff --git a/erlang/apps/sim/src/sim_boolean.erl b/erlang/apps/sim/src/sim_boolean.erl
index 2ec4555..4cd662e 100644
--- a/erlang/apps/sim/src/sim_boolean.erl
+++ b/erlang/apps/sim/src/sim_boolean.erl
@@ -57,6 +57,7 @@
         , handle_SETCAM/4
         , handle_SETCM/4
         , handle_SETCMI/4
+        , handle_SETCMM/4
         , handle_SETMB/4
         , handle_SETMI/4
         , handle_SETMM/4
@@ -622,6 +623,18 @@ handle_SETCMI(Core, Mem, IR, EA) ->
   Word = (bnot EA#ea.offset) band ((1 bsl 36) - 1),
   sim_core:next_pc(sim_core:set_ac(Core, AC, Word), Mem).
 
+-spec handle_SETCMM(#core{}, sim_mem:mem(), IR :: word(), #ea{})
+      -> {#core{}, sim_mem:mem(), {ok, integer()} | {error, {module(), term()}}}.
+handle_SETCMM(Core, Mem, IR, EA) ->
+  case sim_core:c(Core, Mem, EA) of
+    {ok, CE} ->
+      Word = (bnot CE) band ((1 bsl 36) - 1),
+      handle_ANDM_1(Core, Mem, EA, Word);
+    {error, Reason} ->
+      sim_core:page_fault(Core, Mem, ea_address(EA), read, Reason,
+                          fun(Core1, Mem1) -> handle_SETCMM(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 510652d..014b6bf 100644
--- a/erlang/apps/sim/src/sim_core.erl
+++ b/erlang/apps/sim/src/sim_core.erl
@@ -303,6 +303,7 @@ dispatch(Core, Mem, IR, EA) ->
     8#457 -> sim_boolean:handle_ORCAB(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);
     _ ->
       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 baecfbc..4cf2a82 100644
--- a/erlang/apps/sim/test/sim_boolean_tests.erl
+++ b/erlang/apps/sim/test/sim_boolean_tests.erl
@@ -94,6 +94,7 @@
 -define(OP_ORCAB, 8#457).
 -define(OP_SETCM, 8#460).
 -define(OP_SETCMI, 8#461).
+-define(OP_SETCMM, 8#462).
 
 %% 2.4 Boolean Functions =======================================================
 
@@ -696,6 +697,16 @@ setcmi_test() ->
          [ {#ea{section = 1, offset = 1, islocal = false}, ?COMMA2(-1, 8#070707)} % AC1 = -1,,070707
          ]).
 
+setcmm_test() ->
+  Prog =
+    [ {1, 8#100, ?INSN(?OP_SETCMM, 1, 0, 0, 8#200)}   % 1,,100/ SETCMM 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
+         ]).
+
 %% Common code to run short sequences ==========================================
 
 expect(Prog, ACs, ExpectedPC, ExpectedFlags, ExpectedEs) ->