diff --git a/erlang/apps/sim/src/sim_boolean.erl b/erlang/apps/sim/src/sim_boolean.erl
index 81d23f9..5ecd835 100644
--- a/erlang/apps/sim/src/sim_boolean.erl
+++ b/erlang/apps/sim/src/sim_boolean.erl
@@ -40,6 +40,7 @@
         , handle_ANDCMM/4
         , handle_ANDI/4
         , handle_ANDM/4
+        , handle_EQV/4
         , handle_IOR/4
         , handle_IORB/4
         , handle_IORI/4
@@ -457,6 +458,22 @@ handle_ANDCBB(Core, Mem, IR, EA) ->
                           fun(Core1, Mem1) -> handle_ANDCBB(Core1, Mem1, IR, EA) end)
   end.
 
+%% EQV - Equivalence with AC
+
+-spec handle_EQV(#core{}, sim_mem:mem(), IR :: word(), #ea{})
+      -> {#core{}, sim_mem:mem(), {ok, integer()} | {error, {module(), term()}}}.
+handle_EQV(Core, Mem, IR, EA) ->
+  case sim_core:c(Core, Mem, EA) of
+    {ok, CE} ->
+      AC = IR band 8#17,
+      CA = sim_core:get_ac(Core, AC),
+      Word = (bnot (CE bxor CA)) band ((1 bsl 36) - 1),
+      sim_core:next_pc(sim_core:set_ac(Core, AC, Word), Mem);
+    {error, Reason} ->
+      sim_core:page_fault(Core, Mem, ea_address(EA), read, Reason,
+                          fun(Core1, Mem1) -> handle_EQV(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 237b4a5..3cbe979 100644
--- a/erlang/apps/sim/src/sim_core.erl
+++ b/erlang/apps/sim/src/sim_core.erl
@@ -289,6 +289,7 @@ dispatch(Core, Mem, IR, EA) ->
     8#441 -> sim_boolean:handle_ANDCBI(Core, Mem, IR, EA);
     8#442 -> sim_boolean:handle_ANDCBM(Core, Mem, IR, EA);
     8#443 -> sim_boolean:handle_ANDCBB(Core, Mem, IR, EA);
+    8#444 -> sim_boolean:handle_EQV(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 8c6f3ae..c918306 100644
--- a/erlang/apps/sim/test/sim_boolean_tests.erl
+++ b/erlang/apps/sim/test/sim_boolean_tests.erl
@@ -80,6 +80,7 @@
 -define(OP_ANDCBI, 8#441).
 -define(OP_ANDCBM, 8#442).
 -define(OP_ANDCBB, 8#443).
+-define(OP_EQV, 8#444).
 
 %% 2.4 Boolean Functions =======================================================
 
@@ -524,6 +525,19 @@ andcbb_test() ->
          , {#ea{section = 1, offset = 1, islocal = false}, ?COMMA2(-1, 0)} % AC1 = -1,,0
          ]).
 
+%% EQV - Equivalence with AC
+
+eqv_test() ->
+  Prog =
+    [ {1, 8#100, ?INSN(?OP_MOVEI, 1, 0, 0, 8#707070)} % 1,,100/ MOVEI 1,707070
+    , {1, 8#101, ?INSN(?OP_EQV, 1, 0, 0, 8#200)}      % 1,,101/ EQV 1,200
+    , {1, 8#102, ?INSN_INVALID}                       % 1,,102/ <invalid>
+    , {1, 8#200, ?COMMA2(0, 8#333333)}                % 1,,200/ 0,,333333
+    ],
+  expect(Prog, [], {1, 8#102}, ?DEFAULT_FLAGS,
+         [ {#ea{section = 1, offset = 1, islocal = false}, ?COMMA2(-1, 8#343434)} % AC1 = -1,,343434
+         ]).
+
 %% Common code to run short sequences ==========================================
 
 expect(Prog, ACs, ExpectedPC, ExpectedFlags, ExpectedEs) ->