diff --git a/erlang/apps/sim/src/sim_boolean.erl b/erlang/apps/sim/src/sim_boolean.erl
index 5ecd835..47e1799 100644
--- a/erlang/apps/sim/src/sim_boolean.erl
+++ b/erlang/apps/sim/src/sim_boolean.erl
@@ -41,6 +41,7 @@
         , handle_ANDI/4
         , handle_ANDM/4
         , handle_EQV/4
+        , handle_EQVI/4
         , handle_IOR/4
         , handle_IORB/4
         , handle_IORI/4
@@ -474,6 +475,14 @@ handle_EQV(Core, Mem, IR, EA) ->
                           fun(Core1, Mem1) -> handle_EQV(Core1, Mem1, IR, EA) end)
   end.
 
+-spec handle_EQVI(#core{}, sim_mem:mem(), IR :: word(), #ea{})
+      -> {#core{}, sim_mem:mem(), {ok, integer()} | {error, {module(), term()}}}.
+handle_EQVI(Core, Mem, IR, EA) ->
+  AC = IR band 8#17,
+  CA = sim_core:get_ac(Core, AC),
+  Word = (bnot (CA bxor EA#ea.offset)) band ((1 bsl 36) - 1),
+  sim_core:next_pc(sim_core:set_ac(Core, AC, Word), Mem).
+
 %% 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 3cbe979..ade3ccd 100644
--- a/erlang/apps/sim/src/sim_core.erl
+++ b/erlang/apps/sim/src/sim_core.erl
@@ -290,6 +290,7 @@ dispatch(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);
+    8#445 -> sim_boolean:handle_EQVI(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 c918306..a8fb096 100644
--- a/erlang/apps/sim/test/sim_boolean_tests.erl
+++ b/erlang/apps/sim/test/sim_boolean_tests.erl
@@ -81,6 +81,7 @@
 -define(OP_ANDCBM, 8#442).
 -define(OP_ANDCBB, 8#443).
 -define(OP_EQV, 8#444).
+-define(OP_EQVI, 8#445).
 
 %% 2.4 Boolean Functions =======================================================
 
@@ -538,6 +539,16 @@ eqv_test() ->
          [ {#ea{section = 1, offset = 1, islocal = false}, ?COMMA2(-1, 8#343434)} % AC1 = -1,,343434
          ]).
 
+eqvi_test() ->
+  Prog =
+    [ {1, 8#100, ?INSN(?OP_MOVEI, 1, 0, 0, 8#707070)} % 1,,100/ MOVEI 1,707070
+    , {1, 8#101, ?INSN(?OP_EQVI, 1, 0, 0, 8#333333)}  % 1,,101/ EQVI 1,333333
+    , {1, 8#102, ?INSN_INVALID}                       % 1,,102/ <invalid>
+    ],
+  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) ->