diff --git a/erlang/apps/sim/src/sim_core.erl b/erlang/apps/sim/src/sim_core.erl
index fce7201..4afe08c 100644
--- a/erlang/apps/sim/src/sim_core.erl
+++ b/erlang/apps/sim/src/sim_core.erl
@@ -273,6 +273,8 @@ dispatch(Core, Mem, IR, EA) ->
     8#421 -> sim_boolean:handle_ANDCMI(Core, Mem, IR, EA);
     8#422 -> sim_boolean:handle_ANDCMM(Core, Mem, IR, EA);
     8#423 -> sim_boolean:handle_ANDCMB(Core, Mem, IR, EA);
+    8#424 -> next_pc(Core, Mem); % SETA = no-op
+    8#425 -> next_pc(Core, Mem); % SETAI = no-op
     _ ->
       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 fa207b2..7dbed3a 100644
--- a/erlang/apps/sim/test/sim_boolean_tests.erl
+++ b/erlang/apps/sim/test/sim_boolean_tests.erl
@@ -64,6 +64,8 @@
 -define(OP_ANDCMI, 8#421).
 -define(OP_ANDCMM, 8#422).
 -define(OP_ANDCMB, 8#423).
+-define(OP_SETA, 8#424).
+-define(OP_SETAI, 8#425).
 
 %% 2.4 Boolean Functions =======================================================
 
@@ -334,6 +336,20 @@ andcmb_test() ->
          , {#ea{section = 1, offset = 1, islocal = false}, ?COMMA2(0, 8#030303)} % AC1 = 0,,030303
          ]).
 
+seta_test() ->
+  Prog =
+    [ {1, 8#100, ?INSN(?OP_SETA, 0, 0, 0, 0)}         % 1,,100/ SETA 0,0
+    , {1, 8#101, ?INSN_INVALID}                       % 1,,101/ <invalid>
+    ],
+  expect(Prog, [], {1, 8#101}, ?DEFAULT_FLAGS, []).
+
+setai_test() ->
+  Prog =
+    [ {1, 8#100, ?INSN(?OP_SETAI, 0, 0, 0, 0)}        % 1,,100/ SETAI 0,0
+    , {1, 8#101, ?INSN_INVALID}                       % 1,,101/ <invalid>
+    ],
+  expect(Prog, [], {1, 8#101}, ?DEFAULT_FLAGS, []).
+
 %% Common code to run short sequences ==========================================
 
 expect(Prog, ACs, ExpectedPC, ExpectedFlags, ExpectedEs) ->