2 files changed, 3 insertions, 4 deletions

diff --git a/isa/ctlreg.def b/isa/ctlreg.def
index c9eab05..d490073 100644
--- a/isa/ctlreg.def
+++ b/isa/ctlreg.def
@@ -4,5 +4,4 @@ REG(HALTED)
 REG(INT_ENABLE)                     // (int_enable_delay << 1) | int_enable
 REG(INT_PENDING)                    // only meaningful if interrupts disabled
 REG(TT_BITS)                        // see TT[IO]_* consts in isa/isa.h
-REG(TT_INPUT_INT_ENABLE)            // (status_enable << 1) | (int_enable)
-REG(TT_OUTPUT_INT_ENABLE)
+REG(TT_INT_ENABLE)                  // (status_enable << 1) | (int_enable)
diff --git a/isa/decode.cpp b/isa/decode.cpp
index f183c1f..c11679c 100644
--- a/isa/decode.cpp
+++ b/isa/decode.cpp
@@ -153,9 +153,9 @@ instruction_context decode(unsigned int dfifb, unsigned int pc, unsigned int bit
                             };
                             break;
                         case 5:
-                            // KIE set TT_INPUT_INT_ENABLE to the low bit of the accumulator
+                            // KIE set TT_INT_ENABLE to the low bit of the accumulator
                             inst.need_read_acc = true;
-                            inst.write_ctlreg = TT_INPUT_INT_ENABLE;
+                            inst.write_ctlreg = TT_INT_ENABLE;
                             inst.ef = [](auto &ctx) {
                                 ctx.ctlval = ctx.acc.value() & 3;
                             };