1 files changed, 1 insertions, 0 deletions

diff --git a/isa/isa.h b/isa/isa.h
index 24ed108..1ad5a77 100644
--- a/isa/isa.h
+++ b/isa/isa.h
@@ -8,6 +8,7 @@ enum ctlreg {
     DATA_INSTRUCTION_FIELD_SAVED,   // (df_saved << 3) | if_saved
     HALTED,
     INT_ENABLE,                     // (int_enable_delay << 1) | int_enable
+    INT_PENDING,                    // only meaningful if interrupts disabled
     TT_BITS,                        // see below TT[IO]_* consts
     TT_INPUT_INT_ENABLE,
     TT_OUTPUT_INT_ENABLE,