1 files changed, 2 insertions, 1 deletions

diff --git a/sim/control.sv b/sim/control.sv
index 7808f61..ddd6401 100644
--- a/sim/control.sv
+++ b/sim/control.sv
@@ -18,6 +18,7 @@ typedef enum
     { HALT
     , SET_UIP_COND
     , NOCOND
+    , ICOND
     , OUTADDR
     , OUTDATA
     } CtrlBit;
@@ -33,7 +34,7 @@ assign abus = ctrl[OUTADDR] ? constant : {(BUS_BITS){1'bZ}};
 assign dbus = ctrl[OUTDATA] ? constant : {(BUS_BITS){1'bZ}};
 
 bit cond;
-assign cond = (dbus != 0) || ctrl[NOCOND];
+assign cond = ((dbus != 0) || ctrl[NOCOND]) ^ ctrl[ICOND];
 
 always @(posedge clk) begin
     if (reset) begin