1 files changed, 4 insertions, 2 deletions

diff --git a/isa/checker.h b/isa/checker.h
index d70997f..332c483 100644
--- a/isa/checker.h
+++ b/isa/checker.h
@@ -3,6 +3,7 @@
 #include <array>
 #include <map>
 
+#include "io/model.h"
 #include "isa/isa.h"
 
 struct funcmem {
@@ -41,10 +42,11 @@ struct checker {
     unsigned int mq = 0;
     unsigned int pc = 00200;
     std::array<unsigned int, NUM_CTLREGS> ctlregs;
+    iomodel &system;
     instruction_context inst;
-    bool halted = false;
     funcmem mem;
-    checker()
+    checker(iomodel &system)
+        : system(system)
     {
         ctlregs.fill(0);
     }