2 files changed, 23 insertions, 2 deletions

diff --git a/infra/arbiter.h b/infra/arbiter.h
index 5dd1647..74e37be 100644
--- a/infra/arbiter.h
+++ b/infra/arbiter.h
@@ -1,8 +1,7 @@
 #pragma once
 
+#include <array>
 #include <cassert>
-#include <optional>
-#include <utility>
 
 #include "infra/sim.h"
 
diff --git a/infra/bus.h b/infra/bus.h
new file mode 100644
index 0000000..e986174
--- /dev/null
+++ b/infra/bus.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <array>
+#include <cassert>
+
+#include "infra/sim.h"
+
+namespace infra {
+    template<typename T, unsigned int peers> struct shared_bus : public sim {
+        std::array<port<T>, peers> peerp;
+        port<T> *outp = nullptr;
+
+        void clock() {
+            for (unsigned int i = 0; i < peers; ++i) {
+                if (peerp[i].can_read()) {
+                    assert(outp->can_write());
+                    outp->write(peerp[i].read());
+                }
+            }
+        }
+    };
+}