diff --git a/src/mem.rs b/src/mem.rs
index 3ee2791..28498b9 100644
--- a/src/mem.rs
+++ b/src/mem.rs
@@ -13,9 +13,9 @@ const PAGE_SIZE: usize = 4096;
 
 #[derive(Clone)]
 pub struct MemConfig {
-    ram: Arc<Ram>,
-    ram_start: PageNum,
-    devices: Box<[DeviceEntry]>,
+    pub ram: Arc<Ram>,
+    pub ram_start: PageNum,
+    pub devices: Box<[DeviceEntry]>,
 }
 
 impl MemConfig {