diff --git a/src/core.rs b/src/core.rs
index 5a0cbe5..8f6aaa7 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -15,9 +15,9 @@ pub(crate) enum InstructionResult {
 }
 
 pub struct Core {
-    x_regs: [RegValue; 32],
-    pc: Addr,
-    mem: MemConfig,
+    pub(crate) x_regs: [RegValue; 32],
+    pub(crate) pc: Addr,
+    pub(crate) mem: MemConfig,
 }
 
 impl Core {
@@ -73,11 +73,11 @@ impl Core {
         self.pc = pc;
     }
 
-    fn reg_read(&self, id: RegId) -> RegValue {
+    pub(crate) fn reg_read(&self, id: RegId) -> RegValue {
         self.x_regs[id as usize]
     }
 
-    fn reg_write(&mut self, id: RegId, value: RegValue) {
+    pub(crate) fn reg_write(&mut self, id: RegId, value: RegValue) {
         if id == 0 {
             return;
         }