diff --git a/src/mii_bank.c b/src/mii_bank.c
index 51fcf9c..be21ccc 100644
--- a/src/mii_bank.c
+++ b/src/mii_bank.c
@@ -14,6 +14,23 @@
 #include "mii.h"
 #include "mii_bank.h"
 
+void
+mii_bank_dispose(
+		mii_bank_t *bank)
+{
+	if (bank->alloc)
+		free(bank->mem);
+	bank->mem = NULL;
+	bank->alloc = 0;
+	if (bank->access) {
+		// Allow callback to free anything it wants
+		for (int i = 0; i < bank->size; i++)
+			if (bank->access[i].cb)
+				bank->access[i].cb(NULL, bank->access[i].param, 0, NULL, false);
+		free(bank->access);
+	}
+	bank->access = NULL;
+}
 
 void
 mii_bank_write(
diff --git a/src/mii_bank.h b/src/mii_bank.h
index 4c7c509..8daa928 100644
--- a/src/mii_bank.h
+++ b/src/mii_bank.h
@@ -11,6 +11,18 @@
 #include <stdbool.h>
 
 struct mii_bank_t;
+/*
+ * Bank access callback can be register with banks and will be called
+ * when a specific page (or pages) are read/written to.
+ * Parameter will be the bank specified, the 'real' address beind read/written
+ * and the 'param' passed when the callback was registered.
+ * The callback should return true if it handled the access, false otherwise.
+ * If it return true, the bank will not be accessed for this read/write.
+ *
+ * Note: the callback will be called once with bank == NULL when the bank
+ * is being disposed, this allow any memory allocated by the callback to be
+ * freed.
+ */
 typedef bool (*mii_bank_access_cb)(
 		struct mii_bank_t *bank,
 		void *param,
@@ -33,6 +45,9 @@ typedef struct mii_bank_t {
 	uint8_t		*mem;
 } mii_bank_t;
 
+void
+mii_bank_dispose(
+		mii_bank_t *bank);
 void
 mii_bank_write(
 		mii_bank_t *bank,