-void m48t59_write (m48t59_t *NVRAM, uint32_t val);
-uint32_t m48t59_read (m48t59_t *NVRAM);
-void m48t59_set_addr (m48t59_t *NVRAM, uint32_t addr);
+void m48t59_write (m48t59_t *NVRAM, uint32_t addr, uint32_t val);
+uint32_t m48t59_read (m48t59_t *NVRAM, uint32_t addr);