METHOD FOR EXCHANGING A SYSTEM BOOT ROM WITH A NEW ONE

摘要

PURPOSE: A boot ROM exchange method is provided to present a convenience in exchanging a boot ROM of a system. CONSTITUTION: The method is applied to a system using a flash memory as its boot ROM. In an embodiment, The method is applied to a mobile communications system including a high-level block(or a system management center) and a low-level block(or a remote system). In the method, the remote system determines whether there is any board to need to update the content of its boot flash ROM. If so, the remote system registers the boot ROM content in the system management center. The system management center issues a boot flash ROM modification command to the board on the remote system, transferring packet data to the board. The board stores the packet data in a memory temporally. The board erases its boot flash ROM and programs the flash ROM with the packet data. The boards verifies that the boot ROM is correctly programmed. The board programs the flash ROM repeatedly until the boot ROM is correctly programmed.