Electronic device and booting method

摘要

The present invention provides an electronic device including a write-once-then-read-only register, a chipset, a read-only memory, a flash memory and a central processor. The write-once-then-read-only register is arranged to store a determination value. The chipset is arranged to produce a CPU reset signal. The read-only memory is implemented in the chipset, and has a first memory block which corresponds to a predetermined address and is used to store a first instruction. The flash memory is coupled to the chipset, and has a second memory block which corresponds to the predetermined address and is used to store a second instruction. The central processor is arranged to determine the location of the predetermined address according to the CPU reset signal and the determination value.

主权项

1. An electronic device, comprising:
a write-once-then-read-only register, arranged to store a determination value; a chipset, arranged to produce a CPU reset signal; a read-only memory, implemented in the chipset, wherein the read-only memory has a first memory block corresponding to a predetermined address, and the first memory block is arranged to store a first instruction; a flash memory, coupled to the chipset, wherein the flash memory has a second memory block corresponding to the predetermined address, and the second memory block is arranged to store a second instruction; and a central processor, arranged to determine the location of the predetermined address according to the CPU reset signal and the determination value, wherein the central processor retrieves the first instruction when the determination value is a first predetermined determination value, and the central processor retrieves the second instruction when the determination value is a second predetermined determination value.