Apparently the processor has its' own bios that can be accessed within the computers' bios, through a mode called "System Management Mode"- not recommended for inexperienced users.
"System management mode (SMM) is an operating mode entered when system management interrupt
SMI is asserted. The SMI is handled by a dedicated interrupt handler pointed to by processor model
specific registers. SMM is used for system control activities such as power management. These
activities are transparent to conventional operating systems (such as MS-DOS and Windows®
operating system). SMM is used by the BIOS and specialized low level device drivers. The code and
data for SMM are stored in the SMM memory area, which may be isolated from the main memory
accesses using special processor functions.
This chapter describes the SMM state save area, entry into and exit from SMM, exceptions and
interrupts in SMM, and memory allocation and addressing in SMM."
http://support.amd.com/us/Processor_TechDocs/32559.pdf