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Nonvolatile BIOS memory refers to a small memory on PC motherboards that is used to store BIOS settings. It is traditionally called CMOS RAM because it uses a volatile, low-power complementary metal–oxide–semiconductor (CMOS) SRAM (such as the Motorola MC146818 [1] or similar) powered by a small battery when system and standby power is off. [2]
Memory failure Steady, long beeps Power supply bad No beep Power supply bad, system not plugged in, or power not turned on No beep If everything seems to be functioning correctly there may be a problem with the 'beeper' itself. The system will normally beep one short beep. One long, two short beeps Video card failure
The power to the CPU(s) and RAM is maintained. Peripherals such as monitor and hard disk may be turned off. S2 CPU powered off. Dirty cache is flushed to RAM. S3 Commonly referred to as Standby, Sleep, or Suspend to RAM (STR): RAM remains powered, and RAM enters low power mode. Most peripherals are turned off. Fans are usually turned off.
The iMac G4 [a] is an all-in-one personal computer designed, manufactured, and sold by Apple Computer from January 2002 to August 2004. The computer is composed of a hemispheric base that holds the computer components, including the PowerPC G4 processor, with a flatscreen liquid-crystal display (LCD) mounted above.
Only trusted applications running in a TEE have access to the full power of a device's main processor, peripherals, and memory, while hardware isolation protects these from user-installed apps running in a main operating system. Software and cryptogaphic inside the TEE protect the trusted applications contained within from each other. [14]
In computer security, a cold boot attack (or to a lesser extent, a platform reset attack) is a type of side channel attack in which an attacker with physical access to a computer performs a memory dump of a computer's random-access memory (RAM) by performing a hard reset of the target machine.
The PowerBook G4 is a series of notebook computers manufactured, marketed, and sold by Apple Computer between 2001 and 2006 as part of its PowerBook line of notebooks. The PowerBook G4 runs on the RISC-based PowerPC G4 processor, designed by the AIM (Apple/IBM/Motorola) development alliance and initially produced by Motorola.
Intel responded by saying, "Intel does not put backdoors in its products, nor do our products give Intel control or access to computing systems without the explicit permission of the end user." [5] and "Intel does not and will not design backdoors for access into its products. Recent reports claiming otherwise are misinformed and blatantly false.