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Some computer designs have used non-button cell batteries, such as the cylindrical "1/2 AA" used in the Power Mac G4 as well as some older IBM PC compatibles, or a 3-cell nickel–cadmium (Ni–Cd) CMOS battery that looks like a "barrel" (common in Amiga and older IBM PC compatibles), which serves the same purpose. These motherboards often have ...
This is often called the CMOS battery or BIOS battery. The original IBM AT through to the PS/2 range, used a relatively large primary lithium battery, compared to later models, to retain the clock and configuration memory. [2] These early machines required the backup battery to be replaced periodically due to the relatively large power consumption.
The MacBook Air is a line of Mac laptops made by Apple Inc. In 2020, Apple stopped using Intel processors in the Air and switched to using their own Apple silicon M-series chips . In the current product line, the MacBook Air is Apple's entry-level laptop, situated below the performance range MacBook Pro , and is currently sold with 13-inch and ...
CMOS inverter (a NOT logic gate). Complementary metal–oxide–semiconductor (CMOS, pronounced "sea-moss ", / s iː m ɑː s /, /-ɒ s /) is a type of metal–oxide–semiconductor field-effect transistor (MOSFET) fabrication process that uses complementary and symmetrical pairs of p-type and n-type MOSFETs for logic functions. [1]
Non-volatile random-access memory (NVRAM) is random-access memory that retains data without applied power. This is in contrast to dynamic random-access memory (DRAM) and static random-access memory (SRAM), which both maintain data only for as long as power is applied, or forms of sequential-access memory such as magnetic tape, which cannot be randomly accessed but which retains data ...
Computer memory that can retrieve stored data after a power supply has been turned off and back on is called non-volatile. It is an array of floating-gate transistors individually programmed by an electronic device that supplies higher voltages than those normally used in digital circuits.
Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto configuration (e.g. Plug and Play and hot swapping), and status monitoring.
MacBook Air (Mid 2013) MacBook Air (Early 2014) 1.3–1.4 2×256 3 — 2 Yes Yes June 2013 March 2015 iMac (Late 2013) 1.4 2×256 3 — 2 Yes Yes June 2014 October 2015 Mac mini (Late 2014) 1.4–2.8 2×256 3 — 2 Yes Yes October 2014 October 2018 Core i7 ULT (2-core) MacBook Air (Mid 2013) MacBook Air (Early 2014) 1.7 2×256 4 — 2 Yes Yes ...