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Message Signaled Interrupts (MSI) are a method of signaling interrupts, using special in-band messages to replace traditional out-of-band signals on dedicated interrupt lines. While message signaled interrupts are more complex to implement in a device, they have some significant advantages over pin-based out-of-band interrupt signalling, such ...
MacBook Air (M1, 2020) On November 10, 2020, Apple announced an updated MacBook Air with an Apple-designed M1 system-on-a-chip (SoC), launched alongside an updated Mac Mini and 13-inch MacBook Pro as the first Macs with Apple's new line of custom ARM-based Apple silicon processors. [6] Apple released the device a week later, on November 17.
MII has two signal interfaces: A Data interface to the Ethernet MAC, for sending and receiving Ethernet frame data. A PHY management interface, MDIO, used to read and write the control and status registers of the PHY in order to configure each PHY before operation, and to monitor link status during operation.
MAC—Mandatory Access Control; MAC—Media Access Control; MAC—Message authentication code; MANET—Mobile Ad-Hoc Network; MAN—Metropolitan Area Network; MAPI—Messaging Application Programming Interface; MBCS—Multi Byte Character Set; MBD—Model-Based Design; MBR—Master Boot Record; Mb—Megabit; MB—Megabyte; Mbps—Megabits per ...
In a computer, an interrupt request (or IRQ) is a hardware signal sent to the processor that temporarily stops a running program and allows a special program, an interrupt handler, to run instead. Hardware interrupts are used to handle events such as receiving data from a modem or network card, key presses, or mouse movements.
The System Management Controller (SMC) is a subsystem of Intel and Apple silicon-based Macintosh computers. It is similar in function to the older SMU or PMU of PowerPC based Macintosh computers. [1] [2]
The functions below are usually provided by the super I/O if they are on the motherboard: A floppy-disk controller [2] An IEEE 1284-compatible parallel port [2] (commonly used for printers) One or more 16C550-compatible serial port UARTs [2] Keyboard controller for PS/2 keyboard and/or mouse
The transmit clock signal is always provided by the MAC on the TXC line. The receive clock signal is always provided by the PHY on the RXC line. [citation needed] Source-synchronous clocking is used: the clock signal that is output (by either the PHY or the MAC) is synchronous with the data signals. This requires the PCB to be designed to add a ...