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As an example, assume the case of Wake-on-LAN. Traditionally, the OS controls Wake-on-LAN and must call third-party device drivers to enable support on a network card. With the HECI bus, the host is able to assert its request line (REQ#), the ME will assert its grant line (GNT#), and the host can send its message using its serial transmit signal.
Atomicity, consistency, isolation (sometimes integrity), durability is a transaction metric. When dealing with safety-critical systems, the acronym reliability, availability, maintainability and safety is frequently used. [citation needed] Dependability is an aggregate of availability, reliability, safety, integrity and maintainability.
It is also plug compatible with MS-DOS HIMEM.SYS, offering additional control parameters. [1] In Windows 3.1 and Windows 9x, there is also a command-line loadable version of HIMEM.SYS called XMSMMGR.EXE. It can load extended memory services after the system boots into the command prompt.
The final version was QEMM 97, which was compatible with Windows 95 and later Windows 98/ME [citation needed], but by this point, not only was DOS memory management no longer in high demand, but the remaining competitive DOS applications (including various GNU utilities and text editors) supported EMS, XMS, or DPMI - which reduced demand for ...
Drivers that have passed the Microsoft quality test are digitally signed by Microsoft. The Microsoft Hardware Compatibility Tests and the Driver Development Kit include reliability and stress tests. [7] A device driver that is not designed for a specific hardware component may allow another device to function. This is because the basic ...
INTEGRITY-178B is the DO-178B–compliant version of INTEGRITY. It is used in several military jets such as the B-2, [2] F-16, F-22, and F-35, and the commercial aircraft Airbus A380. [3] Its kernel design guarantees bounded computing times by eliminating features such as dynamic memory allocation.
While running a device driver in user space does not necessarily reduce the damage a misbehaving driver can cause, in practice it is beneficial for system stability in the presence of buggy (rather than malicious) drivers: memory-access violations by the driver code itself (as opposed to the device) may still be caught by the memory-management ...
In computing, an input–output memory management unit (IOMMU) is a memory management unit (MMU) connecting a direct-memory-access–capable (DMA-capable) I/O bus to the main memory. Like a traditional MMU, which translates CPU -visible virtual addresses to physical addresses , the IOMMU maps device-visible virtual addresses (also called device ...