Search results
Results from the WOW.Com Content Network
The main difference between System V shared memory (shmem) and memory mapped I/O (mmap) is that System V shared memory is persistent: unless explicitly removed by a process, it is kept in memory and remains available until the system is shut down. mmap'd memory is not persistent between application executions (unless it is backed by a file).
Memory-mapped I/O is preferred in IA-32 and x86-64 based architectures because the instructions that perform port-based I/O are limited to one register: EAX, AX, and AL are the only registers that data can be moved into or out of, and either a byte-sized immediate value in the instruction or a value in register DX determines which port is the source or destination port of the transfer.
MapQuest (stylized as mapquest) is an American free online web mapping service. It was launched in 1996 as the first commercial web mapping service. [1] MapQuest's competitors include Apple Maps, Here, and Google Maps. [2] [3]
A memory-mapped file is a segment of virtual memory [1] that has been assigned a direct byte-for-byte correlation with some portion of a file or file-like resource. This resource is typically a file that is physically present on disk, but can also be a device, shared memory object, or other resource that an operating system can reference through a file descriptor.
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses ...
In computer science, a memory map is a structure of data (which usually resides in memory itself) that indicates how memory is laid out. The term "memory map" has different meanings in different contexts. It is the fastest and most flexible cache organization that uses an associative memory. The associative memory stores both the address and ...
version of mapping attributes a Point of Interest (e.g. hospital marked as "under construction" is providing health care services) Blockchain can be used as integrity check of alterations [30] or digital signature [31] can be used to mark a certain version as "quality assured" by the institution that signed a map as digital file or digital content.
Géoportail - government run public service mapping, covers the whole French territory; ViaMichelin - World maps, city maps, driving directions, Michelin-starred restaurants, hotel booking, traffic news and weather forecast with ViaMichelin. Germany "Geoportal.de", by the Federal Agency for Cartography and Geodesy (BKG). Hong Kong