Supply PCI interface reflective memory card f

 Network Memory Network is mainly composed of a network memory card connected together via fiber, each computer on the network to insert a piece. Each node in the network to form a memory card, and shared memory for each node in the network memory card has a network memory online copy of the data to other nodes. Network Memory cards can be plugged into the motherboard of a variety of bus, such as VME, PCI, CompactPCI, PMC interface. Each network will occupy some memory card memory address, when you write data to any computer on the local network online memory card, the data and the corresponding memory address is broadcast to all other network online memory card and stored in the same location. So the computer writes data to its local network memory card after a very short time, online all computers can access the new data. Network memory card using a simple way to read and write, online data transmission network memory is pure hardware operations, regardless of the communication protocol of the network, the software requires only a few lines of code can be completed on the network memory card read and write operations, so It and other traditional networks such as Ethernet data transmission compared with lower latency, faster transfer speeds, easier to use and flexible operation, real-time systems to meet the requirements of rapid response cycle, and the use of other networks is difficult to meet this kinds of requirements. Reflective Memory is a LAN interconnection between computers provide efficient data transmission technology, strong real-time network designers have been increasingly using this technology through. Reflective Memory real-time LAN concept is very simple, is to design a network memory board memory to achieve communication in distributed memory systems, and there is no software overhead. Each piece of reflective insert a memory card on a computer with dual-port memory on the card, you can read both layers of software can also write these memory when data is written to a machine reflective memory card's memory, the reflective memory card automatically transmitted through the optical fiber connected to the other reflective memory card memory on the network, typically, only a few hundred nanoseconds of latency, memory all the reflections on the memory card will be written the same content. The members at the time of accessing the data, as long as access to local reflective memory card memory can be. VMIC Reflective Memory has the following main features: (1) high-speed and high-performance transmission speeds of up to 174M bytes / sec. Use of fiber, you can connect more nodes (up to 256 nodes), with high anti-jamming capability. The test results show that the data is written to the RAM from node to another reflective memory card, only less than 400 nanoseconds of latency. (2) easy to use reflective memory card to each node by the same machine to provide a backup data so that each node can concurrently access the same content does not differ from its own memory access reflective memory card when accessing memory. Data consistency between nodes is guaranteed by the reflective memory card, is transparent to the application software. Installation is simple, the reflective memory card inserted in an available slot on the motherboard, and then each host via flat cable or fiber optic network linked to. (3) independent of the operating system and processor reflective memory card can VME, use the PCI, PMC, Compact PCI, Multibus I and many buses can be ALPHA, Power PC, Macintosh, Pentium and other computer networks in real-time through reflective memory card connected together to form a cluster system. (4) determine the data transfer time in the reflective memory card, when data is written to the local board of reflective memory card's memory, they are simultaneously transmitted to other computers connected, there is no delay in software, hardware, latency is very small . Fiber optic Reflective Memory card only 400 nanoseconds when transferring data between nodes. This determined time delay for real-time applications designed to provide an effective guarantee. (5) economic, efficient model, that every transfer two data transmission, when the first error, use the second. Reflective Memory card data transmission rate is high, there is no way to be a multi-layer Ethernet protocol. Secondly, the reflective memory card using a simple, does not require the development of additional communications software, which will help improve system reliability, but also saves the cost of software development. Reflective Memory real-time network-based implementation mechanism is a set of reflective memory card dual-port memory boards. When data is stored to the reflective memory card, high-speed logic of this data will be automatically sent to the board along with the address of the other reflective memory card-board Internet, data transfer is completely driven by the hardware, without CPU intervention, the results of the next node in the Internet 400 ns will have the same data at the same address. Reflective Memory cards can be seen by all nodes share the online unit memory card, there are no access restrictions and arbitration, as each node access local memory as to achieve the data sharing between nodes. (1) data transmission reflective memory cards up to 256 can be connected to each other independent of the node, the maximum amount of shared memory can to 128M bytes of data transmission speeds of up to 174M / s, the distance between nodes can to 10KM. Reflective Memory card support interrupts, interrupt mechanism can be achieved by synchronizing node communication between machines. (2) using the interrupt synchronization VMIC Reflective Memory card support notification interrupt node receives data when the data is sent to a node, you can tell by interrupting the node. Reflective Memory card provides three interrupt, the user can define the priority of the interrupt, the interrupt with the amount and specific functions. (3) Error Management Technology reflective memory card error monitoring and reporting functions, by examining the data parity bit can be found if the data is wrong. Reflective Memory card provides redundant transmission