dual ported

dual ported

A term used to describe memory integrated circuits which can be accessed simultaneously via two independent address and data busses.

Dual ported memory is often used in video display hardware, especially in conjunction with Video Random Access Memory (VRAM). The two ports allow the video display hardware to read memory to display the contents on screen at the same time as the CPU writes data to other areas of the same memory. In single-ported memory these two processes cannot occur simultanteously, the CPU must wait, thus resulting in slower access times. Cycle stealing is one technique used to avoid this in single-ported video memory.
References in periodicals archive ?
PC-Hydra8 also features a JTAG debug port, an ISA/EISA host interface with block transfer capability, and 32 kbytes of RAM, which is dual ported between the host PC and DSPs.
The 1Gbit E-Disk 3F1 dual ported flash disk incorporates an industry standard Fibre Channel Single Connection Attachment 40-pin (FC-SCA-40) connector and internal logic compliance with FC-AL-2 and FC-PH topology and architecture specifications plus the Fibre Channel Protocol (FCP) for SCSI specifications and FC Private Loop Director Attach (FC-PLDA) technical report.
The drives provide system resilience via dual ported data paths all the way to the drives, Self-Monitoring, Analysis and Reporting Technology (SMART) capability, optimized sequential addressing features, Fibre Channel protocol native data integrity and error event handling capability.
The disks are dual ported between the redundant fibre loops.
But fibre disks are dual ported and that means a higher degree of fault tolerance and higher data availability.
The 3 port SPS 3GT, used on SATA dual ported adapter cards, provides a single ported SATA HDD with 2 simultaneously active host-facing ports (see Figure 1).
End users may tend to lean toward native Fibre Channel tape drives because they are dual ported which allows for the system design to include multiple redundant paths into the drives.
Remember that even a dual ported native FC drive is still only a single drive.
Monitor and Analyze Dual Ported SSDs Based on NVM Express and SCSI Express
SAN FRANCISCO, Sep 9, 2013 /PRNewswire/ -- Intel Developer Forum -- Teledyne LeCroy, the worldwide leader in protocol test solutions, today announced the availability of an SFF-8639 interposer card for analysis of dual ported Solid State Drives (SSDs) based on PCI Express[sup.