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Quartus jtagd
**Quartus JTAGD** port (1309) is primarily used by *Altera* (now part of Intel) for remote programming, debugging, and hardware communication with FPGA devices via JTAG servers. This port facilitates interactions between Quartus software tools and programmable logic devices, enabling hardware development and maintenance workflows..
Port 1309 is associated with Altera Quartus JTAGD, a service used to provide remote access to FPGA devices utilizing the JTAG (Joint Test Action Group) interface. The JTAGD daemon listens on this port to facilitate programming, debugging, boundary scan operations, and hardware verification over a network connection from a Quartus design environment.
Altera's Quartus software suite relies on this service for communication with its development hardware, allowing engineers to download bitstreams, run diagnostics, and perform real-time control tasks. Since JTAG is a standardized protocol for test access, this port enables seamless integration across supported hardware within design and testing workflows.
Typically, the JTAGD service is run on engineering workstations or dedicated servers connected to the target FPGA via hardware interfaces (such as USB-Blaster). The use of port 1309 simplifies multi-user access and supports distributed development environments where hardware resources must be shared securely and efficiently.