What (e.g., Tiny Tools, EasyJtag, FTDI) do you plan to use?
While specifically named jtagd (without the 'E'), the project jtaghal-apps defines a "jtagd" as a generic bridge from a JTAG adapter to TCP sockets. This is the "server" model. Given the specificity of "ejtagd," it is highly probable that someone either created a fork of jtagd specifically for MIPS EJTAG hardware, or they are using a custom in-house script that wraps ejtag_debug_usb or ejtagproxy into a persistent daemon state. ejtagd
"Rhythmic?"
To understand ejtagd (the software daemon), you must first understand the MIPS EJTAG Specification . Standard JTAG (IEEE 1149.1) was originally created for boundary-scan testing—checking if physical pins on an integrated circuit were soldered correctly. What (e