dev is the serial device, as for target remote speed allows you to specify the linespeed and. With 2 additional clicks, load them back onto your PC for assessment. Remote PC-resident AMD EB29K board, attached over serial lines.
Also, it is possible to debug both the client-side code (which is at the end translated to JavaScript) and server-side code at the same time, in Eclipse, in combination with GWT Hosted Mode (with embedded light Tomcat) and one full-blown web server (servlet container or AS) dedicated for back-end stuff (for EJBs, Spring, JNDI, etc - this server hosts the stuff that can't be hosted by lightweight embedded Tomcat in GWT Hosted Mode). 's not that bad as long as you have proper environment for debugging.