This page will hopefully help users to quickly get up and running, to do useful things in System Console.
Starting System Console
From SOPC Builder, click Tools --> Launch System Console
From Nios II 8.0 Command Shell, type "system-console"
If you have the Quartus Project handy, try "system-console -jdi=<quartus_proj>.jdi". This will give System Console more information about the JTAG nodes in your system.
Reading and Writing Memory with a Nios II Processor
This assumes that only one Nios II Processor exists in the system. If one or more Nios II's or a JTAG Avalon Master exists, then in Step 1 you might have to change the list index to get the correct master.
0. <From System Console shell>
set nios [ lindex [ get_service_paths master ] 0 ] - might need to change the index number if there are > 1 masters.
open_service master $nios
processor_stop $nios - the Nios must be in debug mode to access memory