Programming EPCS devices with JTAG

To my knowledge these blocks share the internal ASMI interface block ... however, it is possible to still allow these to coexist. There is an option in the serial flash loader interface to share the ASMI connection. This currently would require editing the Verilog or VHDL source for the Nios ASMI block and reconnecting it through the serial flash loader interface.

Of course the option of just flashing the serial flash loader image would allow JTAG communication as indicated in the documentation. For them to coexist you would have to share the ASMI connection as indicated above.

I would recommend contacting Altera Applications ( https://mysupport.altera.com/eservice/ ) and requesting this be allowed automatically. This could be an enhancement to the Nios or ALTASMI_PARALLEL block.