Hi, I'm using OpenOCD to run program on my fusesoc in an Altera Cyclone IV FPGA. I used http://opencores.org/or1k/ORCONF2013_Workshop_ORPSoC_On_DE0_Nano to get it work. They say I should use: telnet localhost 4444 halt; load_image //orconf2013/sw/timer/timer; reg npc 0x100; resume I was wondering what the command "reg npc 0x100" does. I'm new to this matter; can anyone explain it to me? Best regards

"reg npc 0x100" means that you set the NPC register (Next Program Counter) to address 0x100. This means that when you start running the CPU, it will read its first instruction from memory address 0x100. 0x100 is the default start address fro OpenRISC programs

Hope this helps,
Olof

Thanks for your help!