Honored Contributor
Honored ContributorI try several nios configurations with small memory needs (reset_vector is in flash in each configurations) and external reset :
- onchip memory only without jtag -> nios & hard boot without problem - onchip memory only with jtag&debug -> nios & hard boot without problem - sram only without jtag&debug -> nios don't boot - onchip mem (.exception) + sram (all others) + jtag/debug -> nios don't boot. So I guess there is no problem with jtag. unless quartus bugs are random, i guess there is no problem with quartus too. The problem seems to be the sram. Hardware could be loaded in sram from flash but not the nios. The nios could be loaded by IDE (with reset_vector in sram) but doesn't support reset... I will try to downgrade quartus to 9.1 sp1 (unless you think that 10.0 sp1 is better) and maybe use signal tap probes after if no new solutions.
