Hi Jacob, > I'm trying to enable the shell subsystem over the uart console on my board with no luck. It seems to be a problem in the board/test config for the ARC hsdk board. Watson is looking into it

Hi Justin, What version are you using? ARC support for direct interrupts was added in v2.1 (and note that Z_ARCH_IRQ_DIRECT_CONNECT was renamed to ARCH_IRQ_DIRECT_CONNECT). Regards, Ruud.