Hi Grant, On Thu, May 23, 2019 at 04:09:34PM -0700, Grant Grundler wrote: > > AFAIK, parisc never used firmware to route IRQ lines. For starters, > the CPUs never had an IRQ input and always used messages (equivalent > to MMIO writes) directed at a CPUs EIEM register. I think you mean EIRR here? Regards Sven