A service request interrupt router having an interrupt controller mapped to an Interrupt Service Provider (ISP) having virtual ISPs; Service Request Nodes (SRNs) configured to convert respective interrupt signals to corresponding service requests, wherein each of the SRNs is configured to direct its service request to one of the virtual ISPs; and an arbitrator configured to arbitrate among the virtual ISPs in a time-sliced manner, and for each of the virtual ISPs, to arbitrate which of the service requests directed thereto has a highest priority.