One or more methods and systems of prioritizing access of physical memory space to bus compliant devices in a computing device is presented. Prioritization is based on real time or non-real time device functionality. In one embodiment, the method of accessing physical memory space for use by a bus compliant device comprises receiving a memory request from the device through a data bus. In addition, the method comprises comparing addresses of the memory request to a range of memory addresses stored in a memory request comparator. In one embodiment, the system for prioritizing the access of physical memory space in response to memory requests comprises one or more device and/or bus drivers, and a memory request comparator. The one or more device and/or bus drivers facilitates implementation of address ranges within said memory request comparator for one or more bus compliant devices.