A system interface controller for enabling a computing appliance to read and write data to a fixed or removable non-volatile memory device includes a peripheral component interface having one or more disk and or bus controller registers, a flash memory controller, a random access memory controller, and a random access memory chip having one or more flash address management tables connected to the random access memory controller. In one embodiment, the system interface controller is modular and is installable to a card form factor supporting the non-volatile memory.