Patent ID: 8725959

Claim:
An apparatus comprising: a nonvolatile memory device comprising: a physical nonvolatile memory; and a controller in communication with the physical nonvolatile memory, wherein upon initialization, the controller is configured to open at least one write overlay window for an address space of the physical nonvolatile memory such that the at least one write overlay window implements a status and command interface for a host; wherein for a first address space within an address space of the physical nonvolatile memory, the controller is further configured to permit a direct read operation from the physical nonvolatile memory and to open a second write overlay window for a write operation upon initialization; and wherein for a second address space within the address space of the physical nonvolatile memory, the second address space being different from the first address space, the controller is further configured to open a first read overlay window for a read operation and to open a third write overlay window for a write operation upon initialization.