MEMORY MANAGEMENT APPARATUS

摘要

A second memory (130) holds data on a segment unit basis. An allocation control circuit (120) sets a buffer space as a logical address. The buffer space is formed as an aggregation of one or more segments. A state holding circuit (126) holds the correspondence relationship between the buffer space and the segments as segment allocation information. An address conversion circuit (128) converts a logical address to a physical address with reference to the segment allocation information. A segment queue holds an empty segment and a buffer queue holds an empty buffer. The state holding circuit (126) comprises a plurality of register groups each including a plurality of segment registers. The register group is made to correspond to any of a plurality of the buffer spaces. The segment register has a set range number for specifying a predetermined range of the logical address range in the relevant buffer space.