In some early microprocessor designs, memory management was performed by a separate integrated circuit such as the VLSI VI475 (1986), the Motorola 68851 (1984) used with the Motorola 68020 CPU in the Macintosh II, or the Z8015 (1985) used with the Zilog Z8000 family of processors.
En deseños anteriores de microprocesadores, a xestión de memoria era feita por un circuíto integrado separado como o do VLSI VI475 (1986), o Motorola 68851(1984) usado coa CPU do Motorola 68020 no Macintosh II, ou o Z8015 (1985) usado coa familia de procesadores Zilog Z8000.