It's a simple circuit. You can use 74HC373 (or 273....hic, I don't understand clearly) to latch DATA from 89C52 to write or read data to/from IC RAM - 6264....
Hi dinesh322,
please take a look the attachment, it is a minimum system of AT89C51 and I using that board togather with EPROM Emulator. Hope this can help you.