Sega Saturn FRAM Save Memory Upgrade Install Guide

Sega Saturn FRAM mod will replace the volatile SRAM chip inside the Saturn with a non volatile FRAM chip. This will prevent the internal saves from being lost when the internal battery dies.

The process should be the same for all Saturn revisions but has not been verified yet.

1. Desolder the SRAM chip from the Saturn mainboard (UPD43257B or UM62257M)
2. Solder in the FRAM chip to replace it
3. Do not solder pins 22 and 28 of the FRAM chip
4. Connect pin 22 to a ground point on the mainboard
5. Connect pin 28 to a different +5V supply on the mainboard such as a neighbouring chip's +5V pin

VA0

SRAM chip is located on the top side and lower right of the Saturn mainboard.

VA1

SRAM chip is located on the underside and bottom left of the Saturn mainboard.