![]() Instead of duplicating it, I combined the region-free and the original U/E 1.01a BIOS file ( copy /B eur v1 regionfree.bin + Bios Saturn 1.01a (U). Usually, the region-free BIOS file is duplicated, byte-swapped and then written onto the chip ( Macronix MX29F800TMC-90). There is an excellent tutorial by mmmonkey you can find the needed files there as well. The region-free BIOS has the region lockout removed and allows you to play (original) games from all regions. Explanation / preparing the flash memory chip But first, some explanation (parts are taken from the previous article). I removed and replaced them in a single session. ![]() Sega Saturn PAL VA3 mainboard Region-free BIOS and FRAM modificationīoth chips are next to each other on the lower left on the back of the mainboard. After I replaced the power cable of the disc drive and did some tests, I was ready to modify the mainboard. ![]()
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January 2023
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