Sometimes i rue so much, because i can not vanish from internet all information about those bios update. Once people have some problems with cart, first of all they dig some old thread about bios and trying to update it. Bios update process potentially dangerous and completely useless, if you not one of those customers for bought cart in first weeks. Some facts about bios:
1) I only made few tens carts with bios v1-v3, and they all were sold in first two weeks. I mean those carts extremely rare and most of them were updated back in the days
2) BIOS v1-v3 does not support old SD card under 4GB, but you still can use SDHC cards (any 4-32Gb sd cards)
3) To run bios update tool, you should have SDHC SD card, but if you already have SDHC card, then you don't actually need to update the bios, just use this SDHC card
4) Bios update can not fix any problems, except like include support of old small sd cards
I hope that anyone who dig internet in search of the bios will found this topic and save lot of own the time (:
#EDN8 does not require bios update and earth is not flat