Saturn Bios mod

Well folks. Saturn Hardware had several BIOS revisions. You guys have only one hacked BIOS which only works properly for a specific SET out of all motherboards that exist.

I know that the EARLY boards (DIP) BIOS don't work correctly with newer BIOSes for once.

One of the things that break is the MPEG card support.

 

No, we have all the bioses. The region free patch is identical across them all. Simple pattern match and replace = patch any saturn bios.

 

Still the recommendation stays. Use the SAME bios (patched) the unit came with.

 

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By broken MPEG card support I meant the Saturn completely freezes when you try to use it, be it a game which supports it (Wangnan Dead Heat for example) or try to watch a VCD.

In my case it's a early MB with a newer BIOS. BIOS is not modded. Hi-saturn bios (newer type).

 

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I no longer have access to the ROM chip. The actual board is a US VA 0.5...

I believe the BIOS is the second type because it was a SOP package and the system was a 21 pin drive with Hitachi MCU (the so called 64 pin I think).

 

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I burned Hi Saturn bions on a 27C160 EPROM and put it on a VA0.5 mobo. That broke movie card completely. New bios + old mobo = not working...

 

Did you try a later bios, but not for one of the special models?

I.e. the 1.01 bios from a regular saturn in the 0.5?

I never mix Hi/V-Saturn bioses with "normal" saturns.

 

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If the Hi-Saturn came with a built in vcd card - stands to reason it may have been done slightly differently and why that bios doesnt work on a normal saturn +vcd card.

 

It's NOT built in. It's a connected card. Same board as the JVC card but the BIOS ROM for the Hitachi card is different.

And like I said, the Hi-Saturn I took the bios from had a newer board with a different chipset than VA 0.5...

It was what you guys call "64 pin saturn".

Edit: And I am using the actual Hi-Saturn card too, by the way. The Saturn broke in a unfortunate crushing accident so the board was lost but I was able to salvage the movie card.

 

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