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twistedsymphony

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I recently picked up a Raiden II PCB, it has a location on the PCB for a backup battery, I've seen picture of other Raiden II PCBs equipped with this battery. Though on my board there's no indication that it ever had one; the solder points where one would be installed are perfectly clean.

41983236_302184783914969_1974839025997489769_n.jpg

High scores aren't saved. Does anyone know if this battery is responsible for saving high scores? If so does anyone know of a suitable replacement battery or if any other components are needed to make it work? Searching around I've found conflicting information as to whether adding a battery will allow high scores to be saved and no information on the actual battery specs.
 

deibit

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Mine has a perfect working battery, removing the battery has no effect on the scores whatsoever. Scores are simply not saved.

I actually doubt that the battery has a real function in RaidenII, I just removed it to avoid potential issues, everything works as it should without the battery as well.

Battery is a Maxell ER6C 3.6V

It doesn't plug in with solder points, but with the standard ER6C battery connector.

qHFoHdd.jpg
 
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twistedsymphony

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damn... Whats the purpose of the battery if it runs without it and it's not for the scores?

games that don't save high scores aggravate me. X(
 

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As far as i know, a bit of code in a custom device is lost when the battery dies, and then the game never saves scores after that. Even if you add the battery back. Sorta like CPS2, but less dramatic, as the game still works.
 

deibit

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Mmm I have read about that feature in some other forum, but until I see (at least) one Raiden II PCB able to save scores, Im going to consider this an urban legend (call me skeptical) :)
 

twistedsymphony

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As far as i know, a bit of code in a custom device is lost when the battery dies, and then the game never saves scores after that
any idea if that device is dumped or could be restored?
 

twistedsymphony

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Nope, I meant that mine never saved scores.
If what Asure said is true, it's possible that your battery died or was replaced at some point before you took posession of the PCB and thats why the scores didn't save.

How do they build those High Score save kits for games like Pac Man and Donkey Kong? maybe we can implement similar solutions on these newer PCBs that have no excuse for needing a battery, or simply don't save at all.
 

deibit

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it's very possible that someone disconnected the battery before I got the PCB. I only know that the battery is of the original type and it was in good working order before I unplugged it.

The battery is connected to the PCB with a simple connector, it's very easy to unplug it. It's a little bit strange that there is some kind of self destructive mechanism built around something that can be easily unplugged (but I've seen worse)

I have never seen (or heard of) a RaidenII PCB able to save HiScores anyway (but it could be, of course)
 

Asure

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Mmm I have read about that feature in some other forum, but until I see (at least) one Raiden II PCB able to save scores, Im going to consider this an urban legend (call me skeptical) :)
I fully agree with you but remembered this nugget from back when we got perfect Raiden 2 emulation because of the Seibu COP work being nearly completely emulated. If i recall, the custom holding the key was also on Zero Team, and a hack set exists to reprogram the key if you have a replaced a dead with a good battery on board.

For Raiden 2 it seems to be lost forever. As batteries died, so did the code in the SEI 251 (sram?)
Problem is i never saw the actual code/key(?), so not sure if this is the stuff of urban legends. But still, many people recall the game saving scores.

https://github.com/mamedev/mame/blob/master/src/mame/drivers/raiden2.cpp contains no details on this rumour.

Perhaps @rtw might know more, his name is mentioned in connection to this in the great halls of shmups.org forums :)
 

deibit

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my simplistic interpretation. is that Seibu shared the same pcb platform between different games. Some used the battery to save the keys (Zero Team for instance) and in some games the battery wasn't used for anything (Raiden II)

But of course I have no scientific evidence, that's why I'm agnostic and not atheist, in this case :)
 

opt2not

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If someone came up with a high score save kit for Raiden II and Raiden DX I would buy it in a heartbeat.
 
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