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Raiden 1 won't save high scores when powered off.
Haze:
--- Quote from: James391 on March 11, 2013, 01:36:48 am ---Really? I got a Raiden 2 board and cab as a lcd conversion/rebuild project, and today I dropped the 2 board in the running cab to give it a whirl. Ran great, but I was disappointed to find that even with a fresh battery it would not save the scores. I though for sure that it would since it has the battery and all.
Sounds like you have what I'm after. Once I finish up the 2 I am going to have to track down the DX. Love the series.
--- End quote ---
Not really sure what the battery is for on R2/DX.
For Zero Team (a very similar board) the battery is used to keep the sprite decryption keys alive, if it dies you end up with scrambled sprites and have to either
a) run an (official? leaked?) suicide repair kit (supported in MAME)
b) replace the program roms with a set where the encryption key is uploaded every time
c) replace the graphic roms with non-encrypted versions.
Raiden 2 however always uploads the encryption keys, so the battery seems pointless. Maybe there are earlier undumped revisions which don't and are prone to the same graphic suicide issues, but I've never seen one, nor seen reports of it happening.
opt2not:
--- Quote from: Haze on March 11, 2013, 03:26:50 am ---
--- Quote from: James391 on March 11, 2013, 01:36:48 am ---Really? I got a Raiden 2 board and cab as a lcd conversion/rebuild project, and today I dropped the 2 board in the running cab to give it a whirl. Ran great, but I was disappointed to find that even with a fresh battery it would not save the scores. I though for sure that it would since it has the battery and all.
Sounds like you have what I'm after. Once I finish up the 2 I am going to have to track down the DX. Love the series.
--- End quote ---
Not really sure what the battery is for on R2/DX.
For Zero Team (a very similar board) the battery is used to keep the sprite decryption keys alive, if it dies you end up with scrambled sprites and have to either
a) run an (official? leaked?) suicide repair kit (supported in MAME)
b) replace the program roms with a set where the encryption key is uploaded every time
c) replace the graphic roms with non-encrypted versions.
Raiden 2 however always uploads the encryption keys, so the battery seems pointless. Maybe there are earlier undumped revisions which don't and are prone to the same graphic suicide issues, but I've never seen one, nor seen reports of it happening.
--- End quote ---
I've read that Seibu was thinking about adding encryption to it's R2/RDX PCBs and using the battery to power it up (like how CPS2 motherboard works with the "suicide" battery) but never did fully implement it.
James391:
Welp, guess I'm SOL on the high scores. I will just have to build a custom scoreboard for my gameroom-in-progress.
Thanks for all of the replies.
Haze:
--- Quote from: opt2not on March 11, 2013, 03:40:45 pm ---
--- Quote from: Haze on March 11, 2013, 03:26:50 am ---
--- Quote from: James391 on March 11, 2013, 01:36:48 am ---Really? I got a Raiden 2 board and cab as a lcd conversion/rebuild project, and today I dropped the 2 board in the running cab to give it a whirl. Ran great, but I was disappointed to find that even with a fresh battery it would not save the scores. I though for sure that it would since it has the battery and all.
Sounds like you have what I'm after. Once I finish up the 2 I am going to have to track down the DX. Love the series.
--- End quote ---
Not really sure what the battery is for on R2/DX.
For Zero Team (a very similar board) the battery is used to keep the sprite decryption keys alive, if it dies you end up with scrambled sprites and have to either
a) run an (official? leaked?) suicide repair kit (supported in MAME)
b) replace the program roms with a set where the encryption key is uploaded every time
c) replace the graphic roms with non-encrypted versions.
Raiden 2 however always uploads the encryption keys, so the battery seems pointless. Maybe there are earlier undumped revisions which don't and are prone to the same graphic suicide issues, but I've never seen one, nor seen reports of it happening.
--- End quote ---
I've read that Seibu was thinking about adding encryption to it's R2/RDX PCBs and using the battery to power it up (like how CPS2 motherboard works with the "suicide" battery) but never did fully implement it.
--- End quote ---
Which is basically what Zero Team does, except it's graphic encryption not program encryption.
I have a feeling it's probably just a leftover from plans to do that, but based on the number of people having issues with Zero Team they changed their minds / quickly removed it. Wasn't needed anyway, to this day neither game has ever been emulated or bootlegged so that's 20 years and counting...