Moonwalker pcb resurrection

[Belike]

I'M planning to bring the Moonwalker pcb back to life, just wanted to ask you guys, that do you have any experience with this resurrection kit from
http://www.segaresurrection.com/

[Superully]

your moonwalker pcb has acid damage, right? if that's the case, then my guess is the resurrection kit won't do the trick!

[Belike]

I didn't remember any acid damage, I removed that big battery, it was also clear under that.
I will post some pics in the afternoon!

[Laschek]

Was there a real battery?? Those Sega boards normally have a big epoxy block containing CPU/Ram/Battery all in one package. It's a lithium battery which is not supposed to be leaking AFAIK.

[kroustibat]

Never use sega ressurection service, so it's interesting (i've a cotton 2 suicidal pcb). Charles mcdonald from mameteam seems to know that guy, so i'd go with sega ressurection too :p

[Belike]

I'm pretty sure it's ok!





Under the "battery":


And that monster itself(dirt on the right side):

[kroustibat]

the pcb looks clean, and a gud candidate for ressurection

[DarthNuno]

Interesting  I think my Turbo Out Run died in that way... I may try this service too, thanks for the link and hope this will bring back to life ... your Moonwalker 

[Robinholland]

Is it not posible to use the roms from mame and a standard 68000 ?

[Belike]

I've ordered the kit today, keep you informed if it works....

[level42]

Is it not posible to use the roms from mame and a standard 68000 ?

As far as I can see, this is all that the kit is. However, not sure what's in the ROMs. The site says that MAME is doing the decryption so you'd expect the MAME roms to be decrypted. A pretty weird way to do it IMHO. I would have guessed making encryption-free ROMS would be easier, but MAME is there for emulating the real stuff as good as possible so that's probably why they did it this way.

[Laschek]

Most likely they use decrypted bootleg roms from Mame. For more info on that subject I recommend this website: http://www.arcadecollecting.com/dead/dead.html (The dead battery society). Some time ago I ressurected a Shinobi Board with "their" help (it's not a real society ) and it worked fine.
If I had a Moonwalker PCB I would have tried out which Roms work and offered the service for half the cost 

[kroustibat]

Let's get technical , technicaaaaaaaal (old 80's song) ;-)

In the past , i've investigate this encryption to produce the good roms myself (i got a good knowledge of 68000, thanks to my megadrive dev.)

this protection is really nasty and surely that's why mame took so long to break it. In fact there's a key in a volatile area kept alive thanks to the battery. At runtime, the program use a special 68000 op code (a cmp.w if i remember well) to switch 'on the fly' the decryption key, so depending of the program flow the decryption is different. This means that you have to run the program in the right order to get the right key switching context.

So that's why decrypting is hard, coz that means you have to run every branches of the program in the right order. And you can not do that by just playing the game as, you'll not be sure to pass every branches. Another problem is that only the program is crypted , the data array (tile maps,..) are not ! but they are mixed in the same rom, so that make it harder to produce a clean decrypted set as you have to make the difference between code and data.

I'd curious how segaressurection worked it out

[kroustibat]

Most likely they use decrypted bootleg roms from Mame. For more info on that subject I recommend this website: http://www.arcadecollecting.com/dead/dead.html (The dead battery society). Some time ago I ressurected a Shinobi Board with "their" help (it's not a real society ) and it worked fine.
If I had a Moonwalker PCB I would have tried out which Roms work and offered the service for half the cost 

i think that 40$ for the spare 68000 and the other roms chips, and everything decrypted is a bargain (knowing the pain in the ass to decrypt the rom).

[level42]

Most likely they use decrypted bootleg roms from Mame. For more info on that subject I recommend this website: http://www.arcadecollecting.com/dead/dead.html (The dead battery society). Some time ago I ressurected a Shinobi Board with "their" help (it's not a real society ) and it worked fine.
If I had a Moonwalker PCB I would have tried out which Roms work and offered the service for half the cost 

i think that 40$ for the spare 68000 and the other roms chips, and everything decrypted is a bargain (knowing the pain in the ass to decrypt the rom).

I agree that's a very fair price.