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New CPS2 Multigame Firmware with Key Writing!!!!!!

The chip doing the real security is DL-1525. The key writing data passes through DL-1827(CIF) and goes to DL-1525(SPA). If traces are broken due to corrosion or pins on either DL-1827 or DL-1525 are loose key writing will not work
 
l_oliveira said:
The chip doing the real security is DL-1525. The key writing data passes through DL-1827(CIF) and goes to DL-1525(SPA). If traces are broken due to corrosion or pins on either DL-1827 or DL-1525 are loose key writing will not work
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Incredibly unlikely to have damage that far (opposite side of board from battery) and not know whether "it might work." I've maybe seen 1 or 2 boards where acid damaged reached that far, and the damage between the battery and DL-1525 was impressive.
-ud
 
These chips happen to fail internally by having the bonding wires disconnect from either the lead frame or from the die.
 
l_oliveira said:
These chips happen to fail internally by having the bonding wires disconnect from either the lead frame or from the die.
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Anytime "corrosion" is used in the context of CPS2, you can bet people are thinking about a battery problem :) Was this discovered during Eduardo Cruz' CPS2 research?

Mitsurugi-w said:
The ones that would not work I never got to work. No problems with any other revision B-board. I've only had 3 or 4 out of maybe 20 that have not worked for me. All -4 pcbs.
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Out of morbid curiosity, I went through all my boards and labeled the cases with PCB revs. For the sake of this discussion, I did the following on 5 unique Rev. 4 boards:

1) Power up and make sure working
2) Wipe key and make sure not working
3) Re-write key and make sure working again

All 5 Rev. 4 boards passed fine. No retries or anything funky. If you are curious about the titles, they were: Vampire Hunter (J), Super SFII (U), Jyangoku(J), SFA2(U), and Super Muscle Bomber(J).
-ud
 
Regarding chips internal corrosion, these chips happen to fail internally by having the pins disconnect from either the lead frame or from the die.
220px-DIP_package_sideview.PNG


I should have posted a visual cue. When the bonding wire fails the pin becomes disconnected and the effect is exactly the same as a broken trace.


Edit:
The corrosion problem is particularly acute with the CPS1 customs CPS-A-01 and CPS-B-xx which are made by Ricoh. Konami boards which have plenty of Fujitsu made chips are also affected with such a problem. Of course, besides the DL-1525 which is a Motorola made chip all other chips on the CPS2 B board are made bu Fujitsu. (why you think they have that big Fujitsu logo on Rolento's stage in SFZ2?)
 
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Hello,

Sorry to be a pain, but I just want to make sure I have this right.

I just got my Multi Boot in the mail about a week ago and hooked it up today. Works great with decrypted games and it's friggin awesome!

So if I want to run encrypted games, I just need to add the 4 wires because this should already have the newest firmware? And at that point I wont need the reset wire to get the games to reset automatically once they are loaded?

Thanks!
 
Good morning everyone ! Guys , should i solder these wires even if on the heads they are others than JST Nh connector ? I use insted of these JST connector, 4 dupont wires ... like in below images ! Thank you !
Picture.jpg

Picture1.jpg
Done ! For one of the first solder wires , the kit still working ... Now the games starts right away was flashed :whistling: :saint:
Update :
photo 1-2.JPG

photo 3-2.JPG
 
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You solder the other ends to the multi kit, you don't need to solder the wires to the header on the B board. As long as the DuPont connectors hold on ok I don't see it being an issue
 
The new keywriting FW works like a charm! I know its a bit late but (and I might have said it before) thanks for making this possible!

Installed a new fan in my cps2 multisetup today and I noticed my CPS2 mobo has a pimped Z80 :)
(I know they can run in regular z80 mode, just a bit suprised)
 

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bytestorm said:
The new keywriting FW works like a charm! I know its a bit late but (and I might have said it before) thanks for making this possible!

Installed a new fan in my cps2 multisetup today and I noticed my CPS2 mobo has a pimped Z80 :)
(I know they can run in regular z80 mode, just a bit suprised)
Click to expand...
What is a Z80 and what difference does a pimped one make and how is it "pimped" over a regular one?
 
Processor used for sound on CPS2. Only a standard Z80 required, but his has a Kabuki variant (extra security poppy and some other stuff). No benefit in this application, just interesting.
-ud
 
Ok, interesting. Thought it was something more special than that, lol
 
undamned said:
Processor used for sound on CPS2. Only a standard Z80 required, but his has a Kabuki variant (extra security poppy and some other stuff). No benefit in this application, just interesting.
-ud
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From the factory or installed by a previous owner? If from factory that's very interesting
 
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