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InfiniKey-CPS2

nobody said:
There's no hex file for a PIC with null keys.

It does work if I install a battery and inject null keys with the Arduino, but the point was getting rid of said battery.
Click to expand...
I see. If it were me and I didn't feel like chasing the ghost in the machine I would either battery it, or try to see if someone can compile the hex with a null key... surely that would be easy if the source code is available.
 
skate323k137 said:
try to see if someone can compile the hex with a null key... surely that would be easy if the source code is available.
Click to expand...
I'm not that knowledgeable but I try to improve myself every day. :)
I guess I could compare two hex files using an editor and spot where the keys are stored in the file (hopefully they're no compression or weird data manipulation going on).
That's a good challenge, I like it.
 
Here is my progress.

First I compared two hex files selected randomly (19xx and avsph) :

1638707744331.png


Only 4 lines are different (2 to 5).

Now the question is, how to make the link with the keys?

{ 0x07,0x00,0x02,0x40,0x00,0x0A,0x04,0xC2,0xA4,0x02,0x02,0x20,0x04,0x3C,0x2F,0xEB,0xE0,0x63,0x81,0xC0}; //19xx
{ 0x0F,0x00,0x02,0x40,0x00,0x08,0x04,0xC0,0xB1,0x20,0x79,0xAB,0xE9,0xC6,0xCF,0x09,0x42,0x5B,0x52,0x38}; //avsph

[EDIT]
I think I got it:

19xx

:10000000FB2B00308A000408840A8207003407347E
:1000100000340234403400340A340434C234A4348A
:1000200002340234203404343C342F34EB34E034D2
:1000300063348134C03461346A3465345F34663487

avsph

:10000000FB2B00308A000408840A820700340F3476
:10001000003402344034003408340434C034B13481
:1000200020347934AB34E934C634CF340934423423
:100030005B345234383461346A3465345F34663446

So now I need to:
- replace those 20 values by 0xFF
- understand how is calculated the checksum for each line (it's probably well documented somewhere in the datasheet or on the web)
 
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Well it didn't take long to understand the checksum calculation:

:10000000FB2B00308A000408840A820700340F3476
= 100 - (10 + 00 + 00 + 00 + FB + 2B + 00 + 30 + 8A + 00 + 04 + 08 + 84 + 0A + 82 + 07 + 00 + 34 + 0F + 34) => discarding MSB
= 100 - 8A
= 76

Now I'm going to handcraft a new file with null (0xFF) keys.
 
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Here's what I got for lines 2 to 5:

:10000000FB2B00308A000408840A82070034FF3486
:10001000FF34FF34FF34FF34FF34FF34FF34FF3448
:10002000FF34FF34FF34FF34FF34FF34FF34FF3438
:10003000FF34FF34FF3461346A3465345F3466342E

Which gives the following hex file:

:020000040000FA
:10000000FB2B00308A000408840A82070034FF3486
:10001000FF34FF34FF34FF34FF34FF34FF34FF3448
:10002000FF34FF34FF34FF34FF34FF34FF34FF3438
:10003000FF34FF34FF3461346A3465345F3466342E
:02004000723418
:1006B0000234831605111F1185109F108312051136
:1006C00085108512051408008316851205111F1167
:1006D00085109F1005101F1041308312A100EE30CD
:1006E000A000A00B712BA10B712B000059238312CA
:1006F000051505100B30A1006230A000A00B7E2B69
:10070000A10B7E2B000003308312A1009730A000C4
:10071000A00B882BA10B882B8D2B03308312A100FB
:100720009730A000A00B922BA10B922B972B03309C
:100730008312A1009730A000A00B9C2BA10B9C2B37
:10074000A12B8312A201A3012208013E84000120F3
:10075000A0000130A1002308073C013EB12B03108B
:10076000A10DFF3E031DAF2B210820050319BB2B54
:1007700083128516BD2B8312851285140330A100C8
:100780009730A000A00BC22BA10BC22BC72B83124A
:1007900085100330A1009730A000A00BCD2BA10B3A
:1007A000CD2BD22B01308312A0002008A3070830E4
:1007B0002302031CA42B0130A0002008A207143040
:1007C0002202031CA32B051105140330A10097304E
:1007D000A000A00BE92BA10BE92BEE2B83128510B7
:1007E0004130A100EE30A000A00BF42BA10BF42BA4
:0E07F00000005923FA2B5823A4008301642B28
:02400E00D431AB
:00000001FF

Going to test it in about minutes.
 
It works people! :thumbsup:

A big thank to Eduardo Cruz and @aje_fr for their work.

Now if a new game/revision/set of keys is discovered we can easily handcraft a new hex file using the method above without knowing anything about writing code for PIC devices.

On a side note, if installing a PIC with NULL keys you won't have to worry about discharging the capacitors from time to time anymore.
I know I know, why using a phoenix version when you can restore keys for the OG code? There are a least two reasons to me:
- phoenix versions let you choose the region
- some hacks/conversions use null keys
 
I'm trying to repair a CPS2 grey board set I've received, but I'll keep it on topic as much as I can. If an Infinikey was soldered on and taken off a ST board, what would it do if the board had Avalaunch chips already (no battery)? I think this may a root cause of the board not working at all (purple screen).
 
nem said:
No Infinikey and no battery with a decrypted program rom set should result in a working board. Have you tried shorting EXC5? Maybe it's still holding the keys in memory.
Click to expand...
I -think- I did with a screwdriver across all three points for a minute, and that didn’t help, but there’s a little dodgy soldering I may need to touch up from the uninstall. I also wasn’t using clips or have gone through the tester chip yet (next steps), but I was thinking the same about holding keys in memory. Just making sure I wasn’t missing anything key related.
 
JoeAwesome said:
I -think- I did with a screwdriver across all three points for a minute, and that didn’t help, but there’s a little dodgy soldering I may need to touch up from the uninstall. I also wasn’t using clips or have gone through the tester chip yet (next steps), but I was thinking the same about holding keys in memory. Just making sure I wasn’t missing anything key related.
Click to expand...
I've always used exc1 to short and clear any stored corrupted key information. It may be the same as shorting exc5 but thought it worth mentioning.
 
I tried shorting both, but I’m still getting a pink screen. At this point, I need to find a known working setup to test, but thanks for the suggestions.
 
skate323k137 said:
Suicide tester rom time?
Click to expand...
Tried it. Still pink, bro. Raised voltages to just above 5v; used clips; tried with an uncased B board; reseated the C board. Nothing changed. Checked continuity on a couple unbent pins and where work was done installing/unstalling the infinikey, and everything beeped well. Unfortunately, I don’t know anyone with a gray set, locally, but it’s my best idea at this point to rule out one or both boards.
 
undamned said:
I can make you a special one. 19XX EUR dump did not exist when original CPS2 Infinikeys were produced. Next production run will include it and a few more keys for other revisions not previously dumped.
-ud
Click to expand...
What's the status of the Infinikeys? Sent a msg a while ago looking for a 10 pack but never heard anything back. Still looking for that 10 pack!
 
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Hey everyone,

I'm attempting to install an infinikey on a Capcom Sports Club (Euro) pcb. I have installed infinikeys successfully on the other cps2 boards in my collection. However, I am unclear where to begin on this one as it is unique with 2 tiers. Any help would be greatly appreciated.
 

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Max7153 said:
Hey everyone,

I'm attempting to install an infinikey on a Capcom Sports Club (Euro) pcb. I have installed infinikeys successfully on the other cps2 boards in my collection. However, I am unclear where to begin on this one as it is unique with 2 tiers. Any help would be greatly appreciated.
Click to expand...

The add on board is additional ROMs for CSC - you get a smaller one on SSF2X

Pop the top board off and install Infinikey on B board as per normal :)
 
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