MS5 MVS Cartridge Clean or Repair?

ConstitutionalCommando

New Challenger
Joined
Feb 23, 2022
Posts
69
For those of you with experience troubleshooting MVS carts, judging by these photos, can anyone tell if this cartridge needs to be cleaned OR repaired? I don't have it in my possession and I'm sure that someone has experience with this type of graphical glitch. MS5 is the last game in the series that I need to complete my collection and I've been searching for this cartridge at a decent price. Rolling the dice on this one.

44B00E9F-AA65-4FA4-BDE4-444B80F57995.jpeg
B2646C74-DFDA-46B5-8952-0D89953EE94E.jpeg
F18EB2C6-231E-4039-A631-B1D4EE2B1D0B.jpeg
 

BIG BEAR

SHOCKbox Developer,
20 Year Member
Joined
Dec 14, 2001
Posts
8,230
It looks like the CMC needs to be replaced on the CHAFIO pcb...good gamble.
BB
 

ConstitutionalCommando

New Challenger
Joined
Feb 23, 2022
Posts
69
So these chips can't be purchased new, and only salvaged from existing carts? I assume that the CMC chip has to come from the last 5 carts in the below list or any of the carts in the complete list, or only 90G06C7050 carts?

Uses NEO-CMC 90G06C7042 or 90G06C7050

  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 070 - Zupapa -
  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 251 - The King Of Fighters 99
  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 252 - Ganryu
  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 253 - Garou
  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 254 - Strikers 1945 Plus
  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 255 - Prehistoric Isle 2
  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 256 - Metal Slug 3
  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 259 - Bang Bead
  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 260 - Nightmare in the Dark
  • pcb version (1999.6.14) - 1999 - 90G06C7042 - 261 - Sengoku 3
  • pcb version (1999.6.14) - 1999 - 90G06C7050 - 008 - Jockey Grand Prix
  • pcb version (1999.6.14) - 1999 - 90G06C7050 - 257 - The King Of Fighters 2000
  • pcb version ( REV1.0 ) - 2001 - 90G06C7050 - 262 - The King Of Fighters 2001
  • pcb version (SNK2002) - 2002 - 90G06C7050 - 263 - Metal Slug 4
  • pcb version (1999.6.14) - 1999 - 90G06C7050 - 264 - Rage Of the Dragons
  • pcb version (1999.6.14) - 1999 - 90G06C7050 - 265 - The King Of Fighters 2002
  • pcb version (1999.6.14) - 1999 - 90G06C7050 - 266 - Power Instinct - Matrimelee
  • pcb version (1999.6.14) - 1999 - 90G06C7050 - 267 - Pochi and Nyaa
  • pcb version (2003.7.24) - 2003 - 90G06C7050 - 268 - Metal Slug 5
  • pcb version (2003.7.24) - 2003 - 90G06C7050 - 269 - SNK Vs Capcom Chaos
  • pcb version (2003.7.24) - 2003 - 90G06C7050 - 270 - Samurai Spirits Zero
  • pcb version (2003.7.24) - 2003 - 90G06C7050 - 271 - The King Of Fighters 2003
  • pcb version (2003.7.24) - 2003 - 90G06C7050 - 270 - Samurai Spirits Zero Special
 

BIG BEAR

SHOCKbox Developer,
20 Year Member
Joined
Dec 14, 2001
Posts
8,230
Your particular CMC would be salvaged from the following:
Jockey Grand Prix
The King of Fighters 2000
The King of Fighters 2001
Metal Slug 4
Rage of the Dragons
The King of Fighters 2002
Matrimelee
Pochi and Nyaa
Metal Slug 5
SNK vs. Capcom - SVC Chaos
Samurai Shodown V
The King of Fighters 2003
Samurai Shodown V Special

There is only two realistic options here..
BB
 
Joined
Jan 2, 2012
Posts
2
Hello,
I know this is too late, but have you solved this issue? What was your solution? Well, in case you did not solve it yet, let me give you 5 cents of contribution.
In my eyes, the CMC50 on this Metal Slug MVS is working perfectly!

Here are the facts:

1- IF the M1 ROM had any damaged bit from data lines or address lines, the CMC would be unable to decrypt anything, not even the part of the Graphics or the HUD Layer of the screen, so the M1 is perfect.

2- The CMC doesn't care what is passed on the bus to the NEOGEO after the decryption takes place, if there is any noise in the address lines or data lines the CMC will keep working unless the M1 fails, or the power fails, and whatever the CMC receives from the C roms it will pass on. You can see some of the decryption on screen (LOGO or Score), so this is another proof the CMC is working, else you would not recognize anything. So I assume some of the Cs are causing the problem. The decryption is diffuse and is split over all C ROMs. For example, the S1 is exactly located at the end of C7 / C8 after decryption, but because the encryption is diffused the data from this S1 is spread over all C Roms to be more precise.

3- I would suggest reflowing all the C ROMS (from C1 to C8)

4- Also Verify that every resistor in front of the CMC chip is measuring approximately 561 OHMs (from R3 to R34) ignore R2 because is for another purpose and has a different value of 161 OHMS.

5- Could also be the case that some pin of the CMC that makes communication with the C Roms gets damaged by something falling over it or the cartridge falling on the ground or even bad welding that decayed over time and needs to be reflowed on the CMC itself, but this would require having technical skills.


Let me know...
 

BIG BEAR

SHOCKbox Developer,
20 Year Member
Joined
Dec 14, 2001
Posts
8,230
You are absolutely correct.
We always hope that it's the CMC before having to replace a C rom because you just can't burn and replace with a dip eprom.You have to use a dip adapter and smt size chip equivalent.
Thank you for your input.
BB
 

Neodogg

Dogg-Father,
20 Year Member
Joined
Nov 27, 2002
Posts
5,588
Your particular CMC would be salvaged from the following:
Jockey Grand Prix
The King of Fighters 2000
The King of Fighters 2001
Metal Slug 4
Rage of the Dragons
The King of Fighters 2002
Matrimelee
Pochi and Nyaa
Metal Slug 5
SNK vs. Capcom - SVC Chaos
Samurai Shodown V
The King of Fighters 2003
Samurai Shodown V Special

There is only two realistic options here..
BB
So I need to stock pile JGP and KoF ‘00 for future sacs…
 

BIG BEAR

SHOCKbox Developer,
20 Year Member
Joined
Dec 14, 2001
Posts
8,230
So I need to stock pile JGP and KoF ‘00 for future sacs…
Not stock pile ,just a backup because those titles are usually available and inexpensive and the chip doesn't fail that often.
I already have a lot of CMC chips myself..just don't know what's bad and good BUT I do know I have some good ones.
BB
 
Joined
Jan 2, 2012
Posts
2
You are absolutely correct.
We always hope that it's the CMC before having to replace a C rom because you just can't burn and replace with a dip eprom.You have to use a dip adapter and smt size chip equivalent.
Thank you for your input.
BB
Yeah, I have been aware of it for a long time.

The SNK didn't care about people fixing their boards (right to repair) kkkkkk.

In my opinion, the solution would be this. ( https://www.ebay.com/itm/163949600208 )
But somebody needs to verify how this company works because probably is needed to send data and burn it for different data for each device and after ship, the product burned to you. Unless it comes as OTP for you.

Other than this I believe the solution would be, to put sockets on the board the moment you get it and save the original somewhere until the time to sell it. In this way will never lose the original by high usage.
 
Last edited:

BIG BEAR

SHOCKbox Developer,
20 Year Member
Joined
Dec 14, 2001
Posts
8,230
Yeah, I have been aware of it for a long time.

The SNK didn't care about people fixing their boards (right to repair) kkkkkk.

In my opinion, the solution would be this. ( https://www.ebay.com/itm/163949600208 )
But somebody needs to verify how this company works because probably is needed to send data and burn it for different data for each device and after ship, the product burned to you. Other than this I believe the solution would be, to put sockets on the board the moment you get it and save the original somewhere until the time to sell it. In this way will never lose the original by high usage.
That didn't exist as an option at the time of the original post but it's good to know that it does now.
Thank you for the heads up.
BB
 
Top