NEO-CMC

Package	QFP180
Manufacturer
First use	1999 ?
Used on	CHAFIO...

File:Brd cmcnoref.jpg

"CMC50"

Late SNK custom chip used for protection, bankswitching and latching on CHAFIO CHA boards.

Descrambling/decryption infos can be found in [MAME:prot_cmc.c]

Versions

This chip is a TC190G series Toshiba ASIC developed between 1990 and 1994. Two versions of the chip are known to exist:

• TC190G06CF7042
• TC190G06CF7050

They contain the logic for:

• NEO-ZMC2
• NEO-273
• New scrambling system that interlaces M1 + (C* + S1) to decrypt all the graphics ROMs data in real time (042 version).
• New scrambling system that interlaces M1 + (C* + S1) to decrypt all the graphics ROMs data and Sound Driver ROM data in real time (050 version).

The first released NEO-MVS CHAFIO PCBs came out with the 042 version of NEO-CMC, on the following cartridges:

• Zupapa!
• The King of Fighters '99 - Millennium Battle
• Ganryu
• Garou - Mark of the Wolves
• Strikers 1945 Plus
• Prehistoric Isle 2
• Metal Slug 3
• Bang Bead
• Nightmare in the Dark
• Sengoku 3

On this version only the S1 and C ROMs are encrypted and M1 remains unencrypted. Almost one year later, SNK decided to add one more layer, this time also encrypting M1. This new NEO-CMC chip had the 050 reference and was found in the following cartridges:

• 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

To this day, no one has produced a reproduction of these chips.

Fix handling

See fix bankswitching.

Encryption

Todo.

Pinout

OpenOffice Draw file: File:Neocmc 7050 7042.odg

Signals:

CXe_D[0..15]: C odd data bus
CXo_D[0..15]: C even data bus
CX_A[0..21]: C1~8 address bus (NEO-MVS & NEO-AEG)
CX_A[0..22]: C1~4 address bus (NEO-MVH only)

Pin : 32 connects to Mitsumi (PST600D) reset generator to re-initialize the NEO-CMC in case of power failure.
Pins: 87 and 88 contains a RC circuit clock driver like in a 8085 with X1 and X2 pinouts
Pins: 89 and 92 are interconnected.
-----------------------------------------------
Pins: 62~69, 71~78, 80~84 are configured in:
     NEO-MVS CHAFIO as CR31~CR24, CR23~CR16, CR15~CR11 respectively
     NEO-AEG CHAFIO as   NC~NC  ,   NC~NC  ,   NC~NC
-----------------------------------------------
Pins: 102, 103~106, 107~110, 112~113 are configured in:
     NEO-MVS CHAFIO as CR10, CR9~CR6 ,  CR5~CR2 ,  CR1~CR0
     NEO-AEG CHAFIO as NC  ,GBD3~GBD0, GAD3~GAD0, DOTB~DOTA
-----------------------------------------------
Pin : 94 is configured in:
     NEO-MVS CHAFIO as NC 
     NEO-AEG CHAFIO as 12M
-----------------------------------------------
Pin :147 is configured in:
     NEO-MVS CHAFIO (2003.07.24) as M1_CE
     NEO-MVS CHAFIO (1999.06.14) as NC
     NEO-AEG CHAFIO (2003.07.24) as M1_CE
     NEO-AEG CHAFIO (1999.08.10) as NC
-----------------------------------------------
Pin :153 is configured in:
     NEO-MVS (ALL) as VCC
     NEO-AEG (ALL) as GND

Comparing MVH PCBs vs MVS & AES Cartridges

Pin :147 is configured in:
     NEO-MVH MVOC   (2003.11.03) as M1_CE (KOF2003 pcb)
     NEO-MVH MVOBR  (2003.08.04) as M1_CE (MSLUG5 pcb)
     NEO-MVH MVOB   (2003.07.09) as NC    (SVC pcb) - M1_CE (fixed by wirewrapps)
     NEO-MVH MVO    (2003.06.05) as NC    (SVC pcb) 
     NEO-MVS CHAFIO (2003.07.24) as M1_CE
     NEO-MVS CHAFIO (1999.06.14) as NC
     NEO-AEG CHAFIO (2003.07.24) as M1_CE
     NEO-AEG CHAFIO (1999.08.10) as NC
-----------------------------------------------
Pin :152 is configured in:
     NEO-MVH (MVOC) as VCC
     NEO-MVH (MVO, MVOB, MVOBR) as GND
     NEO-MVS (ALL) as GND
     NEO-AEG (ALL) as GND
-----------------------------------------------
Pin :153 is configured in:
     NEO-MVH (ALL) as VCC
     NEO-MVS (ALL) as VCC
     NEO-AEG (ALL) as GND
-----------------------------------------------
Pin :154 is configured in:
     NEO-MVH (MVO, MVOB, MVOBR, MVOC) as C2C1_OE
     NEO-MVS (ALL) as NC
     NEO-AEG (ALL) as NC
-----------------------------------------------
Pin :155 is configured in:
     NEO-MVH (MVO, MVOB, MVOBR, MVOC) as C4C3_OE
     NEO-MVS (ALL) as NC
     NEO-AEG (ALL) as NC
-----------------------------------------------
Pin :158 is configured in:
     NEO-MVH (MVO, MVOB, MVOBR, MVOC) as NC
     NEO-MVS (ALL) as C8C7_OE
     NEO-AEG (ALL) as C8C7_OE
-----------------------------------------------
Pin :159 is configured in:
     NEO-MVH (MVO, MVOB, MVOBR) as NC
     NEO-MVH (MVOC) as C6C5_OE
     NEO-MVS (ALL) as C6C5_OE
     NEO-AEG (ALL) as C6C5_OE
-----------------------------------------------
Pin :160 is configured in:
     NEO-MVH (MVO, MVOB, MVOBR) as NC
     NEO-MVH (MVOC) as C4C3_OE
     NEO-MVS (ALL) as C4C3_OE
     NEO-AEG (ALL) as C4C3_OE
-----------------------------------------------
Pin :161 is configured in:
     NEO-MVH (MVO, MVOB, MVOBR) as NC
     NEO-MVH (MVOC) as C2C1_OE
     NEO-MVS (ALL) as C2C1_OE
     NEO-AEG (ALL) as C2C1_OE
-----------------------------------------------
Pin :189 is configured in:
     NEO-MVH (MVO, MVOB, MVOBR, MVOC) as A22 (128Mbit) (connected from CMC to the driver input and from output to C ROM's A22)
     NEO-MVS (ALL) as NC
     NEO-AEG (ALL) as NC
-----------------------------------------------
Pin :190 is connected from CMC to the driver input, but NC from it's output:
     NEO-MVH (MVO, MVOB, MVOBR, MVOC) as A23 (256Mbit) (assumption it's prepared for big size C ROMs )
     NEO-MVS (ALL) as NC
     NEO-AEG (ALL) as NC
-----------------------------------------------
Pin :191 is connected from CMC to the driver input, but NC from it's output:
     NEO-MVH (MVO, MVOB, MVOBR, MVOC) as A24 (512Mbit) (assumption it's prepared for big size C ROMs)
     NEO-MVS (ALL) as NC
     NEO-AEG (ALL) as NC

Final Notes

NOTE1: There are no pinout differences between NEO-CMC42 and NEO-CMC50 however, differences can be spotted between previous and later board releases with respect to some setup lines and pin 147. A substantial setup difference can be found comparing the boards of AES and MVS releases. The way the chip access and delivery the graphic data is different between them and both configurations are available inside the NEO-CMC that is configured by the setup of the board itself. So the NEO-CMC is interchangeable between boards between MVS, AES, and MVH embedded. See the releases at (CHAFIO)

NOTE2: In case somebody wonders, it's impossible to downgrade or upgrade NEO-CMCs between different versions (from 42 to 50 and vice-versa). The reason is that it's impossible without preparing the game for that and the algorithm to do it is unknown.

NOTE3: In MVH with embedded CHAFIO the NEO-CMC50 (pin 147 as M1_CE) is native present on the follow releases: 2003.08.04 (MSLUG 5) and 2003.11.03 (KOF2003). However on releases 2003.06.05 and 2003.07.09, both from SVCChaos (set1 and set2), that pin is natively configured as NC, but artificially fixed on set2 by wirewraps.

NOTE4: In MVH release 2003.11.03 (KOF2003) only, there is one configuration change that not appear in any other board AES, MVS or MVH. The pin 152 is connected to VCC. This require further investigation to check what's being switched. Perhaps from 64mbits to 128Mbits?

NOTE5: In MVH (ALL) the pins: 
       189 is connected to through buffer driver to A22 (128Mbit), 
       190 and 191 are pre-connected to the buffer drivers and left as NCs from there. 
       The assumption here is that the CMC is ready for bigger C Roms (256Mbit and 512Mbit). 
       Question: Would be easy left them shorted to VCC or GND. Why make parallel tracks without necessity?).

NEO-CMC presence

MVH (PCB)

NOTE: CHAFIO was designed embedded on MVH releases bellow.
-------------------------------------------------------------------------------------------------------------------------------------------------
MVH BOARD             ID   COMPANY       PCB MODEL   MADE_IN  PROTECTION           RELEASED - TITLE
-------------------------------------------------------------------------------------------------------------------------------------------------
NEO-MVH MVOC          271  SNK Playmore  2003.11.03  JAPAN    NEO-CMC 90G06CF7050  2003 - The King of Fighters 2003
NEO-MVH MVO           269  SNK Playmore  2003.06.05  JAPAN    NEO-CMC 90G06CF7050  2003 - SNK vs Capcom Chaos
NEO-MVH MVOB          269  SNK Playmore  2003.07.09  JAPAN    NEO-CMC 90G06CF7050  2003 - SNK vs Capcom Chaos
NEO-MVH MVOBR         268  SNK Playmore  2003.08.04  JAPAN    NEO-CMC 90G06CF7050  2003 - Metal Slug 5

MVS

---------------------------------------------------------------------------------------------------------------------------------------------------
MVS BOARD             ID   COMPANY       PCB MANUFACTURER            VERSION     MADE_IN  PROTECTION           RELEASED - TITLE
  -------------------------------------------------------------------------------------------------------------------------------------------------
NEO-MVS CHAFIO        272  SNK Playmore  FK                          2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2004 - Samurai Showdown Special / Samurai Spirits Zero Special
NEO-MVS CHAFIO        271  SNK Playmore  FK                          2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2004 - The King of Fighters 2003
NEO-MVS CHAFIO        270  SNK Playmore  FK                          2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2003 - Samurai Showdown 5 / Samurai Spirits Zero
NEO-MVS CHAFIO        269  SNK Playmore  FK                          2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2003 - SNK vs Capcom Chaos
NEO-MVS CHAFIO        268  SNK Playmore  FK                          2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2003 - Metal Slug 5
NEO-MVS CHAFIO        267  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7050  2003 - Pochi and Nyaa
NEO-MVS CHAFIO        266  SNK           Q2                          1999.06.14  JAPAN    NEO-CMC 90G06CF7050  2002 - Matrimelee - Shin Goketsuji Ichizoku
NEO-MVS CHAFIO        265  SNK           Q2                          1999.06.14  JAPAN    NEO-CMC 90G06CF7050  2002 - The King of Fighters 2002
NEO-MVS CHAFIO        264  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7050  2002 - Rage of The Dragons
NEO-MVS CHAFIO        263  SNK           ---                         2002.??.??  KOREA    NEO-CMC 90G06CF7050  2002 - Metal Slug 4
    MVS CHAFIO REV1.0 262  SNK           KJ3-V-0                     2001.??.??  KOREA?   NEO-CMC 90G06CF7050  2001 - The King of Fighters 2001 (same design of 1999.06.14)
NEO-MVS CHAFIO        257  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7050  2000 - The King of Fighters 2000 (same design of 1999.06.14)
NEO-MVS CHAFIO        261  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7042  2001 - Sengoku 3
NEO-MVS CHAFIO        260  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7042  2001 - Nightmare in the Dark
NEO-MVS CHAFIO        259  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7042  2001 - Bang Bead
NEO-MVS CHAFIO        256  SNK           MEB-494V-0 S / MEB-594V-0 S 1999.06.14  JAPAN    NEO-CMC 90G06CF7042  2001 - Metal Slug 3
NEO-MVS CHAFIO        255  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7042  1999 - Pre-Historic Isle 2 - Genshi-tō
NEO-MVS CHAFIO        254  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7042  1999 - Strikers 1945 Plus
NEO-MVS CHAFIO        253  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7042  1999 - Garou Mark of the Wolves
NEO-MVS CHAFIO        252  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7042  1999 - Ganryu - Musashi Ganryuki
NEO-MVS CHAFIO        251  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7042  1999 - The King of Fighters 99
NEO-MVS CHAFIO        070  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7042  2001 - Zupapa
NEO-MVS CHAFIO        008  SNK           MEB-494V-0 S                1999.06.14  JAPAN    NEO-CMC 90G06CF7050  1999 - Jockey Grand Prix

AEG (AES)

-------------------------------------------------------------------------------------------------------------------------------------------------
AEG BOARD             ID   COMPANY       PCB MANUFACTURER VERSION     MADE_IN  PROTECTION           RELEASED - TITLE
-------------------------------------------------------------------------------------------------------------------------------------------------
NEO-AEG CHAFIO        272  SNK Playmore  FK               2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2004 - Samurai Showdown Special / Samurai Spirits Zero Special
NEO-AEG CHAFIO        271  SNK Playmore  FK               2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2004 - The King of Fighters 2003
NEO-AEG CHAFIO        270  SNK Playmore  FK               2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2003 - Samurai Showdown 5 / Samurai Spirits Zero
NEO-AEG CHAFIO        269  SNK Playmore  FK               2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2003 - SNK vs Capcom Chaos
NEO-AEG CHAFIO        268  SNK Playmore  FK               2003.07.24  JAPAN    NEO-CMC 90G06CF7050  2004 - Metal Slug 5
NEO-AEG CHAFIO        266  SNK           Q2 94V-0         1999.08.10  JAPAN    NEO-CMC 90G06CF7050  2003 - Matrimelee - Shin Goketsuji Ichizoku
NEO-AEG CHAFIO        265  SNK           Q2 94V-0         1999.08.10  JAPAN    NEO-CMC 90G06CF7050  2002 - The King of Fighters 2002
NEO-AEG CHAFIO        264  SNK           Q2 94V-0         1999.08.10  JAPAN    NEO-CMC 90G06CF7050  2002 - Rage of The Dragons
NEO-AEG CHAFIO        263  SNK           MEB-494V-0       1999.08.10  JAPAN    NEO-CMC 90G06CF7050  2002 - Metal Slug 4
NEO-AEG CHAFIO        262  SNK           MEB-494V-0       1999.08.10  JAPAN    NEO-CMC 90G06CF7050  2002 - The King of Fighters 2001
NEO-AEG CHAFIO        257  SNK           MEB-494V-0       1999.08.10  JAPAN    NEO-CMC 90G06CF7050  2000 - The King of Fighters 2000
NEO-AEG CHAFIO        261  SNK           MEB-494V-0       1999.08.10  JAPAN    NEO-CMC 90G06CF7042  2001 - Sengoku 3
NEO-AEG CHAFIO        256  SNK           MEB-494V-0       1999.08.10  JAPAN    NEO-CMC 90G06CF7042  2001 - Metal Slug 3
NEO-AEG CHAFIO        253  SNK           MEB-494V-0       1999.08.10  JAPAN    NEO-CMC 90G06CF7042  2000 - Garou Mark of the Wolves
NEO-AEG CHAFIO        251  SNK           MEB-494V-0       1999.08.10  JAPAN    NEO-CMC 90G06CF7042  1999 - The King of Fighters 99