NEO-CMC: Difference between revisions

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[[File:crt_cmc.jpg|thumb|"CMC42" chip on a MVS [[cartridges|cartridge]]. Picture courtesy of [[http://www.mvs-scans.com MVS-Scans]].]]
{{ChipInfo
|picture=crt_cmc.jpg
|pkg=QFP180
|manu=toshiba
|date=1999 ?
|gates=A lot
|used_on={{PCB|CHAFIO}}...
}}


The most "basic" information published can be found at [[http://mamedev.org/source/src/mame/machine/neocrypt.c.html MAME:neocrypt.c]]
[[File:brd_cmcnoref.jpg|thumb|"CMC50"]]
 
Late SNK custom chip used for protection, bankswitching and latching on [[CHAFIO]] [[CHA board]]s.
 
Descrambling/decryption infos can be found in [[https://github.com/mamedev/mame/blob/master/src/devices/bus/neogeo/prot_cmc.cpp  MAME:prot_cmc.c]]


The detailed information bellow:
==Versions==
This chip is a TC190G series Toshiba ASIC developed between 1990 and 1994.


The NEO-CMC Chip is a Asic (Application Specific Integrated Circuit). This device can be programmed only once after the manufaturer had created severals stable prototypes using FPGA (Field Programmable Gate Array) or another technology. And decide to create a Custom Chip
The datasheet apparently can't be found anymore for any of the known types:
*TC190G06CF7008
*TC1'''90G06CF7042'''
*TC1'''90G06CF7050'''
(probably others...)


To get a intuition about costs related read this:
SNK merged the following designs into this chip:
[[http://www.design-reuse.com/articles/9010/fpga-s-vs-asic-s.html FPGA vs ASICs production and design]]
*{{Chipname|NEO-ZMC}}
*{{Chipname|NEO-ZMC2}}
*{{Chipname|NEO-273}}
*{{Chipname|PRO-CT0}}
*New scrambling system that interlaces M1 + (C* + S1) to decrypt all the graphics ROMs data in real time (NEOCMC42).
*New scrambling system that interlaces M1 + (C* + S1) to decrypt all the graphics ROMs data and Sound Driver ROM data in real time (NEOCMC50).


So SNK had planned to put his next protection and try to avoid NeoGeo piracy using the NEOCMC algorithm.
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]]


The Toshiba as partner of SNK, not only made solution to hold data on it's Mask Roms (TC5xxxx) as used its technology solutions to help SNK try to avoid the Piracy. Toshiba until 1995 had a line of Asics called TC190G series, the evolution can be found here [[http://www.toshiba-components.com/ASIC/Technology.html Toshiba Technology RoadMap]].
On this version only the [[S ROM|S1]] and [[C ROM]]s 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]]


One of the series of its technology that was best switable to SNK was TC190G series of ASIC.
Until today, nobody has released a cloned chip on the underground market.


The series TC190G cannot be found in datasheets anymore, but in past years had these models of chips:
==Fix handling==
*TC190G06CF7008
*TC190G06CF7042
*TC190G06CF7050
may be more...


Apparently the last two models was used because the number of internal gates was compatible what SNK wanted, to build inside this custom the following logic algorithms:
See [[fix bankswitching]].
*NEO-ZMC
*NEO-273
*And a new scrambling system for that interlaces M1 + CX + S1 ROM data


==Encryption==


Than, released model of CMC was NEO-CMC42 in the following cartridges:
Todo.
{|
|'''CART ID'''
|'''TITLE NAME'''
|-
|070
|Zupapa
|-
|251
|King Of Fighters 99
|-
|252
|Ganryu
|-
|253
|Garou Mark Of the Wolves
|-
|254
|Strikers 1945
|-
|255
|Prehistoric Isle 2
|-
|256
|Metal Slug 3
|-
|259
|Bang Bead
|-
|260
|Nightmare in the Dark
|-
|261
|Sengoku 3
|-
|}


This version had only S1 and CRoms Encrypted and M1 was in normal condition (unencrypted)
=Pinout=
[[File:Neocmc_7050_7042_pinout.png|x600px]]


This was just a just a test to see if SNK and Toshiba could be more further in protection
OpenOffice Draw file: [[File:Neocmc_7050_7042.odg]]


Next SNK just incremented a new scramble and some tests point into M1 to validate the sync decryption and this caused to SNK release the model NEO-CMC50 on the following cartridges:
'''Signals:'''
{|
CXe_D[0..15]: C odd data bus
|'''CART ID'''  
CXo_D[0..15]: C even data bus
|'''TITLE NAME'''
CX_A[0..21]: C1~8 address bus
|-
|008
Pin : 32 connects to Mitsumi (PST600D) reset generator to re-initialize the NEO-CMC in case of power failure.
|Jockey Grand Prix
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.
|257
Pin : 94 is configured in:
|King Of Figthers 2000
      NEO-MVS CHAFIO as NC
|-
      NEO-AEG CHAFIO as 12M
|262
Pin :147 is configured in:
|King Of Figthers 2001
      '''NEO-MVS CHAFIO''' (2003.07.24) as M1_CE
|-
      '''NEO-MVS CHAFIO''' (1999.06.14) as NC
|263
      NEO-AEG CHAFIO (2003.07.24) as M1_CE
|Metal Slug 4
      NEO-AEG CHAFIO (1999.08.10) as NC
|-  
|264
|Rage of the Dragons
|-
|265
|King Of Fighters 2002
|-  
|266
|Power Instinct - Matrimele
|-
|267
|Pochi to Nyaa
|-  
|268
|Metal Slug 5
|-  
|269
|SNK vs Capcom Chaos
|-
|270
|Samurai Showdown Zero / Samurai Showdown 5
|-  
|271
|King of Fighters 2003  
|-
|272
|Samurai Showdown Zero Special / Samurai Showdown 5 Special
|-
|}
About Jockey Gran Prix, some peoples say this game is not official release but it´s not true.
At least its production of the card is official, because they had used the REAL Encryption that cannot be mocked easly.
Only the Toshiba and SNK knew the encryption and until today "NO ONE" piracy goes so forensic to mock it.
Explanation Later.




'''Comparing MVS and AES Cartridges vs MVH PCBs:'''
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-MVS CHAFIO (2003.07.24) as M1_CE'''
      '''NEO-AEG CHAFIO (2003.07.24) as M1_CE'''
      NEO-MVS MVOB  (2003.07.09) as NC    (SVC pcb - '''fixed by wirewrap''')
      NEO-MVS MVO    (2003.06.05) as NC    (SVC pcb)
      '''NEO-MVS CHAFIO (1999.06.14) as NC'''
      '''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'''


[[File:brd_cmcnoref.jpg|thumb|"CMC50"]]
'''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.


Also found on [[ROM-Only boards|ROM-only]] arcade boards, without the "NEO-CMC" marking.
=Pinout=
[[File:Neocmc_7050_7042_pinout.png]]


Notes:
*C_e_D[0-15]: C1/C3/C5/C7 data bus
*C_o_D[0-15]: C2/C4/C6/C8 data bus
*CX A[0-21]: C1/C2/C3/C4/C5/C6/C7/C8 address bus
*Pins 87,88 contains a RC circuit clock driver like in a 8085 with X1 and X2 pinouts
*Pins 89 and 92 are short circuited in Cartridge board.
[[Category:Chips]]
[[Category:Chips]]

Latest revision as of 18:35, 28 July 2023

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.

The datasheet apparently can't be found anymore for any of the known types:

  • TC190G06CF7008
  • TC190G06CF7042
  • TC190G06CF7050

(probably others...)

SNK merged the following designs into this chip:

  • NEO-ZMC
  • NEO-ZMC2
  • NEO-273
  • PRO-CT0
  • New scrambling system that interlaces M1 + (C* + S1) to decrypt all the graphics ROMs data in real time (NEOCMC42).
  • New scrambling system that interlaces M1 + (C* + S1) to decrypt all the graphics ROMs data and Sound Driver ROM data in real time (NEOCMC50).

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

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:

Until today, nobody has released a cloned chip on the underground market.

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

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.
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


Comparing MVS and AES Cartridges vs MVH PCBs: 

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-MVS CHAFIO (2003.07.24) as M1_CE
     NEO-AEG CHAFIO (2003.07.24) as M1_CE
     NEO-MVS MVOB   (2003.07.09) as NC    (SVC pcb - fixed by wirewrap)
     NEO-MVS MVO    (2003.06.05) as NC    (SVC pcb) 
     NEO-MVS CHAFIO (1999.06.14) as NC
     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

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.
Retrieved from "https://wiki.neogeodev.org/index.php?title=NEO-CMC&oldid=8288"