Pictures of PCB Rom Board for Conversion & Revision Sega Model 1/2/3 & Security Chip

[chacal231077]

Hi

The next idea would be to put images of the different Rom Boards of the games, to
see where they find the good locations of the EPROM & MASK-ROM for possible
conversions & update revisions .


With bonus a small image of the Security Chip related to the game if it is existing

Sega Model 2 : Virtua Fighter 2.1

MODEL 2 A-CRX CPU BD / MODEL 2 A-CRX ROM BD




Sega Model 2 : Dead or Alive

MODEL 2 A-CRX CPU BD / MODEL 2 A-CRX ROM BD



Security Chip :




Sega Model 2 : Virtua Stiker

MODEL 2 B-CRX CPU BD / MODEL 2 B-CRX ROM BD

 

[Darksoft]

I like it! As soon as I'm back in Poland I'll post what I have.

 

[stj]

in the mame driver it mentions a scsi interface.
these boards dont access all those roms as a solid-state scsi-drive do they??
*that* would open a whole shitload of interesting possibilitys!!!!

 

[MetalliC]

anyone have a copy of photos, which is gone now ?
I'm interested to see Dead or Alive security board.

 

[Trol]

Here are pics of my DOA security board:
Are they good enough?

https://trol666.stackstorage.com/s/xTOUC7xyBtjtuMA

https://trol666.stackstorage.com/s/9XNzMRZe9oLBUDN

 

[nnap]

looking for the jumper settings for Dead or Alive and Zero Gunner, both on Model 2 B-CRX.

 

[Trol]

https://trol666.stackstorage.com/s/dKTryH0VvtcoDh0
here's DOA for model 2B-CRX

 

[Trol]

https://trol666.stackstorage.com/s/EiuDsJKjkaIscwL
And DOA for 2A-CRX

 

[Trol]

Do you need eprom locations for DOA?
let me know, they are in my manual

 

[nnap]

thanks a lot for the snaps. Those confirm my findings. So my DIP settings look ok. I took the eprom locations from the MAME source code. So that should be fine on my end.