> > > the mcu that brings these games are all the same or vary in different pcb?
> >
> > It's not an MCU, it's a fixed-function ASIC. Kale can speak to the details better,
> > but the functionality is somewhat different on different games.
>
> Actually, functionality is the same for all the games minus Seibu Cup Soccer (has an
> earlier revision of the COP ROM, unknown purpose as per now). The only real
> differences between Legionnaire and Raiden 2 HWs functionality so far known is the
> endianess of some commands, but that's mainly because of the different CPU used (m68k
> vs. i86) and some ports are shuffled around via a PAL, in a clear attempt to not
> allow exchanging/upgrading of the boards.
What is the mystery behind the COPX roms?
MAME source and PCB infos of the Legionnaire games says:
Denjin Makai and Godzilla uses a COPX-D2 (copx-d2.313 - user1, 512k). These roms are dumped
and they are identical.
SD Gundam Sangokushi uses a COPX-D2, the rom is also dumped, but only the first 256k.
These 256k are identical to the first 256k of the Denjin Makai/Godzilla COPX-D2.
Seibu Cup Soccer uses a COPX-D1 and the rom was dumped. When you compare it with the
Denjin Makai/Godzilla COPX-D2 it is identical, except the last bytes at 3FFC-3FFF and
7FFC-7FFF, they are filled with $FF in the Denjin Makai/Godzilla COPX-D2 and $00 in Seibu Cup Soccer COPX-D1.
Legionnaire uses a COPX-D1, but it is not dumped. Can it use the Seibu Cup Soccer COPX-D1 ?
Heated Barrel uses a COPX-D2, but it is not dumped. Can it use the Denjin Makai COPX-D2 ?
M*A*S*H
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