Namco System 2 - Video Board Jumper setting tip - JEDEC ROM

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Namco System 2 - Video Board Jumper setting tip - JEDEC ROM


When you convert Namco System 2 games,
You need to use non-JEDEC Roms for ROZ, OBJ sockets.

But it's hard to get non-JEDEC ROMS. (27C100, 27C1000, 27C301)

I tried to find jumper settings to use JEDEC ROMS (27C010, 27C020, 27C040) and find it.


*OBJ sockets (JEDEC - 27C010 / 27C020)
JP3 OO-
JP4 -OO
JP1 OO-
JP2 OO-

*ROZ Sockets (JEDEC - 27C010 / 27C040)
JP8 OO-
JP7 -OO
JP6 -OO
JP5 -OO

*OBJ sockets (non JEDEC - 27C100 / 27C1000)
JP3 -OO
JP4 OO-
JP1 OO-
JP2 -OO

*ROZ sockets (non JEDEC - 27C100 / 27C1000)
JP8 -OO
JP7 OO-
JP6 OO-
JP5 OO-