MAMEWorld Forums - Programming - A silly question about Mame drivers structure.

Hi guys!

I have recently been playing with the Mame source code adding a few clones (Newbie level).

I have succeeded with older versions of Mame, but I not undestand the "new" fields of the structure of the drivers. They are not documented in Mamedev

. Maybe it's a silly question, but I have not found the answer.

Can someone explain the differences between the old mame driver declaration structure, with the actual driver declaration of the games?

Old declaration in pacman.c (as in the DevWiki in Mamedev)
GAME( 1980, puckman, 0, pacman, pacman, 0, ROT90, "Namco", "PuckMan (Japan set 1)", GAME_SUPPORTS_SAVE )
GAME( 1980, puckmana, puckman, pacman, pacman, 0, ROT90, "Namco", "PuckMan (Japan set 2)", GAME_SUPPORTS_SAVE )

And the actual declaration: found in actual pacman.c:
GAME( 1980, puckman, 0, pacman, pacman, driver_device, 0, ROT90, "Namco", "Puck Man (Japan set 1)", GAME_SUPPORTS_SAVE )
6209 GAME( 1980, puckmana, puckman, pacman, pacman, driver_device, 0, ROT90, "Namco", "Puck Man (Japan set 2)", GAME_SUPPORTS_SAVE )

Specifically the "driver_device" "pacman_state" field use.

There is in somewhere an updated version of the guide for developers in mamedev?

Thanks. :P