pacman.cpp: upgrade clubpacm and clubpacma to working

[devinacker]

These two commits add/improve a few things for clubpacm and clubpacma:

• Multiplexed P1/P2 joystick inputs for Double Command mode in clubpacm
• Corrections to other inputs (including dip switches)
• Simple protection(?) latch needed by at least clubpacma

Both of these sets should now be in good shape, aside from some bugs in the games themselves (which I tried to document in comments where possible, e.g. the broken free play setting).

The only thing I'm not really sure about is whether clubpacm is supposed to support third and fourth joysticks for the other side of a cocktail table, or if it's even intended to be playable in cocktail mode in the first place...

[devinacker]

As for the other set of this game (clubpacmb / "set 2"), I suspect that the program ROM for this one might just be a bad dump of the one from set 1. The two ROMs are byte-for-byte identical, except all byte values between 0x40-0xBF in set 1 have their two most significant bits missing in set 2 (i.e. they all became 0x00-0x3F), which to me suggests the EPROM might just be faulty rather than encrypted. What do you folks think?

[cuavas]

The “encrypted” set is probably just bit rot, it sounds more like data loss than encryption.

[Osso13]

I looked a bit at clubpacmb some time ago and discussed it a bit with another dev. I agree it's probably a bad dump.