added rallyx driver. Correctly it boots but stops on unimplemented Z80 opcodes
implemented a few missing instructions in Z80 + some more cases in interrupts. Rallyx appears playable!
implemented interrupt mode 2 . PacmanJp is now playable
xxcb_26 for minvadr which appears to work fine now
added dummy SN76496 sound driver
added lady bug driver + some fixes , addons to Z80.  Now ladybug , cavenger , snapjack are playable