the Genesis VDP inherits the SMS vdp code so that it can run in SMS compatibility mode (a feature of the chip) not so that you can try and use it in both modes at the same time.

added an SMS VDP to Megaplay to use as the overlay. rather than abusing this feature of the Genesis VDP.
remove leftover test  code that was accidentally committed (nw)
New clones added

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Super Breakout (Canyon and Vertical Breakout, prototype) [Mariusz Wojcieszek]
(MESS) dmv: add support for K210 and K801 modules. (nw)
zn.c: fix missing required objects regression (nw)
cv1k.c: Detangle the speedups - NW