Mame 0.156新模拟支持游戏

pci: Add grossly hacked smbus [O. Galibert] Experiments in PCI land [O. Galibert] Fixed an annoying inconsistency between memory_share and memory_region:   the width() method of the former returned the width in bits (8， 16， 32 or 64)   while the width() method of the latter returned the width in bytes   (1， 2， 4 or 8). Now both classes have a bitwidth() method and a bytewidth()   method. Updated all callers to use whichever one was more appropriate.   Also removed the implicit-cast-to-any-integer-pointer of memory_regions，   which was rather unsafe (if you weren't careful with your * operators and   casts it was easy to accidentally get a pointer to the memory_region object   itself instead of to the data， with no warning from the compiler... or at   least I kept doing it) Updated all devices and drivers that were accessing   regions that way to use a region_ptr_finder when possible， and otherwise to   call base() explicitly. [Alex Jackson]