I answered you in the PM, but thought the info would help others so I'll post it here...
http://maws.mameworld.info/maws is your friend when it comes to figuring out boards that you can't find schematics for. Look at the driver.c information to see what the CPU, video chipset, and other items are for the board.
Search for Blitz 99 then look at the driver to find more info...