don't do dual writes to opl2
Add proper opl3 handling of the waveform select to dbopl
Enable A20 routines in bios
Change adlib timer masking
Make adlib timers synchronize on clock interval and fix masking
Some dma changes to make the world a better place
Fix sblaster autoinit restart and improve the auto into single cycle transfer handling
Add simple program that allows you to boot into a bios image for running cpu tester bios