- Remove some unnecessary clock domain crossings
- Generate the opl2_cen in the clk_chipset domain
- Fix the rate which used to calculate fractional CE's, SAA(CMS) tone pitch is now correct
* changed chipset clock to 50 mhz.
* Added false_path.
* Change peripheral_clock signal.
* Added F/F to the write process to the EMS memory to resolve timing co…
* Add 2-stage F/F between bus and video module.
* Changed 8253 timer_clock signal.
* Fixed F/F clocks.