2009-11-04
- char_gen.vhdl: add csr_posx_out, csr_posy_out to port. Make it register readable (done 2009-11-04)
- several async. resets recognized. Sync. resets better?
- Make screen width, screen height and FPS register readable (done 2009-11-04)

2009-11-08
- Double-buffering to reduce artifacts on buffer write by host and buffer read by VGA master.
  currently double-buffer can only be updatetd if msten = 0. Buffer updates should be always possible
  for large screen change, which need more time than one frame. (done 2009-11-08)
- VGA-INT every n-th buffer change?