Plans about DMA/IRQ/IO emulation for DOSRUN

Main problem that emulated IO instructions are _VERY_ slow.
Overhead !

* Direct IO port access
  This method enable direct enabling a port. This is VERY dangerous, requires
  root privilegies and can interfere with the kernel.
  
* Emulated IO port access
  "DMA"


SB emulation through standard Linux OSS devices (ALSA planned ;-)
Since most programs use DMA for sound output, slow IO emulation is not
too important :