The 5530 in native mode only generates SMI. I've always felt however thatLooks like somebody did it already. I will try it as soon as I can.
if you make the buffers big enough you ought to be able to drive it off
the 1KHz timer tick by polling. Interesting project.
You btw won't have removed the SMM firmware or the box wouldn't boot. TheHmm. I don't have VGA. Linux was always starting without VGA console. I had to disable display (power off the DAC's) because of constant "Checking FLASH" screen.
5530 uses SMM to emulate some of the most basic PC components including
the VGA video.
AlanRafał
http://link.interia.pl/f1b14