A couple of simple (?) question for all you tech wizzards out there:

1. On an AT, is data transfer to/from the hard disk handled by DMA and are
interrupts enabled during transfer? In particular, I want to be able to service
interrupts that occur every 100us without missing any during disk transfers. 

2. Can one of the system timers be programmed to interrupt at (approximately)
a 100us rate? If so, which one?

All responses welcomed!

Thanks,
	Tim