--- Phillip Susi <psusi@xxxxxxxxxx> wrote: > The int 13 calls to the bios can only accept addresses within the first > 1 MB of memory, and the calls are synchronous, so DMA really doesn't > matter as the cpu will be busy waiting anyhow while the IO takes place, > which will wreak all kinds of hell on the rest of the running system, > including other hardware ISRs. > Not that easy. Once you start int13 transfer, your vm86 thread may be preempted to allow cpu doing something useful, including other ISRs processing. - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs
