Thanks again for the elaborate answer, I have learned a lot. Just would like to ask one more question: On Fri, Feb 22, 2008 at 3:11 PM, Rene Herman <rene.herman@xxxxxxxxxxxx> wrote: > On 21-02-08 17:24, Peter Teoh wrote: > > Well, no, it's about address setup and timeout delays indeed and about how > the specifications of the ISA bus make (or made...) this a well defined and > CPU-speed independent way for creating those short delays. An access to a > non-existent port on ISA takes some 8 bus cycles for address setup and > timeout which with the regular ISA bus speed of 8 MHz gets us our 1 us. > This timing of 8Mhz (or 8.33Mhz right?) is supposed to be 1/4 of the PCI bus speed of 33Mhz right? (read from altera website). And so how about 66Mhz PCI bus - so for 8 bus cycles it will be half of 1us, correct? -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
