Messages in this thread | | | From | (H. Peter Anvin) | Subject | Re: Future Domain TMC-8xx fixup | Date | 24 Aug 1998 04:56:21 GMT |
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Followup to: <Pine.LNX.3.96.980823134218.9050H-100000@penguin.transmeta.com> By author: Linus Torvalds <torvalds@transmeta.com> In newsgroup: linux.dev.kernel > > Applied. > > Btw, as far as I know, an ISA read will cost closer to 1 usec rather than > 1/8 usec. > > Yes, the ISA bus is 8MHz, but when you actually do a read that's not just > one bus cycle, even in theory it's at least two cycles (one to assert the > address, one to get the result), and in practice it seems to be noticeably > more. >
1.5 µs is the figure I keep hearing bradied about...
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