Re: Future Domain TMC-8xx fixup
H. Peter Anvin (hpa@transmeta.com)
24 Aug 1998 04:56:21 GMT
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...
-hpa
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