Messages in this thread |  | | From | "H. Peter Anvin" <> | Subject | Re: setup.S: A20 enable sequence (once again) | Date | 6 Nov 2000 14:06:04 -0800 |
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Followup to: <E13stqG-0006eJ-00@the-village.bc.nu> By author: Alan Cox <alan@lxorguk.ukuu.org.uk> In newsgroup: linux.dev.kernel > > > This doesn't really work. Neither the fast A20 gate nor the KBC is > > guaranteed to have immediate effect (on most systems they won't.) > > Fast A20 gate happens to be immediate on all the embedded kit I know so its > probably acceptable, and if its too slow it still does the kbc timeout. Since > its generally on chip they dont muck about talking to keyboard and other junk > I/O controllers. >
I'd rather do it "right", which is to poll for A20 in the same loop as we wait for the KBC to become available.
-hpa
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