Messages in this thread Patch in this message | | | Date | Mon, 27 Nov 2000 20:27:38 +0100 | From | Petr Vandrovec <> | Subject | Re: KERNEL BUG: console not working in linux |
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On Mon, Nov 27, 2000 at 11:08:10AM -0800, H. Peter Anvin wrote:
> It would have been somewhat different if there had been a standard > BIOS function for enabling A20, but there isn't one. > > Sometimes, in the PC world, you just have to draw a line and say "this > is too broken to use". I think the original posters' video card falls > in that category. Get a new video card, they're cheap these days.
Hi, could original complainer (and peoples with AMD SC*) test following patch? It just does nothing in case that A20 enabled bit is already set - such as in case when there is nobody listening on 0x92 and so inb returns 0xFF... (patch is for 2.4.0-test11) Thanks, Petr Vandrovec vandrove@vc.cvut.cz
--- linux/arch/i386/boot/setup.S.orig Mon Oct 30 23:44:29 2000 +++ linux/arch/i386/boot/setup.S Mon Nov 27 20:22:04 2000 @@ -647,8 +647,11 @@ # Brown from Linux 2.2 # inb $0x92, %al # + testb $02, %al + jnz no92 orb $02, %al # "fast A20" version outb %al, $0x92 # some chips have only this +no92: # wait until a20 really *is* enabled; it can take a fair amount of # time on certain systems; Toshiba Tecras are known to have this - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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