Date: 18 Mar 2000 09:33:59 +0100 From: sperber@informatik.uni-tuebingen.de (Michael Sperber [Mr. Preprocessor]) To: Mike Smith <msmith@freebsd.org> Cc: "Brian J. McGovern" <mcgovern@spoon.beta.com>, brent@kearneys.ca, questions@freebsd.org, hackers@freebsd.org, jfn@enteract.com Subject: Re: AMD Athlon and booting Message-ID: <y9lln3gy8w8.fsf@informatik.uni-tuebingen.de> In-Reply-To: Mike Smith's message of "Fri, 17 Mar 2000 15:25:30 -0800" References: <200003172325.PAA00910@mass.cdrom.com>
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>>>>> "Mike" == Mike Smith <msmith@freebsd.org> writes:
>> >>>>> "Mike" == Mike Smith <msmith@FreeBSD.ORG> writes:
>>
Mike> This has nothing to do with Athlon processors and everything to do with
Mike> buggy BIOS code that doesn't set the "extended keyboard present" bit.
Mike> Feel free to check the (very simple) code in boot2 that performs keyboard
Mike> detection, and if you've got any better ideas on how to make this work
Mike> properly, we're all ears. 8)
>>
>> This is untrue, at least in general. It is a timing problem at least
>> on some Athlon boards. On the MSI 6195, if you increase the timing
>> parameters in probe_keyboard.c, the keyboard will get detected just fine.
Mike> I don't know what you're smoking, but there is no "probe_keyboard.c"
Mike> involved in this. The keyboard probe code is in boot2.c, and it looks
Mike> like this:
Mike> 313 if (opts & 1 << RBX_PROBEKBD) {
Mike> 314 i = *(uint8_t *)PTOV(0x496) & 0x10;
Mike> 315 printf("Keyboard: %s\n", i ? "yes" : "no");
Mike> 316 if (!i)
Mike> 317 opts |= 1 << RBX_DUAL | 1 << RBX_SERIAL;
Mike> 318 opts &= ~(1 << RBX_PROBEKBD);
Mike> 319 }
Mike> There aren't any timing parameters there either. Either bit 4 in the
Mike> byte at 0x400:96 is set, or it's not.
I apologize for being unclear: I was using rawboot which uses the
keyboard probe in probe_keyboard.c in i386/boot/biosboot. That probe
fails by default, and it goes on to work if the timing parameters are
increased.
Why are you being so abrasive?
--
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla
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