serial debug patch for ADLO

Sun Apr 20 09:09:00 CEST 2003

hmm that does not look right.

in general bochs bios should have tried to:
	- initalize vga module
	- try to boot from floppy (and fail)
	- try to load MBR from /dev/hda

I think it did init vga bios as it is probably the first thing it does
(before the bochs banner which we can see below). Though u might want
to double check on this.

I would expect to see the "floppy boot fail" (or similar) message instead
of that "PCI BIOS function" which seems to be the last message here.

as far as vga bios goes, I would try doing warm boot from pc bios and see
what happen.

as far as bochs bios itself goes, u will have to try enable some debugging
information and see where exactly it stop. in particular I would try to
enable interupt 13, since it might actually be reading MBR (that's the
only place that I can think of hand that would probe for PCI bios).

On Sun, 20 Apr 2003, bendany wrote:

> hi,all.
> I have got the serial patch, and test it.  but still have problem.
> my mainboard is k7sem ver3.0c
> here is some output message:
> ---------------------------------------------------
> Searching for server (DHCP)...
> ...Me: 192.168.0.40, Server: 192.168.0.38, Gateway 192.168.0.250
> Loading 192.168.0.38:/var/tftpboot/kernel ...(ELF)...
> ............................................................................
> ................done
>  rombios.c,v 1.1 2002/11/25 02:07:53 rminnich Exp $
> FATAL: Keyboard RESET error:31
> FATAL: Keyboard RESET error:994
> FATAL: Keyboard RESET error:995
> FATAL: Keyboard RESET error:996
> *** int 15h function AX=F401, BX=0005 not yet supported!
> Bochs BIOS, 1 cpu, $Revision: 1.1 $ $Date: 2002/11/25 02:07:53 $
> [BOCHS BIOS VER:1.79]
> [COMPILE DATE:Apr 20 2003 TIME:15:00:19]
>
> DEVICE:0
> ata0 master: PCHS=16383/16/63 translation=lba LCHS=1024/255/63
> ata0 master: IBM-DTLA-307030 ATA-5 Hard-Disk (29314 MBytes)
>
> PCI BIOS function 0x01
> ---------------------------------------------------
> and the screen can show some strange character, sometimes are part of
> original BIOS message.
> I think the bochs BIOS has run.
> any tips?  thanks!
>
> ----- Original Message -----
> From: "Adam Sulmicki" <adam at cfar.umd.edu>
> To: "Gregg C Levine" <hansolofalcon at worldnet.att.net>
> Cc: "Linuxbios" <linuxbios at clustermatic.org>
> Sent: Saturday, April 19, 2003 9:15 AM
> Subject: RE: serial debug patch for ADLO
>
>
> >
> > mostly yes, this is why he was able to get serial boot in just several
> > hours of work.
> >
> > the major quirks were that he needed to code up the patch for serial
> > output for bochs to see what's going on. then reconfigure lilo for serial
> > output. Then to the same with linux.
> >
> > another issue was that while VIA EPIA-M has 128mb ram, upper 32 mb are
> > revered for video. thus E820 map had to be modifed so that it shows 96mb
> > of ram instead of 128mb to linux.
> >
> > i think that's about it.
> >
> > On Sat, 19 Apr 2003, Gregg C Levine wrote:
> >
> > > Hello from Gregg C Levine
> > > So I gathered from his earlier posts on this subject, and about that
> > > board specifically. But Adam, isn't ADLO board agnostic? By that I
> > > mean, that it does not need to know what motherboard it is being used
> > > on, unlike basic Linux BIOS. But, I am indeed watching this with
> > > interest.
> > > -------------------
> > > Gregg C Levine hansolofalcon at worldnet.att.net
> > > ------------------------------------------------------------
> > > "The Force will be with you...Always." Obi-Wan Kenobi
> > > "Use the Force, Luke."?Obi-Wan Kenobi
> > > (This company dedicates this E-Mail to General Obi-Wan Kenobi )
> > > (This company dedicates this E-Mail to Master Yoda )
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: linuxbios-admin at clustermatic.org [mailto:linuxbios-
> > > > admin at clustermatic.org] On Behalf Of Adam Sulmicki
> > > > Sent: Saturday, April 19, 2003 11:32 AM
> > > > To: hcyun at etri.re.kr
> > > > Cc: linuxbios at clustermatic.org
> > > > Subject: Re: serial debug patch for ADLO
> > > >
> > > >
> > > > to clarify. He's been working on getting ADLO running on EPIA-M.
> > > >
> > > > He's been pretty succesfull so far.
> > > >
> > > > Using serial console he's got both lilo and linux to boot using
> > > ADLO, so
> > > > that you can use them pretty much "out of box" as long as you don't
> > > need
> > > > video. However from what I heard you can get video once boot is done
> > > and
> > > > you run some video program (TinyX Xvesa here).
> > > >
> > > > As far as video goes, on cold-reboot he's getting :
> > > >
> > > > Then, screen is blinkering with various color, but I can't see
> > > any
> > > > text.
> > > >
> > > > As far as video goes, on warm-reboot (after booting with original PC
> > > BIOS)
> > > > he's getting :
> > > >
> > > > If I first booted from original bios and reset with linuxbios
> > > +
> > > > adlo, I can see text messages of original bios remained.
> > > >
> > > > ideas on how to attack the issue?
> > > >
> > > > Overall I would say that anyone who want to try get ADLO to work
> > > should
> > > > start with serial console and leave VIDEO to the end given
> > > difficulty
> > > > debugging binary-only module.
> > > >
> > > > Another good idea is to try warm-boot from PC BIOS into ADLO at
> > > beginning
> > > > of development/work on ADLO. It leaves you with somewhat functioning
> > > > video-bios (or fully-functioning as it was for me).
> > > >
> > > > On Sun, 20 Apr 2003 hcyun at etri.re.kr wrote:
> > > >
> > > > > Hello,
> > > > >
> > > > > I made a patch which make all bochs debug message can be seen from
> > > serial
> > > > > terminal.
> > > > > I think it might be useful if you want to apply ADLO to your own
> > > target.
> > > > >
> > > > > you can apply this patch againt util/ADLO/bochs/bios/rombios.c by
> > > > > # patch -p0 < rombios-serial.patch
> > > > >
> > > > > Regards,
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > > Adam Sulmicki
> > > > http://www.eax.com The Supreme Headquarters of the 32 bit
> > > registers
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > Linuxbios mailing list
> > > > Linuxbios at clustermatic.org
> > > > http://www.clustermatic.org/mailman/listinfo/linuxbios
> > >
> > >
> >
> >
> > --
> > Adam Sulmicki
> > http://www.eax.com The Supreme Headquarters of the 32 bit registers
> >
> >
> > _______________________________________________
> > Linuxbios mailing list
> > Linuxbios at clustermatic.org
> > http://www.clustermatic.org/mailman/listinfo/linuxbios
> >
>

-- 
Adam Sulmicki
http://www.eax.com 	The Supreme Headquarters of the 32 bit registers