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Date: Wed, 14 May 2014 13:54:34 +0200
From: Laszlo Ersek <lersek@redhat.com>
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Subject: Re: [Qemu-devel] Where is vga-rom mapped in guest system memory?
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To: Jaeyong Yoo <jaeyong.yoo@samsung.com>, qemu-devel@nongnu.org

On 05/14/14 13:41, Jaeyong Yoo wrote:

> I built the seabios in qemu and try to see the debug message of seabios.
> So, I checked the "Serial port debugging" option in Debugging section w=
ith the=20
> serial port base address 0x3f8. (Is this the correct value?)
> And, launch qemu with option "-serial stdio" but I don=E2=80=99t see an=
y messages from
> seabios. If I want to see the debug message of seabios to the output co=
nsole,
> what am I missing?
>=20
> My full command for launching qemu is the following:
> $ sudo x86_64-softmmu/qemu-system-x86_64 -enable-kvm -m 1024 -vga vmwar=
e -serial stdio ~/data/qemu-images/ubuntu-13.04-desktop.img

I rely on the qemu debug port rather than on serial:

  -debugcon file:debug.log -global isa-debugcon.iobase=3D0x402

Check the DEBUG_IO and DEBUG_LEVEL settings in the SeaBIOS config as well.

Laszlo