From: Kevin O'Connor <kevin@koconnor.net>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: seabios@seabios.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [SeaBIOS] [PATCH 3/3] add serial console support
Date: Tue, 5 Jul 2016 11:23:26 -0400 [thread overview]
Message-ID: <20160705152326.GA7527@morn.lan> (raw)
In-Reply-To: <1467731228.12358.45.camel@redhat.com>
On Tue, Jul 05, 2016 at 05:07:08PM +0200, Gerd Hoffmann wrote:
> I also hacked up a patch to send output to both vga + serial:
>
> https://www.kraxel.org/cgit/seabios/commit/?h=serial&id=3afd7b8bb96126b00989f3ae09f451bbec4f00f7
>
> Not working stable though, seems to corrupt memory, not sure why.
> I'm storing the vgabios int10 vector at 0x5f, then chain-call into
> vgabios via "int 5f" instruction. Anything obviously wrong with that?
Not sure why it isn't working. Take a look at
vgaentry.S:entry_timer_hook and vgainit.c:hook_timer_irq() though.
That shows a working example of "hooking" an interrupt.
As an aside, I think it would be better if save/restoring the BDA
cursor position could be avoided.
-Kevin
next prev parent reply other threads:[~2016-07-05 15:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-04 20:39 [Qemu-devel] [PATCH v2 0/3] seabios: add serial console support Gerd Hoffmann
2016-07-04 20:39 ` [Qemu-devel] [PATCH 1/3] std: add cp437 to unicode map Gerd Hoffmann
2016-07-05 13:49 ` [Qemu-devel] [SeaBIOS] " Kevin O'Connor
2016-07-04 20:39 ` [Qemu-devel] [PATCH 2/3] kbd: make enqueue_key public, add ascii_to_keycode Gerd Hoffmann
2016-07-04 20:39 ` [Qemu-devel] [PATCH 3/3] add serial console support Gerd Hoffmann
2016-07-05 14:30 ` [Qemu-devel] [SeaBIOS] " Kevin O'Connor
2016-07-05 15:07 ` Gerd Hoffmann
2016-07-05 15:23 ` Kevin O'Connor [this message]
2016-07-05 8:06 ` [Qemu-devel] [PATCH v2 0/3] seabios: " Daniel P. Berrange
2016-07-05 10:00 ` Gerd Hoffmann
2016-07-05 10:07 ` Daniel P. Berrange
2016-07-05 11:45 ` Paolo Bonzini
2016-07-05 11:59 ` Daniel P. Berrange
2016-07-05 11:15 ` Paolo Bonzini
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