[SeaBIOS] [PATCH 3/3] add serial console support
kevin at koconnor.net
Tue Jul 5 17:23:26 CEST 2016
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:
> 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.
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