[SeaBIOS] [PATCH 5/6] sercon: split-output implementation
Gerd Hoffmann
kraxel at redhat.com
Mon Sep 11 12:33:24 CEST 2017
On Fri, 2017-09-08 at 14:53 -0400, Kevin O'Connor wrote:
> On Fri, Sep 08, 2017 at 08:18:27AM +0200, Gerd Hoffmann wrote:
> > Allows to run the serial console in parallel with a vga display.
> > Output will show up on both vga and serial line.
> > Input will be accepted from both keyboard and serial line.
>
> [...]
> > + SET_LOW(sercon_enable, (mode == 0x03));
>
> [...]
> > + // sercon disabled - verify not 0x03 modeset and otherwise
> > exit
> > +3: popl %eax
> > + cmpw $0x0003, %ax
> > + jne 5f
>
> Minor note - I realized after I sent my last patch that doing:
>
> SET_LOW(sercon_enable, (mode <= 0x07));
I don't think so. 0,1,2,3,7 are text modes, but 4,5,6 not.
cheers,
Gerd
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