Is here way to have 9600+ serial console and see boot0 message?

[Dimitry Andric]

On 5 Sep 2018, at 19:22, Lev Serebryakov <lev at FreeBSD.org> wrote:
> 
> On 05.09.2018 20:19, Allan Jude wrote:
> 
>>> I want to have my serial console 115200 (of course), *including* BIOS
>>> redirection (which goes before boot0sio).
>>> 
>>> But boot0sio supports only speeds up to 9600 (due to int 14h limitations).
>>> 
>>> Is it possible to solve this clash somehow?
>> 
>> /boot/loader reads /boot.config where you can put -S115200
> I think, /boot/boot reads /boot.config, and it works for me.
> 
> My question is somewhat more tricky: I have 115200 BEFORE boot0sio
> (from BIOS) and I have 115200 AFTER boot0sio (from /boot/boot and
> /boot/loader later). And I want to see "F1 / F2" boot selection from
> boot0sio.

Recompile stand/i386 with BOOT_BOOT0_COMCONSOLE_SPEED=115200, I would
normally say, but apparently stand/i386/boot0 is limited to a maximum
of 9600 baud.  This looks like a BIOS int 0x14 limitation. :(

-Dimitry

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