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

[Lev Serebryakov]

On 06.09.2018 18:31, Ian Lepore wrote:

>>> uart...  I tried this years ago, but overflowed 512 limits...
>>  I've tried it just now, and, yes, it needs space for another 18
>> commands to init UART…
>>
> 
> Did you miss the suggestion to set BOOT_BOOT0_COMCONSOLE_SPEED=0 in
> make.conf, so that whatever speed is configured in the BIOS is left
> unchanged?
 I've tried this. It doesn't help. I don't know why, but symptoms are
the same: after BIOS messages terminal (it is software one, of course)
clears, cursor moves chaotically without any real output, and this
behavior continues till I issue "Reset Terminal" command via terminal
program menu. After terminal reset all output (from loader, kernel and,
later, getty) shows normally.

 I've even dumped & disassembled new MBR code to be sure, that I
installed new version. Yep, it doesn't contain this call in the
beginning (after relocation).

-- 
// Lev Serebryakov