Console serial speed

[Aaron Wohl]

On 25 Jul 2003 13:06:28 -0500, "Russell Cattelan" <cattelan at xfs.org>
said:
> How does one set the serial speed of the console.
> I changed the boot loader speed to 57600 in make.conf
> but the kernel seems to chose random speeds each time 
> it's booted.
> Sometimes it's 9600 sometimes it 115200 other times 
> it's 38400.
> 
> Note this is on 5.x current
> 
> Russell Cattelan
Subject  notes on setting up freebsd serial console 
-must be com1
-com1 must be at port 0x3F8 irq 4
-in bios set the port and irq as above
-in bios set serial redirection to com1
-in bios set baud rate 115200
-in bios set RTS/CTS flow control
-edit (or create) /etc/make.conf to add these lines:
BOOT_COMCONSOLE_PORT=   0x3F8
BOOT_COMCONSOLE_SPEED=  115200
-cd /sys/boot
-make clean
-make
-make install
-fdisk -B
No im not kidding.  Part of the boot knowing baud rate loader lives in
the main disk boot block.
-cd /boot
-edit loader.conf
-add a line:
console=comconsole
-edit /boot.config make it read (with a return after it):
-Dh
(the above is minus D h return, thats 4 characters)
-cd /usr/src/sys/i386/conf
-edit PASODOBLE (or whatever your kernconf is called)
-add:
options               CONSPEED=115200         # Console Redirection
-cd /usr/src
-make buildkernel KERNCONF=PASODOBLE
-make installkernel KERNCONF=PASODOBLE
-reboot
-pray