OpenFirmware payload on coreboot mk2 with correct baud rate

ok show-devs
/cpus
/dropin-fs
/flash@1980080
/isa
/ega-text
/pci
/dropin-fs
/memory
/aliases
/options
/openprom
/chosen
/packages
/cpus/cpu@0
/isa/ethernet@i300
/isa/ide@i1f0
/isa/rtc@i70
/isa/8042@i60
/isa/parallel@i378
/isa/serial@i2f8
/isa/serial@i3f8
/isa/timer@i40
/isa/interrupt-controller@i20
/isa/dma-controller@i00
/isa/ide@i1f0/disk
/isa/8042@i60/mouse@aux
/isa/8042@i60/keyboard@kbd
/packages/http
/packages/tcp
/packages/httpd
/packages/telnet
/packages/ip
/packages/nfs
/packages/mux
/packages/16550
/packages/dropin-file-system
/packages/zip-file-system
/packages/ext2-file-system
/packages/disk-label
/packages/iso9660-file-system
/packages/fat-file-system
/packages/obp-tftp
/packages/deblocker
/packages/stringio
/packages/terminal-emulator
/packages/client-services
ok printenv
Variable Name         Value                          Default Value

ramdisk               a:\initrd.imz                  a:\initrd.imz
ramdisk
usb-delay             0                              0
http-proxy
pci-probe-list        0,1,2,3,4,5,6,7,8,9,a,b,...    0,1,2,3,4,5,6,7,8,9,a,b,...
client-symbols?       true                           true
fcode-debug?          true                           true
ip-address            dhcp                           dhcp
ip-router
ip-domain
ip-netmask            255.255.255.0                  255.255.255.0
ip-dns-server
local-mac-address?    true                           true
oem-logo
oem-logo?             false                          false
oem-banner
oem-banner?           false                          false
output-device         com1                           com1
input-device          com1                           com1
load-base             16777216                       16777216
boot-command          boot                           boot
auto-boot?            true                           true
watchdog-reboot?      false                          false
diag-file
diag-device           net                            net
boot-file             root=/dev/ram0 mount_ram...    root=/dev/ram0 mount_ram...
boot-device           a:\vmlinuz                     a:\vmlinuz
ansi-terminal?        true                           true
screen-#columns       80                             80
screen-#rows          34                             34
silent-mode?          false                          false
use-nvramrc?          false                          false
nvramrc
security-password
security-#badlogins   0
security-mode         none
diag-switch?          false                          false
ok