bf145afe_Chapter_24__Configuring_ELILO__Description
[Parameter] com1=,DPS,, [Description] 
com1= sets the parameters for the first serial line. For example, com1=9600,8n1,0x408,5. The io_base and irq options can be omitted to leave them as the standard defaults. The baud parameter can be set as auto to indicate the boot loader setting should be preserved. The com1 parameter can be omitted if serial parameters are set as global options in ELILO or in the EFI configuration.
Chapter 24. Configuring ELILO