Serial port direct access

["Miguel A. Rasero" <tecnico@bareacomunicaciones.com>]

Hi i am having trouble with a serial printer, i have tested anything
from the mailing list to do it work correctly but i haven´t obtained
positive results so i want to make a direct access to com1, i have
tested many ways to do this but i can´t use the COM1 name, ms-dos says
me that com1 isn´t a valid device name if i use direct access.i have
tested with and without serial support in linux kernel.

$_com1 = ""      
or
#$_com1 = ""     

$_ports = "fast range 0x3f8,0x3ff" 
or
$_ports = "device /dev/ttyS0 fast range 0x3f8,0x3ff"          
or
$_ports = "0x3f8"

$_irqpassing = "4"

Anyone can say me if this is normal? Or if i am doing anything
incorrect, i don´t know if direct access would give me the com1 dev name
in ms-dos or not, thank you by the help.

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