Acer AcerAltos 21000 System Manual page 112

Parallel Port
This parameter allows you to enable or disable the parallel port.
This function lets you set a logical base address for the parallel port.
The options are:
3BCh
378h
278h
This function lets you assign an interrupt for the parallel port. The
options are IRQ
5
4-26
Base Address
IRQ
and .
7
The Base Address and IRQ parameters are
configurable only if Parallel Port is enabled.
If you install an add-on card that has a parallel
port whose address conflicts with the parallel
port on board, the system automatically disables
the onboard functions.
Check the parallel port address on the add-on
card and change the address to one that does
not conflict.
AcerAltos 21000 System Guide