Altos 1100 Series User’s Guide2-26
IRQ
This function lets you assign an interrupt for serial port 2. The options are IRQ 3
and 4. The default setting is 3.
If you assign 3F8h to serial port 1, you may
only assign 2F8h or 2E8h to serial port 2.
If you assign 2F8h to serial port 1, you may
only assign 3F8h or 3E8h to serial port 2.

Parallel Port

This parameter allows you to enable or disable the parallel port.
Base Address
This function lets you set a logical base address for the parallel port. The options
are:
• 3BCh• 378h• 278h
The default setting is 3BCh.
IRQ
This function lets you assign an interrupt for the parallel port. The options are
IRQ 5 and 7.