---------------------------------------------------------------
Multifunction card - Some possible switch functionalities
---------------------------------------------------------------

Serial port #1 - enabled or disabled
Serial port #1 - I/O base address 3F8 or 2F8
Serial port #1 - IRQ4 or IRQ3

Serial port #2 - enabled or disabled (#2 requires a UART to be fitted into empty socket)
Serial port #2 - I/O address 3F8 or 2F8
Serial port #2 - IRQ4 or IRQ3

Parallel port - enabled or disabled
Parallel port - I/O base address 378 or 278 or 3BC - switch 1 of 2
Parallel port - I/O base address 378 or 278 or 3BC - switch 2 of 2
Parallel port - IRQ7 or IRQ5

Real time clock - enabled or disabled
Real time clock - I/O base address xxx or yyy
Real time clock - IRQ enabled or disabled
Real time clock - IRQx or IRQy