>
> puc0 at pci0 dev 15 function 0: SIIG Cyber Serial Dual PCI 16C550 (20x family) (com, com)
> com1 at puc0 port 0: interrupting at irq 10
> com1: ns16550a, working fifo
> com2 at puc0 port 1: interrupting at irq 10
> com2: ns16550a, working fifo
> puc1 at pci0 dev 16 function 0: SIIG Cyber Serial Dual PCI 16C550 (20x family) (com, com)
> com3 at puc1 port 0: interrupting at irq 9
> com3: ns16550a, working fifo
> com4 at puc1 port 1: interrupting at irq 9
> com4: ns16550a, working fifo
>
> The problem is that one of these two cards (I'm not sure if it's puc1 or
> puc0 at this point, but it shouldn't matter for the momment) Has the "4S"
> expander installed, which adds two more 16550s and two more serial ports.
> Anyone have any experience with these boards? Is there something special I
> need to do to get the other two coms to show up?

possibly all of them are 4-port just may or may not have this expander
(consisting of cables and plugs), but are defined in kernel as 2-port

try changing pucdata.c a bit