gudt/docs/E1_ioport.md

I/O Port

Node format

Offset	Size	Description
0	1	type = 0xe1
1	1	flags = 0
2	2	parent node
4	4	IO port size
8	8	IO port address

JSON format

{
    "type": "IOPORT",
    "parent": (string) parent device's name,
    "size": (number) IO port size,
    "base": (number) IO port address
}