PCXT Hardware - Maverick-Shark/retroGuru GitHub Wiki

IBM 5160 Switch/Jumper Settings

https://www.minuszerodegrees.net/5160/misc/5160_motherboard_switch_settings.htm

IBM PC and XT DIP Switch Settings

https://dosdays.co.uk/topics/xt_dip_switches.php

8255 PPI (Programmable Peripheral Interface)

https://github.com/jotego/jt8255/blob/master/hdl/jt8255.v

https://github.com/EL-SHREIF/PPI-Project-
https://github.com/zyad19975/PPI-Intel-8255A