In any case, from the description:
Luckily I found an Ebay auction which offered an IBM 5170 mainboard for a very reasonable price.
I proceeded to draft modern KiCad schematics for the 5170 and subsequently modified the IBM designs to suit this project as much as possible.
[1]: https://en.wikipedia.org/wiki/IBM_Personal_Computer_AT
In any case, from the description:
Luckily I found an Ebay auction which offered an IBM 5170 mainboard for a very reasonable price.
I proceeded to draft modern KiCad schematics for the 5170 and subsequently modified the IBM designs to suit this project as much as possible.
[1]: https://en.wikipedia.org/wiki/IBM_Personal_Computer_AT