They did try to keep the lock in, with the release of PS/2 and MCA architecture, which many think it relates only to keyboard and mice ports. However it was to

They did try to keep the lock in, with the release of PS/2 and MCA architecture, which many think it relates only to keyboard and mice ports. However it was too late to regain control and PS/2 alongside MCA was largely ignored. https://en.wikipedia.org/wiki/IBM_PS/2 https://en.wikipedia.org/wiki/IBM_PS/2