PS/2-like controller driver
gsckbc* at gsc? irq 26
pckbd* at gsckbc?
pms* at gsckbc?
gsckbc driver handles resource
allocation and device attachment for the PS/2 input device ports. Each
gsckbc driver provides the logical connection for
one child device, either the “keyboard” port or the
gsc(4), pckbd(4), pms(4)