PCKBC(4) BSD Kernel Interfaces Manual PCKBC(4)
pckbc -- PC (ISA) keyboard controller driver
pckbc* at isa? flags 0x00 (alpha, amd64, i386, loongson)
pckbc* at ebus? (sparc64)
pckbd* at pckbc?
pms* at pckbc?
The pckbc driver handles resource allocation and device attachment for
the traditional PC/AT keyboard controller. It provides two logical con-
nections for child devices, the ``keyboard'' slot for a keyboard and the
``auxiliary'' slot for mice (the latter might be missing in older key-
To avoid attaching a phantom PS/2 keyboard device, the pckbc driver will
attempt to detect USB legacy keyboard emulation on amd64 and i386 sys-
tems. Unfortunately, the detection heuristics may fail on older systems
with a real PS/2 keyboard. The keyboard can be forced to attach on these
systems, by changing the device flags to 1.
ebus(4), intro(4), isa(4), pckbd(4), pms(4), boot_config(8)
BSD April 30, 2017 BSD