IOCTL_INTERNAL_INIT_1284_3_BUS IOCTL

Major Code:

IRP_MJ_DEVICE_CONTROL

Description

The IOCTL_INTERNAL_INIT_1284_3_BUS request initializes and assigns an IEEE 1284.3 device ID to all the 1284.3 daisy chain devices that are attached to a parallel port.

Windows 2000 supports from zero to four daisy chain devices and an end-of-chain device simultaneously attached to a parallel port. Windows XP supports from zero to two daisy chain devices and an end-of-chain device simultaneously attached to a parallel port.

Note This request is included primarily for test purposes, and Microsoft does not recommend using it during the normal operation of a parallel port.

For more information, see Device Stacks for ParallelPorts and Devices.

Parameters

Major code

IRP_MJ_INTERNAL_DEVICE_CONTROL

Input buffer

None.

Input buffer length

None.

Output buffer

None.

Output buffer length

None.

Input/output buffer

Input/output buffer length

Status block

The Information member is set to zero.

The Status member is set to one of the generic status values returned by internal device control requests for parallel ports.

See also

IOCTL_INTERNAL_SELECT_DEVICE

IOCTL_INTERNAL_DESELECT_DEVICE