ULPT(4) Device Drivers Manual ULPT(4)

ulpt — USB printer support

ulpt* at uhub?

The ulpt driver provides support for Universal Serial Bus (USB) printers that follow either the USB printer uni-directional or bi-directional protocol.

Additional bits OR-ed in the minor device number with the unit number select various features of the driver:

0x40 Do not initialize (reset) the device on the port.

Some printers cannot handle the reset on open; in case of problems try the ulpn device.

/dev/ulpt?
USB printer with reset on open
/dev/ulpn?
USB printer without reset on open

lpt(4), usb(4)

USB Device Class Definition for Printing Devices, USB Implementors Forum, http://www.usb.org/developers/devclass_docs/usbprint11.pdf, January 2000.

The ulpt driver appeared in NetBSD 1.4.

May 16, 2009 NetBSD 11.0