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PTCD(4)                    Kernel Interfaces Manual                    PTCD(4)

NAME
     ptcd -- support for the Protech PS3100 cash drawer port

SYNOPSIS
     ptcd* at isa? port 0x48d
     gpio* at ptcd?

DESCRIPTION
     The ptcd driver controls the cash drawer port of the Protech PS3100 point
     of sale terminal using the GPIO subsystem.

     ptcd provides a GPIO device with two pins: pin 0 is used to control the
     cash drawer while pin 1 can be used to read the current state of the
     sense input pin.  A logical 0 means the cash drawer is closed, a logical
     1 means the cash drawer is open.

     To open the cash drawer, set pin 0 to logical 1 for a short period of
     time (e.g. < 1 sec) and then reset the pin to logical 0.

SEE ALSO
     gpio(4), ibmcd(4), gpioctl(8)

HISTORY
     The ptcd driver first appeared in NetBSD 6.1.

AUTHORS
     The ptcd driver was written by Marc Balmer <marc@msys.ch>.

CAVEATS
     As it is not possible to detect the hardware at runtime, this driver,
     when enabled, will always attach.  Only enable it in your kernel
     configuration if you have the proper hardware.

NetBSD 7.1.2                   December 17, 2012                  NetBSD 7.1.2