The SDEC LCD Driver
The SDEC LCD modules are fitted to the Watchguard Firebox firewall appliances. Watchguard identifies these units by the X-Core, X-e and X-Peak product lines. The model number indicates a software license level, and has no bearing on the hardware configuration.
This driver implements the same protocol as the HD44780 with lcm162 connection type.

Features
The SDEC LCDs are interfaced to the appliance using a parallel port. All lines are hard-wired by Watchguard. The LCD displays are 20 characters wide and 2 lines high, and have 4 buttons: Up, Down, Left, and Right. The SDEC model number is LMC-S2D20-01. There is a back light that can be controlled by software. Due to its low half-life, the driver tries to keep the light off a short while after buttons have been pressed.
For more detailed information about the SDEC LCD, locate the technical and programming guide LMC-S2D20-01.pdf. The manufacturer web site is: SDEC home page