[lcd4linux] help Wiring a large display?

[Ognjen B. <og...@ma...>]

HI all,

I just bought a 4x40 LCD display to wire up for lcd4linux, and i want to 
ask a few questions as this is my first experience with such a large lcd.

First things first, the LCD does not have 14 or 16 pins, but 18 (not 
including two for the backlight), what are the extra 4 pins for? i 
couldnt find any schematics for this display either on lcd4linux or 
lcdproc. Are the  schematics the same for all lcd sizes regardless of 
number of controllers in use?

I read about the dual enable lines, is there a schematic for this wiring 
anywhere?

Does this lcd require 8-bit mode? or can it use any of the others as 
well (4-bit, winamp, etc...)

Also the backlight has its own dedicated connector on it with an 'A' and 
a 'K' on each side and a 5V+ sign in the middle (i presume this might be 
a EL backlight as opposed to a normal LED one). Whats does the A and K 
mean, and which one is the positive (dont want to fry this, it wasnt 
cheap) and does it need a resistor or something(from what i know EL 
backlights are somewhat more fragile then led's)?

And help appreciated