It is a bit annoying how the lcd puts those lines in the wrong place. That way you have to manually keep track of where your cursor is or read from the display every time you check if it should do a line wrap. I guess that is what you get for using a driver that has been designed for driving 1 and 2 line displays.

Actually that is more than 100 pins. You are gonna need some female headers to work with it since it's all male and you don't want to solder directly to the board. On the CD there should be a pinout. Otherwise check zilog's website for a datasheet of the kit.

I'm almost able to interface with my lcd display. I have to put a lot of delay in the program since it is a really slow display. When I step trough the program in debug mode it works find and I can initialize the LCD module and put characters on it

Might not fit. Maybe something a bit smaller.

Lol. Well I would rather have a fully functional one in my collection.

It was worth a try, but of course it was a gamble. Because of the horrible way they designed the calculator the screen is not servicable. I could easily have fixed it otherwise. Two ribbon cables and in order to get to the vertical one I had to desolder the horizontal one which did not end well.

So I tried reflowing some solder on the horizontal ribbon cable, but it did not affect it. Then I found out there was another cable going to the screen for the vertical lines. That must be it, but the way it is designed means I have to desolder the horizontal ribbon in order to get to the vertical one.