I have recently bought Sparkfun’s Serial Graphic LCD 128x64 (http://www.sparkfun.com/products/9351)
Accrding to it’s documentation it only has a buffer of 416 bytes so it is quite easy to overflow the buffer and get garbage printed on the screen. The firmware does not make provision for any flow control to overcome this problem so you have to build in all kinds of delays to prevent this from happening.
Furthermore some of the functionsare relatively slow, there’s no provision for an extra font or use of pictures / sprites.
I have however found “new” firmware here: http://sourceforge.net/projects/serialglcd/
It elliminates the above problems and short-comings amongst other fixes / additions.
A write-up about it can be found here: http://tenet.dl.sourceforge.net/project/serialglcd/README
My PROBLEM is that I do not know how or have the tools to compile the firmware and to flash the backpack. :-[
Is there anyone here who would be able to help with compiling it and perhaps even write a little “flash” app for Windows?