SainSmart 3.2" TFT LCD Mega 2560 available pins

Hi,
LCD connected to Arduino board with a shield. The connector is using all digital pins from Arduino board.
Does anybody know which of them are used by TFT LCD and SD devices?
AtMega2560 has 54 pins available, hard to belief that all of them are used by this display.
Thank you.

There is a post In this thread with a photo showing which pins are unused: Arduino Forum

EDIT: More specifically, this post: Arduino Forum

pYro_65:
There is a post In this thread with a photo showing which pins are unused: Arduino Forum

EDIT: More specifically, this post: Arduino Forum

Thank you,
looks like only 8 pins left available: 42 to 49