Thank you for your great job.
Finally i found a great library and it work at the first try 
I found an error in the documentation (i think). For the ArdGrafix6100_Philips::WriteCommand and ArdGrafix6100_Philips::WriteData functions, there is the same comment below:
« *the main difference with WriteData is that the first bit of SPI transmission (done by bit-banging) is set low »
But i think is incorrect for one of both
Thank you again.
PS: sorry for my bad English
Piferrari