I would like to control a display with a mega2560 that uses a max7219 connected to a 8 by 8 led array, 4 in all. I'm a fair c programmer with little CPP or Arduino experience. In the past I have always used PIC micros. I have found example code but I don't know which pins on the mega2560 to use for the spi bus.
Let me Google that for you "spi bus arduino pins mega 2560"
Well, it was in the SPI library reference all along SPI - Arduino Reference
What would happen to our society - and technical language - if Google went away? 
Just a thought ...