    
    Tested with and without AVRISP mkII hooked up, works fine both
    ways.
-  
+   
+   Additionally tested on ATtiny84 using 8MHz internal clock. To
+   enable this functionality, you must alter the USI_TWI_Master.h
+   file in the TinyWireM library to run at 8MHz. Search for the 
+   line near the top that reads:
+   #define SYS_CLK   1000.0  // [kHz]	Default for ATtiny2313
+   and change the 1000 to 8000. 
+   
+   Also tested with 10k ohm pull-up resistors on SDA and SCL lines.
+   
   This demo also uses a regular LED attached to 
   ATtiny84 physical pin 2 (Arduino pin 10) to show 
   that the sketch is running. 

  sevenseg.writeDisplay(); // push data to display
  delay(500);
  sevenseg.clear(); // clear display before writing raw digit
  // The clear command doesn't need a writeDisplay call afterwards
  
  // Example of writing a single digit to a specified position on the

  It requires the TinyWireM library for I2C communication
  and the Tiny_LEDBackpack library for the various display
  functions.  
  TinyWireM library obtained from http://www.scenelight.nl/?wpfb_dl=22
  
   NOTE: Tested successfully on ATtiny85, using 4700ohm pull-up
   resistors on SCL and SDA lines. Tested using 1MHz internal clock.
