Interface AT93CXX EEPROM/Arduino

Has anyone on the board interfaced a 4-wire serial AT93CXX or similar 4 wire serial EEPROM to the Arduino? If so, could you post code?

I've have a few 93LC86 from Microchip that I was trying to interface, building the C code based on the data sheet and an Atmel application note on interfacing another MCU series to this EEPROM family using assembly language. However, either because of timing or other issues on the coding side, the setup doesn't seem to work. The tutorial on the Arduino site is for an SPI EEPROM, but I'd rather start with what I have available to me...

93LC86C data sheet:
Atmel application note: Smart | Connected | Secure | Microchip Technology