Two variables can be passed to the device file
1) SPEED -> defines the devices speed, will default to fastest speed option
2) A_bits -> Defines the Adress and Memory array size, defaults to 14

The variable A_bits is used to define the size of the IO memory array and address
array, using 2 ^ A_bits.  One thing to note is that the address array will store the 
whole address used to write.  This means all address bits are usable.  Also note
that if the user sets A_bits to the same size as the number of address bits this
will define two memory elements at total device capacity.  