// Constants
%define testRegister 240
%define dataLEDRegister     255

// put 1 in memory location 240
copylr 1 testRegister

// put 1 in the accumulator
copyla 1 

// display the contents of the accumulator
copyar dataLEDRegister

// blank display
copylr 0 dataLEDRegister

// display contents of memory location 240
copyrr testRegister dataLEDRegister 

// add value at memory location 240 to accumulator (should be 1)
addra testRegister

// blank display
copylr 0 dataLEDRegister

// and display the contents of the accumulator (should be 2, but is 241)
copyar dataLEDRegister