(program to turn AIM 65 into an octal inverter)

 
  ROCKWELL AIM 65

(enter program)


<*>=0200

<I>
 0200    LDA #FF    A9 FF
 0202    STA A002    8D 02 A0      (A002 is the port B direction register)
 0205    LDA #00    A9 00          
 0207    STA A003    8D 03 A0      (A003 is the port A direction register)
 020A    LDA A001    AD 01 A0      (A001 is the port A data register)
 020D    EOR #FF    49 FF          (use 'EOR #FF' command to invert all bits)
 020F    STA A000    8D 00 A0      (A000 is the port B data register)
 0212    JMP 020A    4C 0A 02      (loop back to the read port A instruction)
 0215

(run the program)

<*>=0200

<G>/

(notice that the cursor does not return, because the program never ends)

(to test the program, apply a logic signal to port Ax and check that the 
logic signal appears inverted at port Bx -- where x is 0,1,2,...,7)

(to recover control of the computer hit reset on the motherboard)