[castigero]

I'm trying to perform simple subtraction in a MARIE simulator, but for some reason the command for the subtraction is not working. Any help would be greatly appreciated.

Here's the commented code

 clear  /sets accumulator to zero
 store SUM /sum starts at zero
 input  /inputi1 value
 storei 1 
 input  /input i2 value
 storei 2
 loadi 1
 subti 2  /i1 - i2
 store SUM /put new SUM to memory
 load SUM
 output  /output SUM
 halt
SUM, DEC 0
i1,  DEC 0