R DC 45
S DC 60
T DC 50
IN R1, =KBD
IN R2, =KBD
IN R3, =KBD
STORE R1, R
STORE R2, S
STORE R3, T
MUL R1, S
ADD R3, =600
ADD R3, R1
STORE R3, T
COMP R3, =3000
JNGRE, else
SUB R3, =2000
STORE R3, T
JUMP done
else ADD R3, =2000
ADD R3, S
STORE R3, T
done NOP
LOAD R1, R
LOAD R2, S
LOAD R3, T
OUT R1, =CRT
OUT R2, =CRT
OUT R3, =CRT
SVC SP, =HALT