y=mx+b

push ioa -
mov iob grc -
mov grc drc -
mov 0 ioc -
mov grc ioc -
mov 1 gra -
mov 4 grc -
mov grc dra -
push -
    pop -
    mov 0 grb -
    mov 0 grc -
    push 15 -
    pop jmp -
        inc grb -
        add grc gra grc -
        com != grb stk -
    mov drc grb -
    add grc grb grc -
    mov gra ioc -
    mov grc ioc -
    inc gra -
    push 10 -
    pop jmp -
    push dra -
    com != gra stk
halt