Im have trouble trying to calulate this 3a-4c. The program calculate only 3*a and produces no errors.
call getPos
M1 dw ?
mov M1, AX
call crlf
call getPos
M2 dw ?
mov M2, AX
call crlf
call getPos
M3 dw ?
mov M3, AX
call crlf
mov BX, 2
mov CX, 3
mov DX, 4
mov AX, M1
mul CX
mov SI, AX
mov AX, M3
mul DX
mov DI, AX
sub SI, DI
mov AX, SI
call putPos
mov ah, 04c
int 021
include ioSubs.inc