Assuming that the trainer kit's port 0 is the output port, here is an example program in x86 assembly language that multiplies the content of the AL register by 5 using a loop:
; Set up the data segment and variables
segment data
multiplier db 5 ; constant multiplier for the loop
result db 0 ; initialize the result variable to 0
endseg
segment code
assume cs:code, ds:data
start:
; Load the value to be multiplied into AL
mov al, 7
; Multiply AL by 5 using a loop
mov cl, multiplier ; load the multiplier into CL
mov bl, al ; move the value of AL into BL for intermediate calculations
multloop:
add al, bl ; add the value of BL to AL, effectively multiplying it by 2 in each iteration
dec cl ; decrement the loop counter
jnz multloop ; jump back to the loop if the counter is not zero
; Store the final result in the result variable
mov result, al
; Output the result to port 0 in the trainer kit
out 0, al
; Halt the program
hlt
end start
Write an assembly program that:
- Multiply the content of AL by 5. Use a loop to implement the multiplication (Do not use MUL or IMUL).
- The result will be shown in port 0 in the trainer kit.
1 answer
1 answer