using 8086 assembly language and NASM assembler error

write a program which will:

Display an appropriate prompt.

Input a signed base 8 integer from the keyboard

If an invalid character (that is, not in the range '0'-'7') is input, erase the character by printing a backspace char (ASCII code 8), a blank (' ') and another backspace and do not attempt to convert the invalid character.

Convert the characters as they are input into the equivalent binary number stored in register BX

Overflow processing is NOT necessary.

Display another appropriate prompt.

Output the base-2 form of the binary number in register BX.

If the user indicates a negative number is being input, remember that fact, read the number as an absolute value, then negate it when input is finished.

Sample input/output:

Enter a base-8 number: 10 The binary number is: 0000000000001000

Another input/output sample:

Enter a base-8 number: -1234 The binary number is: 1111110101100100

i wrote the code but getting error and dont know why

can you please edit this code with the correct one and tell me where is my error and please attach pictures improve that your code is working fine.

show the input and output please