x86 - comparing characters in assembly, nasm -


i trying input user , output text depending on user put in.

my issue reason thinks , dont know why. can find code below:

            bits 16             org 0x100             jmp main message:    db 'please enter a or b:',0ah,0dh,'$' character:  db 1 outp_a:     db 'it a',0ah,0dh,'$' outp_b:     db 'it b',0ah,0dh,'$' finish      db 'good bye',0ah,0dh,'$'  clearscreen:             mov dx, 10              mov bh, 0             mov ah, 2             int 10h             mov cx, 2000              mov bh, 0             mov bl, 01eh              mov al, 20h              mov ah, 09h             int 10h             ret  disply:                  mov ah,09h             int 21h             ret  get_input:  mov ah,01h             int 21h             ret  input_a:    mov dx,outp_a             call disply             ret input_b:    mov dx,outp_b             call disply             ret  compare:    mov cl,'a'             cmp [character],cl             jae input_a             mov cl,'b'             cmp [character],cl             jae input_b              ret  main:       call clearscreen             mov dx,message             call disply             call get_input             mov [character],ax             call compare             mov dx,finish             call disply             int 20h

jae means jump if above or equal, when compare 'a', jump taken character encoding greater or equal 'a'.

what want instead je, means jump if values same.


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