Where the SYS_TERMIOS and SYS_READ store the keystroke?

I recently want to make SYS_READ() just take 1 keystroke, some people suggest using SYS_IOCTL() to manipulate termios flag. I already tried it but the value i expected is not what i like... this is some the code i have :

    ;Get current settings
    Mov EAX, 54             ; SYS_ioctl
    Mov EBX, 0              ; STDIN_FILENO
    Mov ECX, 0x5401         ; TCGETS
    Mov EDX, termios
    Int 80h

    ;And byte [c_lflag], 0xFD  ; Clear ICANON to disable canonical mode
    ;This have 2 varian choose uncomment if one of this doesn't work;
    And dword [c_lflag], 0xFFFFFFFD  ; Clear ICANON to disable canonical mode

    ; Write termios structure back
    Mov EAX, 54             ; SYS_ioctl
    Mov EBX, 0              ; STDIN_FILENO
    Mov ECX, 0x5402         ; TCSETS
    Mov EDX, termios
    Int 80h

    Mov EAX,3   ;sys_read kernel call
    Mov EBX,0   ;stdin trap (standart input)
    Mov ECX,Nada    ;Masukkan jumlah buffer yang akan ditampung, Enter = ECX
    Mov EDX,1   ;Jumlah byte yang dibaca
    Int 80h     ;Call Kernel

    Cmp EAX,0
    Je _start

    Cmp ECX,0x49
    Je Do_C

    Cmp ECX,0x50
    Je Re_D

    Cmp ECX,0x51
    Je Mi_E

    Cmp ECX,0x52
    Je Fa_F

    Cmp ECX,0x53
    Je Sol_G

    Cmp ECX,0x54
    Je La_A

    Cmp ECX,0x55
    Je Si_B

    Cmp ECX,0x56
    Je Do_C.
    Jmp Error

PS: I some the code i already asked in Termios can't run, Read key input using sys_call, and for the latest code in My GitHub.
Thanks for the help...