Read string of 200 characters - NASM

[DXNNX]

i need generate a program that say if a word is palindrome or not, but the specification of my word say that the max length of the string is 200, but the getstr of io.mac the max is 81, anyone know a alternative to manage a string of 200 characters

here my code

%include "io.mac"

.DATA ;data segment

req    db  "String: ",0 ;text to show

tex times 200 db 0 ;



.CODE

        .STARTUP

        PutStr req;

        GetStr tex

        PutStr tex;

        .EXIT