INT 2F - PRINDIR v9.0 - SET ECHO STATE AX = 7F0Ch DX = new state (00h echo off, 01h echo on) Return: AX = status 0000h successful SeeAlso: AX=7F00h"PRINDIR",AX=7F0Ah,AX=7F0Bh,AX=7F0Dh,AX=7F0Eh