INT 21 - Trusted Access - NB.SYS - GET STATE AH = 3Fh BX = file handle for device "$$NB$$NB" CX = 0002h (size of state) DS:DX -> buffer for state record (see #01414) Return: CF clear if successful AX = number of bytes actually read (0 if at EOF before call) CF set on error AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h) Program: Trusted Access is a security and access-control package by Lassen Software, Inc.; NB.SYS is a device driver to prevent the user from terminating CONFIG.SYS or AUTOEXEC.BAT with Ctrl-Break SeeAlso: AH=40h"NB.SYS",AX=4101h Format of Trusted Access state record: Offset Size Description (Table 01414) 00h BYTE 00h off, 01h on 01h BYTE keys being disabled bit 0: Ctrl-Break bit 1: SysReq bit 2: Ctrl and Alt bit 3: Ctrl-Alt-Del bit 7: all keys (overrides other bits)