Int 21/AH=40h

Trusted Access - NB.SYS - SET STATE

AH = 40h
BX = handle for character device "$$NB$$NB"
DS:DX -> state record (see #01414)
CX ignored

Return:
CF clear if successful
AX = number of bytes actually written
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

See Also: AH=3Fh"NB.SYS"

Category: Security - Int 21h - T

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