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- DOCUMENT:Q101502 19-JUL-1993 [W_NT]
- TITLE :INF: Device Driver Start Codes
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- ----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system, version 3.1
- - Microsoft Windows NT Advanced Server, version 3.1
- ----------------------------------------------------------------------
-
- Windows NT device drivers define the following start codes:
-
- - Boot
- - System
- - Auto
- - Demand
- - Disabled
-
- The text below provides additional details about each of these start
- codes.
-
- Boot
- ----
-
- The Boot start code indicates that the OS loader loads the driver at
- boot time before the executive system receives control. The disk
- driver for the system disk is an example of a Boot driver. If the
- system cannot load a Boot driver it cannot load the other drivers.
-
- System
- ------
-
- The System start code indicates that the I/O system loads the driver
- during initialization. The mouse driver is an example of a System
- driver.
-
- Auto
- ----
-
- The Auto start code indicates that the Service Controller loads the
- driver during its initialization. The parallel part driver is an
- example of an Auto driver.
-
- Demand
- ------
-
- The Demand start code indicates that the Service Controller loads the
- driver only when it is explicitly instructed to do so. By default,
- Windows NT does not use any Demand drivers. You might create a Demand
- driver by loading the parallel port driver only when you want to print
- a document or only when a specified printer is available.
-
- Disabled
- --------
-
- The Disabled start code indicates that the system does not load the
- driver. Windows NT sets the Disabled start code for all drivers in the
- system that it does not load (because corresponding hardware is not
- installed or for any other reason).
-
- Additional reference words: 3.10
- KBCategory:
- KBSubcategory: DEVDRVR
-
- =============================================================================
-
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-
- Copyright Microsoft Corporation 1993.