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- DOCUMENT:Q103411 17-NOV-1993 [W_NT]
- TITLE :Windows NT Parallel Ports Do Not Use Interrupts
- 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
- ----------------------------------------------------------------------
-
- In Windows NT, parallel ports do not use any hardware interrupt
- request lines (IRQs).
-
- The Windows NT parallel port driver is thread-based, and the port is
- polled at background priority. This eliminates a number of potential
- hardware conflicts with other devices that might want to use IRQ 7 or
- 5, which used to be the parallel port interrupts.
-
- NOTE: If you boot OS/2 or MS-DOS, you still need to check for IRQ
- conflicts; the Windows NT port driver will not be used.
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: PRT
-
- =============================================================================
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-
- Copyright Microsoft Corporation 1993.