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Windows NT version 3.1 should run on PCI bus computers if its SCSI and video adapters are non-PCI or have a PCI driver specifically designed for Windows NT version 3.1.
Peripheral Component Interconnect (PCI) standard is a local-bus technology that is becoming increasingly common in new desktop computers. A blueprint or specification rather than something physical, it is a method of holding together PC components--the processor, memory, hard disk, etc.--that makes PCI computers and peripherals differ from other computers and peripherals currently available.
The March 1994 Windows NT Version 3.1 hardware compatibility list includes a number of PCI bus computers. In general, Windows NT 3.1 should work on PCI computers. The current Windows NT hardware abstraction layer (HAL) does not support PCI functionality, but should allow Windows NT to run in a mode that is ISA/EISA compatible.
If an adapter is working under Windows NT 3.1, it probably is running in a non-PCI or ISA/EISA compatible mode. Problems are most likely to arise with PCI adapters rather than PCI computers.
Support Issues for PCI Adapters