PCINOGAT.VXD is a replacement for PCI.VXD.

PCINOGAT.VXD does not try to turn off the GAT bit of the
Intel SIO chip set. If you have a problem when using DMA
devices like floppy or playing an AVI file with a DMA sound
card, and you have a system device named "Intel 82378 SIO
PCI to ISA bridge", you may want to try this PCI.VxD instead.

To try the replacement driver, make a copy of your existing
PCI.VXD, copy PCINOGAT.VXD to PCI.VXD, and restart your system.

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PCIIDE.VXD is a replacement for PCI.VXD

PCIIDE.VXD includes special code to detect disabled IDE controllers
when running in native PCI mode.  If you are not running with 32 bit
disk access, and device manager shows a PCI IDE controller
in conflict (code 15), you may want to try this PCI.VxD instead.

PCIIDE.VXD includes special code to enable the minimum amount of
resources on a PCI device.  If you are getting GP Faults and
Blue Screens on bootup, and Safe Mode shows an AIC-25PC10 or
other PCI IDE Hard Disk Controller, you may want to try this PCI.VxD
instead.

To try the replacement driver, make of copy of your existing
PCI.VXD, copy PCIIDE.VXD to PCI.VXD, and restart your system.