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Need Help updating custom API Interface to VME-MXI-2

Need Help.

I have a custom Visual C++ 6.0 application that interfaces to the VME-MXI-2 card.

This interface works on older machines, but when we upgrade to new PC's, the interface works, yet it appears that communication exists between the hardware board, and the PC Card appears to be working properly.

 

I suspect that the drivers have a different interface, but need the interface documentation in order to verify this, can you help?

 

Older machines use: PCI-MXI-2, and the driver is: C:\Windows\System32\Drivers\vvxid.sys (File version 1.2) cpright 1996-2000

Newer machine has: PCI-MXI-2, and the driver is: C:\Windows\System32\Drivers\nipalk.sys (File version 1.61f0) cpright 2002

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