Hello everybody, i have some good news. I'm the One-Core-API creator and I and a friend what is main oca developer/debugguer are working about MSI interrupt system porting ACPI/PCI driver from Vista into NT5 (2000,XP and 2003). We have success to boot the system and part of PCI drivers are working. Other part of drivers not working, but we are trying fix that. Our target is atleast Vista RTM and we think is possible.And the main target is port/implement WDDM on NT5. Dark_fire, a amazing Reactos developer, told me what needed for make Dxgkrnl (main wddm driver) and Ndis6 driver work on NT5 is implement MSI interrupt, So, we're already halfway there. Some prints: