No issue here with Win10 1809 x64 and the MR series, at least before I started using them them as slaves. The key thing is to use a TI Chipset card with a 1394B port (FW800). Some good cards out there for under £50.00. https://www.scan.co.uk/products/lycom-pe-107-pci-e-2-port-firewire-800-(1394b)-and-1-port-firewire-400-(1394a)-card
Usually they’ll have 2 FW800 and 1x FW400 port. You’ll also need to get a FW 400 to 800 cable.
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