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This review is from: Rosewill 2 Ports PCIe Serial Card Model RC-301EU
Pros: Serial ports work. Windows 7 supported.
Cons: I'm using a shutter controller which is connected to one serial port and a Z-drive controller connected to the other serial port. Shutter requires null modem cable and the Z-drive straight. If I try to boot the computer with Win 7 and the null modem cable is connected, the computer will not boot!!! The second I disconnect the cable, booting process continues as normal. When the Windows has finished the boot process, I can reconnect the null modem cable and everything works normally.
Other Thoughts: I'm guessing whoever wrote the driver is waiting for the port to be in a certain state which will never happen if the null modem cable is connected. When I disconnect, the port passes the test and the booting process moves on. Why on earth is there such a loop in the driver? Talk to your programmer.READ FULL REVIEW