I got a "Dual Port Serial Card (9 Pin), RS232/422, dual UART's I don't know the who is the manufacturer of the card is. Thus I am having trouble setting the jumpers without any manual or guide. There is NOT a name on the card the only symbol it has is a very small "A" with a circle around it, along with 3083 Rev.E.(But this could be the PC Board manufacture.) This past week I have been to various sites and spent time browsing through information. If anyone could help please send respond. I purchased a PC (at an auction site) and that is the reason for no manual.