I have a Xilinx Spartan 3 board, and comes only with the parallel JTAG cable. My big problem is that any of my computers have parallel port, and I can't program it. As I work with a desktop and a laptop I had to discard buying a pci parallel card. I know that they have an usb and serial cable, but are very expensive and the shipping too. I'd like to know if there is any alternative, such as a homemade serial or usb cable, or if any of those parallel-to-usb adapters work with this.