I am planning to build a cheap programming cable for Xilinx CPLDs/ FPGAs. I found one in the internet here. But I was confused with the cable wiring diagram. For FPGAs and CPLDs the programming pins are TDI, TDO, TMS and TCK. I could not find all the pins in the diagram. Are they renamed with other names here. Alternatively, does anyone know of any other simple DIY programmer.
OK.. I found the ckt in an Xilinx application notes here. So I suppose it should work. I wanted to modify it to add a status LED to indicate if the programming cable works. Does anyone suppose that if I added a LED + resistor in parallel to 5 v supply, will the programmer continue working and indicate that it is getting power supply from FPGA/CPLD side (snapshot of modification attached.)**broken link removed**