The Xilinx Jtag cable is a USB/LPT Jtag programming cable. Ill give you a link if you don't believe me. And the cable I was talking about is the LPT version of the Jtag cable. The thing you are thinking about that reads and writes the nand is just a simple LPT nand flasher/reader.
You need a USB Jtag programming cable
Jtag USB cableor you can get the LPT version
Jtag LPT cableboth of those can be used to program the matrix glitcher, but see my problem is that I dont have a readily available LPT port so its either not buy this and wait or go with the 45$ cable. The USB Jtag cable is WAYYYY too hard to make at least at my experience.
if you dont believe that...then look at the matrix glitcher. See the 4 pins on the side? now look at the Jtag programming cables. They both have the same pins, VCC, TDI, TMS, etc.
There are no details of it on the site but it's only $12.