Re: USB Blaster clone
I didn't build the said device, but I'm frequently working with FTDI chips and original USB Blaster. I've also previously analyzed USB Blaster circuit and operation. The USB interface must me operational for MPROG to work, including bus connectiion, power supply, 6 MHz crystal, 93C46 interface. The CPLD and JTAG related circuit part may be or may be not assembled.
P.S.: The device would be detected also without the 93C46, but can't be programmed of course.