I tried the unbuffered jtag programmer, it is partly working. It allows me to go into the device with impact and select various command. For exmaple I can get the device id or checksum, but when I try to erase or program I receive fail. Any ideas?
Second point, why is the buffered device use tri state buffers and not just normal buffers without tristate.
Third point, is impact able to know when the programmer is buffered or not since it seems the buffered one requires more inputs from lpt?