Byte Blaster II problem

[Altera_Forum]

Hi, 

 I have a Byte Blaster II old one(of 2002),if i connect to LPT port it shows Byte Blaster II in quartus programmer,but when i connect it to target device(i.e Cyclone IV GX PCIE board), its unable to scan the JTAG chain. I need your help in debugging the Blaster.  PS: for same board Byte Blaster MV is working.

[Altera_Forum]

Check your BIOS settings. Could be that your parallel port EPP/ECP mode is not playing well with the Byte Blaster. 

 Also, what voltage is your target logic ? As I recall the old Byte Blaster II was a 5V device, though I have seen it work on 3.3V boards.

[Altera_Forum]

In quartus programmer it is getting detected.(showing byte blaster II), the problem is unable to scan the JTAG, I tried to debugg it, It has LT part and few transistors(around 20nos). 

My target logic is 2.5V its a cyclone iv GX device.

[Altera_Forum]

If as per ur saying,byte blaster is working and detected and for other boards it works nicely then it seems the problem of JTAG in your FPGA,though not sure.

[Altera_Forum]

Hi Supal Shah, 

 The target board i have checked with byte blaster mv/USB blaster, its working fine. I even reduced the length of jtag cable, No result. i think some components have gone bad in Byte Blaster II.

[Altera_Forum]

I think your problem is that the ByteBlaster II was really intended for 5V logic, whereas the MV (=Multi-Voltage) was designed to work with lower voltages.  

 I'm sure the BB will not work on 2.5V logic. Any way to increase your JTAG chain logic to 3.3V ?