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please can you elaborate a little more..
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The JTAG TAP machine is on page 10
http://www.altera.com/literature/ug/ug_virtualjtag.pdf If you hold TMS high and clock TCK 5 times, then you will end up in the TAP reset state (TEST_LOGIC_RESET). The device IDCODE will be loaded into the DR register.
If you clock in the TMS code 0, 1, 0, 0, you will be in the SHIFT_DR state.
Hold TMS low and pulse TCK for 32 clocks and IDCODE will be shifted out on the TDO pin.
Put the TAP back in reset, and repeat.
You should then have a data stream on every TDO pin on your board.
If you don't, then your JTAG chain is broken.
Cheers,
Dave
Honored Contributor
