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My problem is that the flex10K board has a jtag port but i can't recognize the device if i put my usb blaster cable on it.
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What version of Quartus are you using?
If you want to synthesize for the FLEX10K devices, you need to install 9.0SP2.
I think the latest version of Quartus should still recognize a FLEX10K device, even if it will not let you synthesize a design for it. Have you tried using the JTAG debugger to read the IDCODE?
How have you wired your USB-Blaster into the FLEX10K board? You comment that the board has a byte-blaster circuit built into it. Did you connect your USB-Blaster to the inputs to this byte-blaster circuit, or did you remove it, and attach the USB-Blaster directly to the FPGA JTAG pins?
The USB-Blaster power for its internal buffer comes from the target, so you need to make sure you have that connected.
Cheers,
Dave
Honored Contributor
