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This is an original Altera USB Blaster. You're right, it does have PID 6003.
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Ok.
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However, when I connected it to another PC, it recognized it as Altera USB Blaster (still with PID 6003). On both PCs this USB Blaster isn't recognized by the quartus programmer. Another USB Blaster that I have is working fine. I saved the FTDI data from the working device and burned it to the non-working, but the problem remains. Any ideas?
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The only thing used to distinguish whether or not a USB device is a USB-Blaster is the USB descriptors it sends when the device enumerates. If you've use FT_PROG to save the setup of one USB-Blaster and programmed it to another, then assuming you did not change the serial number, the two USB-Blasters are indistinguishable to the operating system, so either one should show up in the Quartus programmer.
Having identical serial numbers is not useful if you plug both USB-Blasters in at the same time, but you could make them the same for the purpose of testing each USB-Blaster one at a time.
Try jtagconfig -n with the USB-Blaster plugged into a board too.
Cheers,
Dave
Honored Contributor
