How to restore Altera 7128S ISP function

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Epegic

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Hi,
I got an used 7128s but ByteMaster programmer complaints "unrecognized deviec or empty socket". I think the cause was those JTAG pins were used for IO and thus ISP function blocked.
I don't have a standalone programmer to erase the chip, are there any way to restore the ISP function.

Regards,
Epegic
 

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