ALTERA DOES NOT WARRANT THAT THE FUNCTIONS CONTAINED IN THIS PATCH WILL MEET YOUR REQUIREMENTS, OR THAT THE OPERATION OF THIS PATCH WILL BE UNINTERRUPTED OR ERROR-FREE. //**************************************************************** quartus-12.0-0.13-readme.txt Readme file for Quartus II 12.0 Patch 0.13 Copyright (C) Altera Corporation 2012 All right reserved. Patch created on June 27 2012 Patch SPR#: 59661 SPRs fixed: //**************************************************************** Problem: In some situation, debug tools that depend on JTAG communication may produce incorrect result or JTAG communication error using Quartus II 12.0 software, such as SignalTap II, In-System Source and Probe, and so on. Workaround: Apply this patch that changes how JTAG communication is handled. If problem is not solved, try to use the tools from earlier version of Quartus II software. No recompilation is needed as this pertains to JTAG communication only. If this patch doesn't solve your problem, please report to Altera support on whether earlier version of Quartus II software solved your problem or not. Caution - You must either have previously installed the Quartus II 12.0 software or must install the Quartus II 12.0 software before installing this patch. Otherwise, the patch will not be installed correctly and the Quartus II software will not run properly.