If you use ltssm_display or ltssm_save2file to read the LTSSM states and other status information, all that information is cleared after the execution of these commands. However, you can use the ltssm_save_oldstates command to overcome this hardware FIFO read clear limitation.
The first time you use ltssm_save_oldstates, it saves all states to the file provided at the command line. If you use this command again, it appends new readings to the same file and displays on the TCL console all the LTSSM states saved to the file.
This is a new command that is added in the 18.1 release of Intel® Quartus® Prime.
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