Why do I incorrectly read "X" when simulating memories using altera_syncram in the Synopsys* VCS* simulator? - Why do I incorrectly read "X" when simulating memories using altera_syncram in the Synopsys* VCS* simulator? Description Due to a problem in the Intel® Quartus® Prime Pro Edition Software version 21.3 and earlier, you may observe an incorrect "X" value on the output data in the altera_syncram simulation model block. This problem occurs when you turn on X-prop mode in the Synopsys* VCS* simulator. Resolution To work around this problem, exclude the altera_syncram module from the Synopsys* VCS* simulator X-prop mode. Custom Fields values: ['novalue'] Troubleshooting 1508806207 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] No plan to fix 21.3 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']