Why are the peripherals under 2GB Peripheral Region still cached by the Nios® V/g processor? - Why are the peripherals under 2GB Peripheral Region still cached by the Nios® V/g processor? Description Due to a problem in the: Quartus® Prime Pro Edition Software version 23.1, 23.2, 23.3, 23.4, 24.1, 24.2, 24.3, 24.3.1, 25.1 Quartus® Prime Standard Edition Software version 23.1, 24.1 The Nios® V/g processor still caches the peripherals if they are placed under a Peripheral Region that is configured to 2GB, regardless of the Base Address. This is due to a problem in the processor RTL failing to correctly implement the 2GB Peripheral Region. Other Peripheral Region sizes are not affected; only 2GB is affected. Resolution To work around this problem, please select other Peripheral Region sizes except 2GB . The Nios® V/g processor still offers Peripheral Region sizes ranging from 64KB to 1GB. The 2GB Size option for Nios® V/g processor Peripheral Region is removed beginning with the Quartus® Prime Pro Edition Software version 25.1.1 and Quartus® Prime Standard Edition Software version 25.1. Custom Fields values: ['novalue'] Troubleshooting 15017048092 novalue ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 25.1.1 23.1 ['Agilex™ 5 FPGAs and SoCs', 'Agilex™ 7 FPGAs and SoCs', 'Arria® 10 FPGAs and SoCs', 'Cyclone® 10 GX FPGA', 'Stratix® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']