I have used following command to program my Acer C720: ./flashrom -p internal:ich_spi_forces=yes -V -N --ifd -i bios -w peppy/coreboot-peppy-seabios-latest.ro m > ferr.txt 2>&1
The eprom chip in this computer is: 25Q64FVSIG and yes I have remover write protection screw. I have received following response from this flashrom command:---------flashrom v1.0 on Linux 4.9.0-8-amd64 (x86_64)flashrom is free software, get the source code at https://flashrom.org flashrom was built with libpci 3.5.2, GCC 6.3.0 20170516, little endianCommand line (9 args): ./flashrom -p internal:ich_spi_forces=yes -V -N --ifd -i bios -w peppy/coreboot-peppy-seabios-latest.romUsing clock_gettime for delay loops (clk_id: 1, resolution: 1ns).Initializing internal programmerFound candidate at: 00000500-00000510Found coreboot table at 0x00000500.Found candidate at: 00000000-00000194Found coreboot table at 0x00000000.coreboot table found at 0x7becf000.coreboot header(24) checksum: 72d0 table(404) checksum: f9e3 entries: 10Vendor ID: GOOGLE, part ID: PeppyUsing Internal DMI decoder.DMI string chassis-type: "Desktop"DMI string system-manufacturer: "GOOGLE"DMI string system-product-name: "Peppy"DMI string system-version: "1.0"DMI string baseboard-manufacturer: "GOOGLE"DMI string baseboard-product-name: "Peppy"DMI string baseboard-version: "1.0"Found chipset "Intel Lynx Point LP Mainstream" with PCI ID 8086:9c45.This chipset is marked as untested. If you are using an up-to-date versionof flashrom *and* were (not) able to successfully update your firmware with it,then please email a report to flashrom@flashrom.org including a verbose (-V) log.Thank you!Enabling flash write... Root Complex Register Block address = 0xfed1c000Error accessing ICH RCRB, 0x4000 bytes at 0x00000000fed1c000/dev/mem mmap failed: Operation not permittedFAILED!FATAL ERROR!Unhandled programmer parameters (possibly due to another failure): ich_spi_forces=yesError: Programmer initialization failed.-------- Also please find attached output of dmidecoed from this C720 computer: I will appreciate any suggestion.