<html>Hi,<br /><br /> I recently bought two VMAC V1 Mini PC's with Winbond W25Q64FWSIG EFI chips. Updating the EFI information on teh devices using the normal software route is extremely flakey and I managed to corrupt the EFI on both boards, making them unbootable.<br /><br />I now have a Chinese CH341a ("Black Edition") usb programmer and a "piggy-back" 1.8v adapter and can connect to the Winbond chip using a test clip.<br /><br />I installed flashrom from the debian package V0.99 and can do a:<br /><br /><br /><br />Initially, I thought I had problems getting the clip properly seated, but no matter how much I clean the contacts and re-seat the clip, if I do a:<br /> <span style="font-size: 13px;">#flashrom -p ch341a_spi -V<br /><br />I get (randomly):</span><br />Found Winbond flash chip "unknown Winbond (ex Nexcom) SPI chip" (0 kB, SPI) on ch341a_spi.<br />Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI) on ch341a_spi.<br />Found Winbond flash chip "W25Q64.W" (8192 kB, SPI) on ch341a_spi.<br /><br />Finding the correct chip or not seems to have little or nothing to do with the physical contact to the chip.<br />If I then try to erase the chip. I get:<br /><br /> # flashrom -p ch341a_spi -c W25Q64.W -E<br />flashrom v0.9.9-r1954 on Linux 4.10.1-towo.1-siduction-amd64 (x86_64)<br />flashrom is free software, get the source code at https://flashrom.org<br /><br />Calibrating delay loop... OK.<br />Found Winbond flash chip "W25Q64.W" (8192 kB, SPI) on ch341a_spi.<br />Erasing and writing flash chip... FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x00000fff: 0x1000<br />ERASE FAILED!<br />Reading current flash chip contents... done. Looking for another erase function.<br />FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x00007fff: 0x53cb<br />ERASE FAILED!<br />Reading current flash chip contents... done. Looking for another erase function.<br />FAILED at 0x00000000! Expected=0xff, Found=0xd6, failed byte count from 0x00000000-0x0000ffff: 0x9264<br />ERASE FAILED!<br />Reading current flash chip contents... done. Looking for another erase function.<br />FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x007fffff: 0x5e1391<br />ERASE FAILED!<br />Reading current flash chip contents... done. Looking for another erase function.<br />FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x007fffff: 0x5ce187<br />ERASE FAILED!<br />Looking for another erase function.<br />No usable erase functions left.<br />FAILED!<br />Your flash chip is in an unknown state.<br />Please report this on IRC at chat.freenode.net (channel #flashrom) or<br />mail flashrom@flashrom.org, thanks!<br /><br /><br />Again, the hex codes for the failures seem pretty random and are different each time I try the command.<br /><br />I attach the log.<br /><br /> Can anyone say what's going on?<br /><br /> Best Regards<br /><br />Marius</html>