Krzysztof Pierwieniecki [mailto:kpierwienie...@teldat.com.pl] wrote:
]I have a problem on Intel DQ77KB board. I have two the same boards and ]on every board Memtest86 reports a problem at 2990.8MB. That problem ]occur only if I use 4 or 8GB memory. With 2GB memory everything is OK. ] ]What may be causing errors in Test2 "Address test, own address, ]Parallel" in Memtest86? ]http://www.memtest86.com/technical.htm ] ]Chris The USB controller might be using memory reported as free in the E820 map. The address 2990.8MB would be around BAECCCCCh. The log file shows that SeaBIOS uses memory around there for USB. Yet the SeaBIOS E820 map shows memory through BAEDCFFF as available RAM. I once debugged a problem like this. Dumping the failing address range with a DOS mode debugger showed a location that was constantly incrementing. That location turned out to be a periodic counter used by the USB controller. The problem was E820 reporting the USB memory as free, just like Wang Fei suggested. Thanks, Scott -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
